Cisco Service Control Engine (SCE) Software Configuration Guide, Rel 3.1
Configuring the Management Interface and Security

Table Of Contents

Configuring the Management Interface and Security

About Management Interface and Security

How to Configure the Management Ports

Configuring the Management Ports

How to Enter Management Interface Configuration Mode

About Management Interface Configuration Mode

How to Configure the Management Port Physical Parameters

How to Set the IP Address and Subnet Mask of the Management Interface

How to Configure the Management Interface Speed and Duplex Parameters

How to Specify the Active Management Port

How to Configure Management Interface Redundancy

About Management Port Redundancy

How to Configure the Management Ports for Redundancy

How to Configure the Fail-Over Mode

How to Configure Management Interface Security

About Management Interface Security

How to Configure the IP Fragment Filter

How to Configure the Permitted and Not-permitted IP Address Monitor

How to Monitor Management Interface IP Filtering

How to Configure the Available Interfaces

How to Configure TACACS+ Authentication, Authorization, and Accounting

How to Configure Access Control Lists (ACLs)

How to Configure the Telnet Interface

How to Configure the SSH Server

Enabling the SNMP Interface

How to Configure and Manage the SNMP Interface

Information About the SNMP Interface

How to Configure SNMP Community Strings

How to Configure SNMP Notifications

How to Manage Passwords

About Passwords

Changing Your Password

Verifying that the Password has been Successfully Changed

Password Encryption

Password Recovery

IP Configuration

How to Configure the IP Routing Table

IP Advertising

How to Configure the IP Address of the Management Interface

How to Configure Time Clocks and Time Zone

About Time Clocks and Time Zone

How to Display the System Time

How to Display the Calendar Time

How to Set the System Clock

How to Set the Calendar

How to Set the Time Zone

How to Remove the Current Time Zone Setting

How to Configure Daylight Saving Time

How to Configure SNTP

About SNTP

How to Enable the SNTP Multicast Client

How to Disable the SNTP Multicast Client

How to Enable the SNTP Unicast Client

How to Disable the SNTP Unicast Client

How to Define the SNTP Unicast Update Interval

How to Display SNTP Information

How to Configure Domain Name Server (DNS) Settings

About Domain Name Servers

How to Configure DNS Lookup

How to Configure Name Servers

How to Add a Host to the Host Table

How to Display Current DNS Settings

How to Configure the Management Port Physical Parameters

How to Configure the Management Interface Speed and Duplex Parameters

How to Monitor the Management Interface


Configuring the Management Interface and Security


This module describes how to configure the physical management interfaces (ports) as well as the various management interface applications, such as SNMP, SSH, and TACACS+. It also explains how to configure users, passwords, IP configuration, clock and time zone, and domain name settings.

About Management Interface and Security 

How to Configure the Management Ports 

How to Enter Management Interface Configuration Mode 

How to Configure the Management Port Physical Parameters 

How to Configure Management Interface Redundancy 

How to Configure Management Interface Security 

How to Configure the Available Interfaces 

How to Configure and Manage the SNMP Interface 

How to Manage Passwords 

IP Configuration 

How to Configure Time Clocks and Time Zone 

How to Configure SNTP 

How to Configure Domain Name Server (DNS) Settings 

How to Configure the Management Port Physical Parameters 

About Management Interface and Security

The SCE platform is equipped with two RJ-45 management (MNG) ports. These ports provide access from a remote management console to the SCE platform via a LAN.

The two management ports support management interface redundancy, providing the possibility for a backup management link.

In addition to the Layer 1 security of a backup management link, the Service Control platform provides a further management interface security feature; an IP filter that monitors for various types of TCP/IP attacks. This filter can be configured with thresholds rates both for defining an attack and defining the end of an attack.


Note The second management port is reflected in all objects related to it in the SNMP interface.


Perform the following tasks to configure the management interface and management interface security:

Configure the management port:

Physical parameters

Specify active port (if not redundant installation)

Redundancy (if redundant installation)

Configure management interface security

Enable IP fragment filtering

Configure the permitted and not-permitted IP address monitor

How to Configure the Management Ports

Configuring the Management Ports 

Configuring the Management Ports

Perform the following tasks to configure the management ports:

Configure the IP address and subnet mask (only one IP address for the management interface, not one IP address per port).

Configure physical parameters:

Duplex

Speed

Configure redundant management interface behavior (optional):

Fail-over mode

If fail-over mode is disabled, specify the active port (optional).

To configure the system with management interface redundancy, see How to Configure Management Interface Redundancy Configuring the Management Ports for Redundancy.

SUMMARY STEPS

1. Cable the desired management port, connecting it to the remote management console via the LAN.

2. Disable the automatic fail-over mode. (See How to Disable Automatic Fail-Over Mode.)

3. Configure the management port physical parameters. (See How to Configure the Management Port Physical Parameters.)

DETAILED STEPS


Step 1 Cable the desired management port, connecting it to the remote management console via the LAN.

Step 2 Disable the automatic fail-over mode. (See How to Disable Automatic Fail-Over Mode.)

Step 3 Configure the management port physical parameters. (See How to Configure the Management Port Physical Parameters.)


How to Enter Management Interface Configuration Mode

interface Mng

About Management Interface Configuration Mode 

About Management Interface Configuration Mode

When entering Management Interface Configuration Mode, you must indicate the number of the management port to be configured:

0/1 — Mng port 1

0/2 — Mng port 2

The following Management Interface commands are applied only to the port specified when entering Management Interface Configuration Mode. Therefore, each port must be configured separately:

speed

duplex

The following Management Interface commands are applied to both management ports, regardless of which port had been specified when entering Management Interface Configuration Mode. Therefore, both ports are configured with one command:

ip address

auto-fail-over

SUMMARY STEPS

1. Type configure and press Enter.

2. Type interface Mng {0/1|0/2} and press Enter.

DETAILED STEPS


Step 1 Type configure and press Enter.

Enables Global Configuration mode.

The command prompt changes to SCE(config)#.

Step 2 Type interface Mng {0/1|0/2} and press Enter.

Enables Management Interface Configuration mode.

The command prompt changes to SCE(config if)#


How to Configure the Management Port Physical Parameters

This interface has a transmission rate of 10 or 100 Mbps and is used for management operations and for transmitting RDRs, which are the output of traffic analysis and management operations.

How to Set the IP Address and Subnet Mask of the Management Interface 

How to Configure the Management Interface Speed and Duplex Parameters 

How to Specify the Active Management Port 

How to Set the IP Address and Subnet Mask of the Management Interface

Setting the IP Address and Subnet Mask of the Management Interface 

Options 

Setting the IP Address and Subnet Mask of the Management Interface: Example 

Setting the IP Address and Subnet Mask of the Management Interface

The user must define the IP address of the management interface.

When both management ports are connected, providing a redundant management port, this IP address always acts as a virtual IP address for the currently active management port, regardless of which port is the active port.

Options

The following options are available:

IP address — The IP address of the management interface.

If both management ports are connected, so that a backup management link is available, this IP address will be act as a virtual IP address for the currently active management port, regardless of which physical port is currently active.

subnet mask — subnet mask of the management interface.

Changing the IP address of the management interface via telnet will result in loss of the telnet connection and inability to reconnect with the interface.


Step 1 From the SCE(config if)# prompt, type ip address ip-address subnet-maskand press Enter.

The command might fail if there is a routing table entry that is not part of the new subnet defined by the new IP address and subnet mask.


Note Changing the IP address of the management interface via telnet will result in loss of the telnet connection and inability to reconnect with the interface.



Note After changing the IP address, you must reload the SCE platform so that the change will take effect properly in all internal and external components of the SCE platform. (See How to Reboot and Shut Down the SCE Platform.)



Setting the IP Address and Subnet Mask of the Management Interface: Example

The following example shows how to set the IP address of the SCE platform to 10.1.1.1 and the subnet mask to 255.255.0.0.

SCE(config if)#ip address 10.1.1.1 255.255.0.0

How to Configure the Management Interface Speed and Duplex Parameters

This section presents sample procedures that describe how to configure the speed and the duplex of the Management Interface.

Both these parameters must be configured separately for each port.

Interface State Relationship to Speed and Duplex 

How to Configure the Speed of the Management Interface 

How to Configure the Duplex Operation of the Management Interface 

Interface State Relationship to Speed and Duplex

The following table summarizes the relationship between the interface state and speed and duplex.

Table 5-1 Interface State Relationship to Speed and Duplex

Speed

Duplex

Actual FE Interface State

Auto

Auto

Auto negotiation

Auto

Full

Auto negotiation

Auto

Half

Auto negotiation

10

Auto

Auto-negotiation (duplex only)

10

Full

10 Mbps and full duplex

10

Half

10 Mbps and half duplex

100

Auto

Auto-negotiation (speed only)

100

Full

100 Mbps and full duplex

100

Half

100 Mbps and half duplex


How to Configure the Speed of the Management Interface

Options 

Configuring the Speed of the Management Interface: Example 

Options

The following options are available:

speed — speed in Mbps of the currently selected management port (0/1 or 0/2):

10

100

auto (default) — auto-negotiation (do not force speed on the link)

If the duplex parameter is configured to auto , changing the speed parameter has no effect (see  ).


Step 1 From the SCE(config if)# prompt, type speed 10|100|autoand press Enter.

Specify the desired speed option.


Configuring the Speed of the Management Interface: Example

The following example shows how to use this command to configure the Management port to 100 Mbps speed.

SCE(config if)#speed 100

How to Configure the Duplex Operation of the Management Interface

Options 

Configuring the Duplex Operation of the Management Interface: Example 

Options

The following options are available:

duplex — duplex operation of the currently selected management port (0/1 or 0/2):

full

half

auto (default) — auto-negotiation (do not force duplex on the link)

If the speed parameter is configured to auto , changing the duplex parameter has no effect (see  ).


Step 1 From the SCE(config if)# prompt, type duplex auto|full|halfand press Enter.

Specify the desired duplex option.


Configuring the Duplex Operation of the Management Interface: Example

The following example shows how to use this command to configure a management port to half duplex mode.

SCE(config if)#duplex half

How to Specify the Active Management Port

Specifying the Active Management Port 

Options 

Specifying the Active Management Port: Example 

Specifying the Active Management Port

This command explicitly specifies which management port is currently active. Its use varies slightly, depending on whether the management interface is configured as a redundant interface (auto fail-over enabled) or not (auto fail-over disabled).

auto fail-over enabled (automatic mode) — the specified port becomes the currently active port, in effect forcing a fail-over action even if a failure has not occurred.

auto fail-over disabled (manual mode) — the specified port should correspond to the cabled Mng port, which is the only functional port and therefore must be and remain the active management port.


Note This command is a Privileged Exec command, unlike the other commands in this section, which are Mng Interface Configuration commands. If in Mng interface configuration mode, you must exit to the privileged exec mode and see the SCE# prompt displayed.


Options

The following options are available:

slot-number/interface-number — The interface number (0/1 or 0/2) of the management port that is specified as the active port.


Step 1 From the SCE# prompt, type Interface Mng {0/1 | 0/2} active-port and press Enter.

Specify the desired MNG interface.


Specifying the Active Management Port: Example

The following example shows how to use this command to configure Mng port 2 as the currently active management port.

SCE# Interface Mng 0/2 active-port

How to Configure Management Interface Redundancy

About Management Port Redundancy 

How to Configure the Management Ports for Redundancy 

How to Configure the Fail-Over Mode 

About Management Port Redundancy

The SCE platform contains two RJ-45 management ports. The two management ports provide the possibility for a redundant management interface, thus ensuring management access to the SCE platform even if there is a failure in one of the management links. If a failure is detected in the active management link, the standby port automatically becomes the new active management port.

Note that both ports must be connected to the management console via a switch. In this way, the IP address of the MNG port is always the same, regardless of which physical port is currently active.

Important information:

Only one port is active at any time.

The same virtual IP address and MAC address are assigned to both ports.

Default:

Port 1 = active

Port 2 = standby

The standby port sends no packets to the network and packets from the network are discarded.

When a problem in the active port is encountered, the standby port automatically becomes the new active port.

Link problem, with switch to standby MNG port, is declared after the link is down for 300 msec.

Service does not revert to the default active port if/when that link recovers. The currently active MNG port remains active until link failure causes a switch to the other MNG port.

How to Configure the Management Ports for Redundancy

SUMMARY STEPS

1. Cable both management ports (Mng 1 and Mng 2), connecting them both to the remote management console via the LAN and via a switch.

2. Configure the automatic fail-over mode.

3. Configure the IP address for the management interface.

4. Configure the speed and duplex for both management ports.

DETAILED STEPS


Step 1 Cable both management ports (Mng 1 and Mng 2), connecting them both to the remote management console via the LAN and via a switch.

Using the switch ensures that the IP address of the MNG port is always the same, regardless of which physical port is currently active

Step 2 Configure the automatic fail-over mode.

See How to Configure the Fail-Over Mode.

Step 3 Configure the IP address for the management interface.

The same IP address will always be assigned to the active management port, regardless of which physical port is currently active.

See How to Set the IP Address and Subnet Mask of the Management Interface.

Step 4 Configure the speed and duplex for both management ports.

See How to Configure the Management Interface Speed and Duplex Parameters.


How to Configure the Fail-Over Mode

Configuring the Fail-Over Mode 

Options 

How to Enable Automatic Fail-Over Mode 

How to Disable Automatic Fail-Over Mode 

Configuring the Fail-Over Mode

Use the following command to enable automatic fail-over. The automatic mode must be enabled to support management interface redundancy. This mode automatically switches to the backup management link when a failure is detected in the currently active management link.

This parameter can be configured when in management interface configuration mode for either management port, and is applied to both ports with one command.

Options

The following options are available:

auto/ no auto — Enable or disable automatic fail-over switching mode

Default — auto (automatic mode)

How to Enable Automatic Fail-Over Mode


Step 1 From the SCE(config if)# prompt, type auto-fail-over and press Enter.


How to Disable Automatic Fail-Over Mode


Step 1 From the SCE(config if)# prompt, type no auto-fail-over and press Enter.


How to Configure Management Interface Security

About Management Interface Security 

How to Configure the IP Fragment Filter 

How to Configure the Permitted and Not-permitted IP Address Monitor 

How to Monitor Management Interface IP Filtering 

About Management Interface Security

Management security is defined as the capability of the SCE platform to cope with malicious management conditions that might lead to global service failure. Resiliency to attacks on the management port includes the following features:

The SCE platform remains stable during flooding attack.

The number of TCP/IP stack control protocol vulnerabilities is minimized.

The availability of reporting capabilities on attacks on the management port.

There are two parallel security mechanisms:

Automatic security mechanism — monitors the TCP/IP stack rate at 200 msec intervals and throttles the rate from the device if necessary.

This mechanism always functions and is not user-configurable.

User-configurable security mechanism — accomplished via two IP filters at user-configurable intervals:

IP fragment filter — Drops all IP fragment packets

IP filter monitor — Measures the rate of accepted and dropped packets for both permitted and not-permitted IP addresses.

How to Configure the IP Fragment Filter

Options 

How to Enable the IP Fragment Filter 

How to Disable the IP Fragment Filter 

Options

The following options are available:

enable/disable — Enable or disable IP fragment filtering

Default — disable

How to Enable the IP Fragment Filter


Step 1 SFrom the SCE(config)# prompt, type ip filter fragment enable and press Enter.


How to Disable the IP Fragment Filter


Step 1 From the SCE(config)# prompt, type ip filter fragment disable and press Enter.


How to Configure the Permitted and Not-permitted IP Address Monitor

Options

The following options are available:

I p permitted/ip not-permitted — Specifies whether the configured limits apply to permitted or not-permitted IP addresses.

If neither keyword is used, it is assumed that the configured limits apply to both permitted and not-permitted IP addresses.

low rate — lower threshold; the rate in Mbps that indicates the attack is no longer present.

Default — 20

high rate — upper threshold; the rate in Mbps that indicates the presence of an attack.

Default — 20

burst size — duration of the interval in seconds that the high and low rates must be detected in order for the threshold rate to be considered to have been reached

Default — 10


Step 1 From the SCE(config)# prompt, type ip filter monitor {ip_permited|ip_not_permited} low_rate low_ratehigh_rate high_rateburst burst sizeand press Enter.


How to Monitor Management Interface IP Filtering

Monitoring Management Interface IP Filtering

Use this command to display the following information for management interface IP filtering.

IP fragment filter enabled or disabled

configured attack threshold (permitted and not-permitted IP addresses)

configured end of attack threshold (permitted and not-permitted IP addresses)

burst size in seconds (permitted and not-permitted IP addresses)


Step 1 From the SCE>prompt, type show ip filter and press Enter.


How to Configure the Available Interfaces

The system allows you to configure the Telnet and SNMP interfaces according to the manner in which you are planning to manage the SCE platform and the external components of the system.

How to Configure TACACS+ Authentication, Authorization, and Accounting 

How to Configure Access Control Lists (ACLs) 

How to Configure the Telnet Interface 

How to Configure the SSH Server 

Enabling the SNMP Interface 

How to Configure TACACS+ Authentication, Authorization, and Accounting

Information About TACACS+ Authentication, Authorization, and Accounting 

How to Configure the SCE Platform TACACS+ Client 

How to Manage the User Database 

How to Configure AAA Login Authentication 

How to Configure AAA Privilege Level Authorization Methods 

How to Configure AAA Accounting 

How to Monitor TACACS+ Servers 

How to Monitor TACACS+ Users 

Information About TACACS+ Authentication, Authorization, and Accounting

TACACS+ Authentication, Authorization, and Accounting 

Login Authentication 

Accounting 

Privilege Level Authorization 

General AAA Fallback and Recovery Mechanism 

About Configuring TACACS+ 

TACACS+ Authentication, Authorization, and Accounting

TACACS+ is a security application that provides centralized authentication of users attempting to gain access to a network element. The implementation of TACACS+ protocol allows customers to configure one or more authentication servers for the SCE platform, providing a secure means of managing the SCE platform, as the authentication server will authenticate each user. This then centralizes the authentication database, making it easier for the customers to manage the SCE platform.

TACACS+ services are maintained in a database on a TACACS+ server running, typically, on a UNIX or Windows NT workstation. You must have access to and must configure a TACACS+ server before the configured TACACS+ features on your network element are available.

The TACACS+ protocol provides authentication between the network element and the TACACS+ ACS, and it can also ensure confidentiality, if a key is configured, by encrypting all protocol exchanges between a network element and a TACACS+ server.

The TACACS+ protocol provides the following three features:

Login authentication

Privilege level authorization

Accounting

Login Authentication

The SCE platform uses the TACACS+ ASCII authentication message for CLI, Telnet and SSH access.

TACACS+ allows an arbitrary conversation to be held between the server and the user until the server receives enough information to authenticate the user. This is usually done by prompting for a username and password combination.

The login and password prompts may be provided by the TACACS+ server, or if the TACACS+ server does not provide the prompts, then the local prompts will be used.

The user log in information (user name and password) is transmitted to the TACACS+ server for authentication. If the TACACS+ server indicates that the user is not authenticated, the user will be re-prompted for the user name and password. The user is re-prompted a user-configurable number of times, after which the failed login attempt is recorded in the SCE platform user log and the telnet session is terminated (unless the user is connected to the console port.)

The SCE platform will eventually receive one of the following responses from the TACACS+ server:

ACCEPT - The user is authenticated and service may begin.

REJECT - The user has failed to authenticate. The user may be denied further access, or will be prompted to retry the login sequence depending on the TACACS+ server.

ERROR - An error occurred at some time during authentication. This can be either at the server or in the network connection between the server and the SCE platform. If an ERROR response is received, the SCE platform will try to use an alternative method\server for authenticating the user.

CONTINUE - The user is prompted for additional authentication information.

If the server is unavailable, the next authentication method is attempted, as explained in General AAA Fallback and Recovery Mechanism.

Accounting

The TACACS+ accounting supports the following functionality:

Each executed command (the command must be a valid one) will be logged using the TACACS+ accounting mechanism (including login and exit commands).

The command is logged both before and after it is successfully executed.

Each accountingmessage contains the following:

User name

Current time

Action performed

Command privilege level

TACACS+ accounting is in addition to normal local accounting using the SCE platform dbg log.

Privilege Level Authorization

After a successful login the user is granted a default privilege level of 0, giving the user the ability to execute a limited number of commands. Changing privilege level is done by executing the "enable" command. This command initiates the privilege level authorization mechanism.

Privilege level authorization in the SCE platform is accomplished by the use of an "enable" command authentication request. When a user requests an authorization for a specified privilege level, by using the "enable" command, the SCE platform sends an authentication request to the TACACS+ server specifying the requested privilege level. The SCE platform grants the requested privilege level only after the TACACS+ server does the following:

Authenticates the " enable" command password

Verifies that the user has sufficient privileges to enter the requested privilege level.

Once the user privilege level has been determined, the user is granted access to a specified set of commands according to the level granted.

As with login authentication, if the server is unavailable, the next authentication method is attempted, as explained in General AAA Fallback and Recovery Mechanism.

General AAA Fallback and Recovery Mechanism

The SCE platform uses a fall-back mechanism to maintain service availability in case of an error.

The SCE platform uses a fall-back mechanism to maintain service availability in case of an error.

The AAA methods available are:

TACACS+ - AAA is performed by the use of a TACACS+ server, allows authentication, authorization and accounting.

Local - AAA is performed by the use of a local database, allows authentication and authorization.

Enable - AAA is performed by the use of user configured passwords, allows authentication and authorization.

None - no authentication\authorization\accounting is performed.

In the current implementation the order of the methods used isn't configurable but the customer can choose which of the methods are used. The current order is

TACACS+

Local

Enable

None


Note Important: If the server goes to AAA fault, the SCE platform will not be accessible until one of the AAA methods is restored. In order to prevent this, it is advisable to use the "none" method as the last AAA method. If the SCE platform becomes un-accessible, the shell function "AAA_MethodsReset" will allow the user to delete the current AAA method settings and set the AAA method used to "Enable".


About Configuring TACACS+

The following is a summary of the procedure for configuring TACACS+. All steps are explained in detail in the remainder of this section.

1. Configure the remote TACACS+ servers.

Configure the remote servers for the protocols. Keep in mind the following guidelines

Configure the encryption key that the server and client will use.

The maximal user privilege level and enable password (password used when executing the enable command) should be provided.

The configuration should always include the root user, giving it the privilege level of 15.

Viewer (privilege level 5) and superuser (privilege level 10) user IDs should be established at this time also.

1. For complete details on server configuration, refer to the appropriate configuration guide for the particular TACACS+ server that you will be using.

2. Configure the SCE client to work with TACACS+ server:

hostname of the server

port number

shared encryption key (the configured encryption key must match the encryption key configured on the server in order for the client and server to communicate.)

3. (Optional) Configure the local database, if used.

add new users

If the local database and TACACS+ are both configured, it is recommended to configure the same user names in both TACACS+ and the local database. This will allow the users to access the SCE platform in case of TACACS+ server failure.


Note If TACACS+ is used as the login method, the TACACS+ username is used automatically in the enable command. Therefore, it is important to configure the same usernames in both TACACS+ and the local database so that the enable command can recognize this username.


specify the password

define the privilege level

4. Configure the authentication methods on the SCE platform.

login authentication methods

privilege level authorization methods

5. Review the configuration.

Use the " show running-config" command to view the configuration.

How to Configure the SCE Platform TACACS+ Client

Configuring the SCE Platform TACACS+ Client 

How to Add a new TACACS+ Server Host 

How to Remove a TACACS+ Server Host 

How to Configure the Global Default Key 

How to Configure the Global Default Timeout 

Configuring the SCE Platform TACACS+ Client

The user must configure the remote servers for the TACACS+ protocol. Then the SCE platform TACACS+ client must be configured to work with the TACACS+ servers. The following information must be configured:

TACACS+ server hosts definition — a maximum of three servers is supported.

For each sever host, the following information can be configured:

hostname (required)

port

encryption key

timeout interval

Default encryption key (optional) — A global default encryption key may be defined. This key is defined as the key for any server host for which a key is not explicitly configured when the server host is defined.

If the default encryption key is not configured, a default of no key is assigned to any server for which a key is not explicitly configured.

Default timeout interval (optional) — A global default timeout interval may be defined. This timeout interval is defined as the timeout interval for any server host for which a timeout interval is not explicitly configured when the server host is defined.

If the default timeout interval is not configured, a default of five seconds is assigned to any server for which a timeout interval is not explicitly configured.

The procedures for configuring the SCE platform TACACS+ client are explained in the following sections:

How to Monitor Management Interface IP Filtering 

How to Remove a TACACS+ Server Host 

How to Configure the Global Default Key 

How to Configure the Global Default Timeout 

How to Add a new TACACS+ Server Host

Use this command to define a new TACACS+ server host that is available to the SCE platform TACACS+ client.

The Service Control solution supports a maximum of three TACACS+ server hosts. 

Options

The following options are available:

host-name — name of the server

port number — TACACS+ port number

Default = 49

timeout interval — time in seconds that the server waits for a reply from the server host before timing out

Default = 5 seconds or user-configured global default timeout interval (see How to Define the Global Default Timeout.)

key-string — encryption key that the server and client will use when communicating with each other. Make sure that the specified key is actually configured on the TACACS+ server host.

Default = no key or user-configured global default key (see How to Define a Global Default Key.)


Step 1 From the SCE(config)# prompt, type TACACS-server host host-name[port portnumber] [timeout timeout-interval] [key key-string] and press Enter.


How to Remove a TACACS+ Server Host  

Options

The following options are available:

host-name — name of the server to be deleted


Step 1 From the SCE(config)# prompt, type no TACACS-server host host-nameand press Enter.


How to Configure the Global Default Key

Use this command to define the global default key for the TACACS+ server hosts. This default key can be overridden for a specific TACACS+ server host by explicitly configuring a different key for that TACACS+ server host.

Options 

How to Define a Global Default Key 

How to Clear the Global Default Key 

Options

The following options are available:

key-string — default encryption key that all TACACS servers and clients will use when communicating with each other. Make sure that the specified key is actually configured on the TACACS+ server hosts.

Default = no encryption

How to Define a Global Default Key


Step 1 From the SCE(config)# prompt, type TACACS-server key key-stringand press Enter.


How to Clear the Global Default Key


Step 1 From the SCE(config)# prompt, type no TACACS-server key and press Enter.

No global default key is defined. Each TACACS+ server host may still have a specific key defined. However, any server host that does not have a key explicitly defined (uses the global default key) is now configured to use no key.


How to Configure the Global Default Timeout

Use this command to define the global default timeout interval for the TACACS+ server hosts. This default timeout interval can be overridden for a specific TACACS+ server host by explicitly configuring a different timeout interval for that TACACS+ server host.

Options 

How to Define the Global Default Timeout 

How to Clear the Global Default Timeout 

Options

The following options are available:

timeout interval — default time in seconds that the server waits for a reply from the server host before timing out.

Default = 5 seconds

How to Define the Global Default Timeout


Step 1 From the SCE(config)# prompt, type TACACS-server timeout timeout-intervaland press Enter.


How to Clear the Global Default Timeout


Step 1 From the SCE(config)# prompt, type no TACACS-server timeout and press Enter.

No global default timeout interval is defined. Each TACACS+ server host may still have a specific timeout interval defined. However, any server host that does not have a timeout interval explicitly defined (uses the global default timeout interval) is now configured to a five second timeout interval.


How to Manage the User Database

TACACS+ maintains a local user database. Up to 100 users can be configured in this local database, which includes the following information for all users:

Username

Password — may configured as encrypted or unencrypted

Privilege level

The procedures for managing the local user database are explained in the following sections:

How to Add a New User to the Local Database 

How to Define the User Privilege Level 

How to Add a New User with Privilege Level and Password 

How to Delete a User 

How to Add a New User to the Local Database

Use these commands to add a new user to the local database. Up to 100 users may be defined.

Options 

How to Add a User with a Clear Text Password 

How to Add a User with No Password 

How to Add a User with an MD5 Encrypted Password Entered in Clear Text 

How to Add a User with an MD5 Encrypted Password Entered as an MD5 Encrypted String 

Options

The password is defined with the username. There are several password options:

No password — Use the nopassword keyword.

Password — Password is saved in clear text format in the local list.

Use the passwordparameter.

Encrypted password — Password is saved in encrypted (MD5) form in the local list. Use the secret keyword.

Password may be defined by either of the following methods:

Specify a clear text password, which is saved in MD5 encrypted form

Specify an MD5 encryption string, which is saved as the user MD5-encrypted secret password

The following options are available:

name — name of the user to be added

password — a clear text password. May be saved in the local list in either of two formats:

as clear text

in MD5 encrypted form if the secret keyword is used

encrypted-secret — an MD5 encryption string password

The following keywords are available:

nopassword — There is no password associated with this user

secret — the password is saved in MD5 encrypted form. Use with either of the following keywords to indicate the format of the password as entered in the command:

0 — use with the password option to specify a clear text password that will be saved in MD5 encrypted form

5 — use with the encrypted-secret option to specify an MD5 encryption string that will be saved as the user MD5-encrypted secret password

How to Add a User with a Clear Text Password


Step 1 From the SCE(config)# prompt, type username namepassword passwordand press Enter.


How to Add a User with No Password


Step 1 From the SCE(config)# prompt, type username namenopassword and press Enter.


How to Add a User with an MD5 Encrypted Password Entered in Clear Text


Step 1 From the SCE(config)# prompt, type username namesecret 0 passwordand press Enter.


How to Add a User with an MD5 Encrypted Password Entered as an MD5 Encrypted String


Step 1 From the SCE(config)# prompt, type username namesecret 5 encrypted-secretand press Enter.


How to Define the User Privilege Level

About the User Privilege Level 

Options 

About the User Privilege Level

Privilege level authorization in the SCE platform is accomplished by the use of an " enable" command authentication request. When a user requests an authorization for a specified privilege level, by using the " enable" command, the SCE platform sends an authentication request to the TACACS+ server specifying the requested privilege level. The SCE platform grants the requested privilege level only after the TACACS+ server authenticates the " enable" command password and verifies that the user has sufficient privileges the enter the requested privilege level.

Options

The following options are available:

name — name of the user whose privilege level is set

level — the privilege level permitted to the specified user. These levels correspond to the CLI authorization levels, which are entered via the enablecommand:

0 — User

10 — Admin

15 (default) — Root


Step 1 SFrom the SCE(config)# prompt, type username nameprivilege leveland press Enter.


How to Add a New User with Privilege Level and Password

Use these commands to define a new user, including password and privilege level, in a single command.


Note In the config files ( running config and startup config ), this command will appear as two separate commands.


Options 

How to Add a User with a Privilege Level and a Clear Text Password 

How to Add a User with a Privilege Level and an MD5 Encrypted Password Entered in Clear Text 

How to Add a User with a Privilege Level and an MD5 Encrypted Password Entered as an MD5 Encrypted String 

Options

The following options are available:

name — name of the user whose privilege level is set

level — the privilege level permitted to the specified user. These levels correspond to the CLI authorization levels, which are entered via the enablecommand:

0 — User

10 — Admin

15 (default) — Root

password — a clear text password. May be saved in the local list in either of two formats:

as clear text I

n MD5 encrypted form if the secret keyword is used

encrypted-secret — an MD5 encryption string password

The following keywords are available:

secret — the password is saved in MD5 encrypted form. Use with either of the following keywords to indicate the format of the password as entered in the command:

0 — use with the password option to specify a clear text password that will be saved in MD5 encrypted form

5 = use with the encrypted-secret option to specify an MD5 encryption string that will be saved as the user MD5-encrypted secret password

How to Add a User with a Privilege Level and a Clear Text Password


Step 1 From the SCE(config)# prompt, type username nameprivilege levelpassword passwordand press Enter.


How to Add a User with a Privilege Level and an MD5 Encrypted Password Entered in Clear Text


Step 1 From the SCE(config)# prompt, type username nameprivilege levelsecret 0 passwordand press Enter.


How to Add a User with a Privilege Level and an MD5 Encrypted Password Entered as an MD5 Encrypted String


Step 1 From the SCE(config)# prompt, type username nameprivilege levelsecret 5 encrypted-secretand press Enter.


How to Delete a User

Options 

Options

The following options are available:

name — name of the user to be deleted


Step 1 From the SCE(config)# prompt, type no username nameand press Enter.


How to Configure AAA Login Authentication

There are two features to be configured for login authentication:

Maximum number of permitted Telnet login attempts

The authentication methods used at login (see General AAA Fallback and Recovery Mechanism.)

The procedures for configuring login authentication are explained in the following sections:

Configuring Maximum Login Attempts 

How to Configure the Login Authentication Methods 

Configuring Maximum Login Attempts

Use this command to set the maximum number of login attempts that will be permitted before the session is terminated.

Options 

Options

The following options are available:

number-of-attempts — The maximum number of login attempts that will be permitted before the telnet session is terminated.

This is relevant only for Telnet sessions. From the local console, the number of re-tries is unlimited.

Default = three


Step 1 From the SCE(config)# prompt, type aaa authentication attempts login number-of-attemptsand press Enter..


How to Configure the Login Authentication Methods

You can configure "backup" login authentication methods to be used if failure of the primary login authentication method (see General AAA Fallback and Recovery Mechanism ).

Use this command to specify which login authentication methods are to be used, and in what order of preference.

Options 

How to Specify the Login Authentication Methods 

How to Delete the Login Authentication Methods List 

Options

The following options are available:

method — the login authentication methods to be used. You may specify up to four different methods, in the order in which they are to be used.

group TACACS+ — Use TACACS+ authentication.

local — Use the local username database for authentication

enable (default) — Use the " enable" password for authentication

none — Use no authentication.

How to Specify the Login Authentication Methods


Step 1 From the SCE(config)# prompt, type aaa authentication login default method1 [method2...] and press Enter.

You may list a maximum of four methods; all four methods explained above. List them in the order of priority.


How to Delete the Login Authentication Methods List


Step 1 From the SCE(config)# prompt, type no aaa authentication login default and press Enter.

If the login authentication methods list is deleted, the default login authentication method only (enable password) will be used. TACACS+ authentication will not be used.


How to Configure AAA Privilege Level Authorization Methods

Options 

How to Specify AAA Privilege Level Authorization Methods 

How to Delete the AAA Privilege Level Authorization Methods List 

Options

The following options are available:

method — the login authorization methods to be used. You may specify up to four different methods, in the order in which they are to be used.

group TACACS+ — Use TACACS+ authorization.

local — Use the local username database for authorization

enable (default) — Use the " enable" password for authorization

none — Use no authorization.

How to Specify AAA Privilege Level Authorization Methods


Step 1 From the SCE(config)# prompt, type aaa authentication enable default method1 [method2...] and press Enter.

You may list a maximum of four methods; all four methods explained above. List them in the order of priority.


How to Delete the AAA Privilege Level Authorization Methods List


Step 1 From the SCE(config)# prompt, type no aaa authentication enable default and press Enter.

If the privilege level authorization methods list is deleted, the default login authentication method only (enable password) will be used. TACACS+ authentication will not be used.


How to Configure AAA Accounting

Use this command to enable or disable TACACS+ accounting.

About AAA Accounting 

Options 

How to Enable AAA Accounting 

How to Disable AAA Accounting 

About AAA Accounting

If TACACS+ accounting is enabled, the SCE platform sends an accounting message to the TACACS+ server after every command execution. The accounting message is logged in the TACACS+ server for the use of the network administrator.

By default, TACACS+ accounting is disabled.

Options

The following options are available:

level — The privilege level for which to enable the TACACS+ accounting

How to Enable AAA Accounting


Step 1 From the SCE(config)# prompt, type aaa authentication accounting commands leveldefault stop-start group TACACS+ and press Enter.

The start-stop keyword (required) indicates that the accounting message is sent at the beginning and the end (if the command was successfully executed) of the execution of a CLI command.


How to Disable AAA Accounting


Step 1 From the SCE(config)# prompt, type aaa authentication accounting commands leveldefault and press Enter.


How to Monitor TACACS+ Servers

Use these commands to display statistics for the TACACS+ servers.

How to Display Statistics for TACACS+ Servers 

How to Display Statistics, Keys and Timeouts for TACACS+ Servers 

How to Display Statistics for TACACS+ Servers


Step 1 From the SCE# prompt, type show TACACS and press Enter.


How to Display Statistics, Keys and Timeouts for TACACS+ Servers


Step 1 From the SCE# prompt, type show TACACS all and press Enter.

Note that, although most show commands are accessible to viewer level users, the ' all ' option is available only at the admin level. Use the command ' enable 10' to access the admin level.


How to Monitor TACACS+ Users

Use this command to display the users in the local database, including passwords.


Step 1 From the SCE# prompt, type show users and press Enter.

Note that, although most show commands are accessible to viewer level users, this command is available only at the admin level. Use the command ' enable 10' to access the admin level.


How to Configure Access Control Lists (ACLs)

About Access Control Lists 

Options 

How to Add Entries to an ACL 

How to Remove an ACL 

How to Define a Global ACL 

About Access Control Lists

The SCE platform can be configured with Access Control Lists (ACLs), which are used to permit or deny incoming connections on any of the management interfaces. An access list is an ordered list of entries, each consisting of an IP address and an optional wildcard "mask" defining an IP address range, and a permit/deny field.

The order of the entries in the list is important. The default action of the first entry that matches the connection is used. If no entry in the Access List matches the connection, or if the Access List is empty, the default action is deny.

Configuration of system access is done in two stages:

1. Creating an access list. ( How to Add Entries to an ACL ).

2. Associating the access list with a management interface. (See How to Define a Global ACL and How to Assign an ACL to the Telnet Interface.)

Creating an access list is done entry by entry, from the first to the last.

When the system checks for an IP address on an access list, the system checks each line in the access list for the IP address, starting at the first entry and moving towards the last entry. The first match that is detected (that is, the IP address being checked is found within the IP address range defined by the entry) determines the result, according to the permit/deny flag in the matched entry. If no matching entry is found in the access list, access is denied.

You can create up to 99 access lists. Access lists can be associated with system access on the following levels:

Global (IP) level. If a global list is defined using the ip access-class command, when a request comes in, the SCE platform first checks if there is permission for access from that IP address. If not, the SCE does not respond to the request. Configuring the SCE platform to deny a certain IP address would preclude the option of communicating with that address using any IP-based protocol including Telnet, FTP, ICMP and SNMP. The basic IP interface is low-level, blocking the IP packets before they reach the interfaces.

Interface level. Access to each management interface (Telnet, SNMP, etc.) can be restricted to an access list. Interface-level lists are, by definition, a subset of the Global list defined. If access is denied at the global level, the IP will not be allowed to access using one of the interfaces. Once an access list is associated with a specific management interface, that interface checks the access list to find out if there is permission for a specific external IP address trying to access the management interface.

It is possible to configure several management interfaces to the same access list, if this is the desired behavior of the SCE platform.

If no ACL is associated to a management interface or to the global IP level, access is permitted from all IP addresses.


Note The SCE Platform will respond to pingcommands only from IP addresses that are allowed access. Pings from a non-authorized address will not receive a response from the SCE platform, as ping uses ICMP protocol.


Options

The following options are available:

number — the ID number assigned to the Access Control List

ip-address — the IP address of the interface to be permitted or denied. Enter in x.x.x.x format.

ip-address/mask — configures a range of addresses in the format x.x.x.x y.y.y.y where x.x.x.x specifies the prefix bits common to all IP addresses in the range, and y.y.y.y is a wildcard-bits mask specifying the bits that are ignored. In this notation, `0' means bits to ignore.

The following keywords are available:

permit — the specified IP addresses have permission to access the SCE platform.

deny — the specified IP addresses are denied access to the SCE platform.

How to Add Entries to an ACL

Adding Entries to an ACL: Example 


Step 1 Type configure and press Enter.

Enables Global Configuration mode.

Step 2 Enter the desired IP address or addresses.

To configure one IP address type:

access-list number permit|deny ip-addressand press Enter.

To configure more than one IP address type:

access-list number permit|deny ip-address/maskand press Enter.

When you add a new entry to an ACL, it is always added to the end of the list.


Adding Entries to an ACL: Example

The following example adds an entry to the access list number 1, that permits access only to IP addresses in the range of 10.1.1.0-10.1.1.255.

SCE(config)#access-list 1 permit 10.1.1.0 0.0.0.255

How to Remove an ACL

Use this command to remove an ACL with all its entries.


Step 1 From the SCE(config)# prompt, type no access-list number, and press Enter.

Removes the specified ACL with all its entries.


How to Define a Global ACL

A global ACL for permits or denies all traffic to the SCE platform.


Step 1 From the SCE(config)# prompt, type ip access-class number, and press Enter.

Applies the specified ACL to all traffic attempting to access the SCE platform, rather than to a specific type of traffic, such as Telnet traffic.


How to Configure the Telnet Interface

About the Telnet Interface 

How to Prevent Telnet Access 

How to Assign an ACL to the Telnet Interface 

How to Configure the Telnet Timeout 

About the Telnet Interface

This section discusses the Telnet interface of the SCE platform. A Telnet session is the most common way to connect to the SCE platform CLI interface.

You can set the following parameters for the Telnet interface:

Enable/disable the interface

Assign an ACL to permit or deny incoming connections.

Timeout for Telnet sessions, that is, if there is no activity on the session, how long the SCE platform waits before automatically cutting off the Telnet connection.

The following commands are relevant to Telnet interface:

access-class in

line vty

[no] access list

[no] service telnetd

[no] timeout

show line vty access-class in

show line vty timeout

How to Prevent Telnet Access

Use this command to disable access by Telnet altogether.


Step 1 From the SCE(config)# prompt, type no service telnetd , and press Enter.

Current Telnet sessions are not disconnected, but no new Telnet sessions are allowed.


How to Assign an ACL to the Telnet Interface

Assigning an ACL to the Telnet Interface: Example 


Step 1 From the SCE(config)# prompt, type line vty 0 , and press Enter.

Enables Line Configuration mode.

Step 2 Type access-class acl-numberin.

acl-number is the ID number of an existing access list.


Assigning an ACL to the Telnet Interface: Example

The following example shows how to assign ACL #1 to the Telnet interface.

SCE#configure 
SCE(config)#line vty 0 
SCE(config-line)#access-class 1 in

How to Configure the Telnet Timeout

The SCE platform supports timeout of inactive Telnet sessions.

Options 

Options

The following options are available:

timeout — The length of time in minutes before an inactive Telnet session will be timed-out.

Default — 30 minutes


Step 1 From the SCE(config-line)# prompt, type timeout timeout, and press Enter.


How to Configure the SSH Server

Information About the SSH Server 

How to Manage the SSH Server 

How to Monitor the Status of the SSH Server 

Information About the SSH Server

The SSH Server 

Key Management 

The SSH Server

A shortcoming of the standard telnet protocol is that it transfers password and data over the net unencrypted, thus compromising security. Where security is a concern, using a Secure Shell (SSH) server rather than telnet is recommended.

An SSH server is similar to a telnet server, but it uses cryptographic techniques that allow it to communicate with any SSH client over an insecure network in a manner which ensures the privacy of the communication. CLI commands are executed over SSH in exactly the same manner as over telnet.

The SSH server supports both the SSH-1 and SSH-2 protocols.

An Access Control List (ACL) can be configured for SSH as for any other management protocol, limiting SSH access to a specific set of IP addresses (see How to Configure Access Control Lists (ACLs) ).

Key Management

Each SSH server should define a set of keys (DSA2, RSA2 and RSA1) to be used when communicating with various clients. The key sets are pairs of public and private keys. The server publishes the public key while keeping the private key in non-volatile memory, never transmitting it to SSH clients. Note that the keys are kept on the tffs0 file system, which means that a person with knowledge of the `enable' password can access both the private and public keys. The SSH server implementation provides protection against eavesdroppers who can monitor the management communication channels of the SCE platform, but it does not provide protection against a user with knowledge of the `enable' password.

Key management is performed by the user via a special CLI command. A set of keys must be generated at least once before enabling the SSH server.

Size of the encryption key is always 2048 bits.

How to Manage the SSH Server

Use these commands to manage the SSH server. These commands are described in the following sections:

How to Generate a Set of SSH Keys 

How to Enable the SSH Server 

How to Disable the SSH Server 

How to Assign an ACL to the SSH Server 

How to Remove the ACL Assignment from the SSH Server 

How to Delete the Existing SSH Keys 

How to Generate a Set of SSH Keys

Remember that you must generate a set of SSH keys before you enable the SSH server.


Step 1 From the SCE(config)# prompt, type ip ssh key generate and press Enter.

Generates a new SSH key set and immediately saves it to non-volatile memory. (Key set is not part of the configuration file). Key size is always 2048 bits.


How to Enable the SSH Server


Step 1 From the SCE(config)# prompt, type ip ssh and press Enter.


How to Disable the SSH Server


Step 1 From the SCE(config)# prompt, type no ip ssh and press Enter.


How to Assign an ACL to the SSH Server


Step 1 From the SCE(config)# prompt, type ip ssh access-class acl-numberand press Enter.

Assigns the specified ACL to the SSH server, so that access the SSH server is limited to the IP addresses defined in the ACL.


How to Remove the ACL Assignment from the SSH Server


Step 1 From the SCE(config)# prompt, type no ip ssh access-class and press Enter.

Removes the ACL assignment from the SSH server, so that any IP address may now access the SSH server.


How to Delete the Existing SSH Keys


Step 1 From the SCE(config)# prompt, type ip ssh key remove and press Enter.

Removes the existing SSH key set from non-volatile memory.

If the SSH server is currently enabled, it will continue to run, since it only reads the keys from non-volatile memory when it is started. However, if the startup-configuration specifies that the SSH server is enabled, the SCE platform will not be able to start the SSH server on startup if the keys have been deleted. To avoid this situation, after executing this command, always do one of the following before the SCE platform is restarted (using reload):

Generate a new set of keys.

Disable the SSH server and save the configuration.


How to Monitor the Status of the SSH Server

Use this command to monitor the status of the SSH sever, including current SSH sessions.


Step 1 From the SCE>prompt, type show ip ssh and press Enter.

This is a User Exec command. Make sure that you are in User Exec command mode by exiting any other modes.


Enabling the SNMP Interface

Use this command to enable the SNMP interface. For more information on configuring and managing the SNMP parameters, including hosts, communities, contact, location, and trap destination hosts, see How to Configure and Manage the SNMP Interface.

How to Enable the SNMP Interface 

How to Disable the SNMP Interface 

How to Enable the SNMP Interface

Options 

Options

The following options are available:

community-string — a security string that identifies a community of managers who are permitted to access the SNMP server


Step 1 From the SCE(config)# prompt, type snmp-server community community-stringand press Enter.

You must define at least one community string to allow SNMP access. For complete information on community strings see How to Configure SNMP Community Strings.


How to Disable the SNMP Interface


Step 1 From the SCE(config)# prompt, type no snmp-server and press Enter.


How to Configure and Manage the SNMP Interface

Information About the SNMP Interface 

How to Configure SNMP Community Strings 

How to Configure SNMP Notifications 

Information About the SNMP Interface

This section explains how to configure the SNMP agent parameters. It also provides a brief overview of SNMP notifications and the supported MIBs, and explains the order in which the MIB must be loaded.

The SNMP Interface 

SNMP Protocol 

Security Considerations 

Information About CLI 

Information About MIBs 

Configuration via SNMP 

The SNMP Interface

The SCE platform operating system includes a Simple Network Management Protocol (SNMP) agent that supports the following:

RFC 1213 standard (MIB-II)

RFC 2737 standard (ENTITY-MIB version 2)

pcube enterprise MIBs

SNMP Protocol

SNMP (Simple Network Management Protocol) is a set of protocols for managing complex networks. SNMP works by sending messages, called protocol data units (PDUs), to different parts of a network. SNMP-compliant devices, called agents, store data about themselves in Management Information Bases (MIBs) and return this data to the SNMP requesters.

SCE platform supports the original SNMP protocol (also known as SNMPv1), and a newer version called Community-based SNMPv2 (also known as SNMPv2C).

SNMPv1 — is the first version of the Simple Network Management Protocol, as defined in RFCs 1155 and 1157, and is a full Internet standard. SNMPv1 uses a community-based form of security.

SNMPv2c — is the revised protocol, which includes improvements to SNMPv1 in the areas of protocol packet types, transport mappings, and MIB structure elements but using the existing SNMPv1 administration structure. It is defined in RFC 1901, RFC 1905, and RFC 1906.

SCE platform implementation of SNMP supports all MIB II variables, as described in RFC 1213, and defines the SNMP traps using the guidelines described in RFC 1215.

The SNMPv1 and SNMPv2C specifications define the following basic operations that are supported by SCE platform:

Table 5-2 Request Types

Request Type

Description

Remarks

Set Request

Writes new data to one or more of the objects managed by an agent.

Set operations immediately affect the SCE platform running-config but do not affect the startup config

Get Request

Requests the value of one or more of the objects managed by an agent.

 

Get Next Request

Requests the Object Identifier(s) and value(s) of the next object(s) managed by an agent.

 

Get Response

Contains the data returned by an agent.

 

Trap

Sends an unsolicited notification from an agent to a manager, indicating that an event or error has occurred on the agent system

SCE platform may be configured to send either SNMPv1 or SNMPv2 style traps.

Get Bulk Request

Retrieves large amounts of object information in a single Request / response transaction. GetBulk behaves as if many iterations of GetNext request/responses were issued, except that they are all performed in a single request/response.

This is newly defined SNMPv2c message.


Security Considerations

By default, the SNMP agent is disabled for both read and write operations. When enabled, SNMP is supported over the management port only (in-band management is not supported).

In addition, the SCE platform supports the option to configure community of managers for read-write accessibility or for read-only accessibility. Furthermore, an ACL (Access List) may be associated with a community to allow SNMP management to a restricted set of managers IP addresses.

Information About CLI

CLI 

CLI Commands for Configuring SNMP 

CLI Commands for Monitoring SNMP 

CLI

The SCE platform supports the CLI commands that control the operation of the SNMP agent. All the SNMP commands are available in Admin authorization level. The SNMP agent is disabled by default and any SNMP configuration command enables the SNMP agent (except where there is an explicit disable command).

CLI Commands for Configuring SNMP

Following is a list of CLI commands available for configuring SNMP. These are Global Configuration mode commands.

snmp-server enable

no snmp-server

[no] snmp-server community [all] [

no | default] snmp-server enable traps

[no] snmp-server host [all]

[no] snmp-server contact

[no] snmp-server location

CLI Commands for Monitoring SNMP

Following is a list of CLI commands available for monitoring SNMP. These are Viewer mode commands, and are available when the SNMP agent is enabled:

show snmp (also available when SNMP agent is disabled)

show snmp community

show snmp contact

show snmp enabled

show snmp host

show snmp location

show snmp mib

show snmp traps

Information About MIBs

MIBs 

MIB Data Objects 

Information About MIB-II 

Information About ENTITY-MIB 

Information About pcube Enterprise MIB 

MIBs

MIBs (Management Information Bases) are databases of objects that can be monitored by a network management system (NMS). SNMP uses standardized MIB formats that allow any SNMP tools to monitor any device defined by a MIB.

The SCE platform supports the following MIBs:

Standard MIBs:

MIB-II (as defined in RFC 1213, Management Information Base for Network Management of TCP/IP-based Internets) and some of its extensions.

ENTITY-MIB version 2 (as defined in RFC 2737)

Proprietary MIBs - Pcube enterprise MIBs defined by Cisco, for the Cisco Service Control products (see Appendix B, "Proprietary MIB Reference".).

Pcube enterprise MIB (pcube) can be divided into different kinds of MIBs:

Proprietary SCOS MIBs - These MIBs contain platform specific information. They also contain the generic definitions of the pcube subtree.

The SE MIB and the Dispatcher MIB are two examples of OS MIBs.

Proprietary Application MIB(s) - These MIBs contain application specific information.

Currently, there is one application MIB - Engage MIB.

Proprietary Common MIB(s) - These MIBs contain functionality that is common across more than a single Cisco platform.

Currently there is one common MIB - configuration copy MIB.

Since the acquisition of P-cube, Inc by Cisco Systems, Inc , the existing proprietary MIBs have undergone a process of updating to make them conform to Cisco standards. Note that all Pcube MIBs since SCOS version 3.0.3 are compiled using SMICNG and are in conformation with Cisco standards and styling.


Note While the designations "Pcube" and "SC" have been retained in the MIB for the sake of consistency, they refer to the corresponding Cisco SCE products.


MIB Data Objects

The data objects that make up the MIB may be identified in two ways:

OID (Object Identifier) — The unique string that describes a specific data object in the agent database.

OIDs are written in dotted format such as: 1.3.6.1.4.1.5655.4.1.10.1

MIB descriptor — A name defined in the MIB file for the OID. It is often used instead of the explicit OID.

For instance: "ifTable" stands for the OID of the MIB-II interface table.

Information About MIB-II

MIB-II 

IF-MIB 

MIB-II

SCE platform fully supports MIB-II (RFC1213), including the following groups

System Interface (for both the management and line ports) AT (management port) IP (management port) ICMP (management port)

TCP (management port)

UDP (management port)

SNMP (management port)

IF-MIB

The MIB-II standard has been extended by several different MIBs. The SCOS supports the IF-MIB, defined in RFC-2233.

The IF-MIB defines the following four tables:

iftable

An update to the MIB-II ifTable

ifxtable

An addition to the ifTable, intended for high capacity interfaces

ifStackTable

A table containing information about sublayers of interfaces

ifRcvAddressTable

A table meant for interfaces that support more than one receive address


These are the details of specific objects in this MIB:

ifindex

The numbering of the interfaces is such that the port(s) come first.

ifPhysAddress

For Management interfaces, this is the MAC address.

For traffic interfaces, this is an all zeros address.

IfAdminStatus

Write operation to this object is not supported. This is OK according to Ethernet MIB RFC2665 section 3.2.7

IfOutQLen

Always returns 0.

Under ifXTable: ifname

The same as ifDescr.

ifpromiscuousmode

Management interface - "false".

Traffic interfaces - "true".

ifRcvAddressTable

Not implemented

iftesttable

Was deprecated by RFC-2233, and is therefore not implemented


Information About ENTITY-MIB

ENTITY-MIB 

entityPhysical group 

entityGeneral group 

ENTITY-MIB

The Entity-MIB contains five groups of MIB objects:

entityPhysical group

entityLogical group

entityMapping group

entityGeneral group

entityNotifications group

The SCOS implements only the physical and the general groups of the Entity-MIB, since the other groups are not relevant to the SCE platform.

entityPhysical group

The entityPhysical group describes the physical entities managed by a single agent. It contains a single table, the entPhysicalTable , that identifies physical system components.

These are the details of specific objects in the entPhysicalTable , as implemented in SCOS:

entPhysicalIndex (1)

1 (SCE main board)

entPhysicalDescr (2)

The description corresponding to the Product ID, as it appears in the product catalog.

entPhysicalVendorType (3)

cevChassisSCE2000 = {cevChassis 511} (1.3.6.1.4.1.9.12.3.1.3.511)

cevChassisSCE1000 = {cevChassis 512} (1.3.6.1.4.1.9.12.3.1.3.512)

entPhysicalContainedIn (4)

0 (not contained)

entPhysicalClass (5)

3 (chassis)

entPhysicalParentRelPos (6)

1

entPhysicalName (7)

"Chassis"

entPhysicalHardwareRev (8)

Version ID, as identified in EPROM

entPhysicalFirmwareRev (9)

empty string

entPhysicalSoftwareRev (10)

Software version, as seen in "show version"

entPhysicalSerialNum (11)

Serial number, as identified in EPROM

entPhysicalMfgName (12)

"Cisco Systems, inc."

entPhysicalModelName (13)

Product ID, as identified in EPROM

entPhysicalAlias (14)

empty string

entPhysicalAssetID (15)

empty string

entPhysicalIsFRU (16)

2 (false)


entityGeneral group

The entityGeneral group contains general information relating to the other object groups. The entGeneral group contains a single scalar object.

These are the details of specific object in the entityGeneral group, as implemented in SCOS:

entLastChangeTime

sysUpTime. This reflects the fact that the entries in the Entity-MIB do not change in the SCE platform after their creation at boot time.


Information About pcube Enterprise MIB

pcube Enterprise MIB 

Loading the MIB Files 

pcube Enterprise MIB

The SCE proprietary pcube MIB enables external management systems to retrieve general information regarding the SCE platform operating status and resources utilization, extract real time measurements of bandwidth utilization and network statistics, and receive notifications of critical events and alarms.


Note The following object identifier represents the pcube Enterprise MIB:



Note 1.3.6.1.4.1.5655, or iso.org.dod.internet.private.enterprise.pcube


The pcube Enterprise MIB splits into four main groups:

Products

Modules

Management

Workgroup

The pcube enterprise tree structure is defined in a MIB file named pcube.mib .

Refer to Appendix B, "Proprietary MIB Reference"for a complete description of the pcube enterprise MIB.

The figure below illustrates the pcube Enterprise MIB structure. Conventions used in the diagram:

Dotted arrows surrounding a unit or units indicate that the component is described in the MIB file specified below the line.

A shadowed box indicates that the component is described in its own MIB file.

Figure 5-1

pcubeProducts subtree — contains the OIDs of Cisco Service Control products.

pcubeModules subtree — provides a root object identifier under which MIB modules can be defined.

pcubeMgmt subtree — the root for pcube MIBs that are relevant to multiple products.

pcubeConfigCopyMIB — a subset of the Cisco Config-Copy-MIB that supports local copying of running config to startup config.

pcubeWorkgroups subtree — contains the actual MIBs for Cisco Service Control devices and sub-devices.

pcubeSeMIB — comprises two branches:

pcubeSeEvents — Contains the OIDs used for sending enterprise-specific notifications.

pcubeSEObjs — Contains the OIDs that belong to the SCE platform, divided into groups according to functionality.

Loading the MIB Files

The Service Control proprietary MIB uses definitions that are defined in other MIBs, such as pcube MIB ( pcube.mib ), and the SNMPv2.mib . Therefore, the order in which the MIBs are loaded is important. To avoid errors, the MIBs must be loaded in the proper order.

1. Load SNMPv2.my .

2. Load SNMP-FRAMEWORK-MIB.my .

3. Load PCUBE-SMI.my .

4. Load PCUBE-SE-MIB.my .


Note Information and proprietary MIB files supported by the SCOS can be downloaded from: http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml under the Cisco Service Routing Products section.


Configuration via SNMP

SCE platform supports a limited set of variables that may be configured via SNMP (read-write variables). Setting a variable via SNMP (as via the CLI) takes effect immediately and affects only the running-configuration. To make this configuration stored for next reboots (startup-configuration) the user must specify it explicitly via CLI or via SNMP using the Cisco enterprise MIB objects (see  ).

It should be noted also that the SCE platform takes the approach of a single configuration database with multiple interfaces that may change this database. Therefore, executing the copy running-config startup-config command via CLI or SNMP makes permanent all the changes made by either SNMP or CLI.

How to Configure SNMP Community Strings

Configuring SNMP Community Strings 

How to Define a Community String 

How to Remove a Community String 

How to Display the Configured Community Strings 

Configuring SNMP Community Strings

To enable SNMP management, you must configure SNMP community strings to define the relationship between the SNMP manager and the agent.

After receiving an SNMP request, the SNMP agent compares the community string in the request to the community strings that are configured for the agent. The requests are valid under the following circumstances:

SNMP Get , Get-next , and Get-bulk requests are valid if the community string in the request matches the read-only community.

SNMP Get , Get-next , Get-bulk and Set requests are valid if the community string in the request matches the agent's read-write community.

How to Define a Community String

Options 

Defining a Community String: Example 

Options

The following options are available:

community-string — a security string that identifies a community of managers who are permitted to access the SNMP server

acl-number — ID number if the Access Control List to be assigned to the SNMP interface. It should list the IP addresses of the SNMP managers permitted to use the community string to gain access to the agent.

If no ACL is specified, all IP addresses can access the agent using the defined community string. For more information about ACLs, see How to Configure Access Control Lists (ACLs) 

The following keywords are available:

ro — read only (default accessibility)

rw — read and write


Step 1 From the SCE(config)# prompt, type snmp-server community community-stringro|rw acl-numberand press Enter.

Repeat the command as necessary to define all community strings.


Defining a Community String: Example

This example shows how to configure a community string called "mycommunity" with read-only rights and access list number "1".

Since read-only isthe default, it does not need to be defined explicitly.

SCE(config)#snmp-server community mycommunity 1

How to Remove a Community String

Removing a Community String: Example 


Step 1 From the SCE(config)# prompt, type no snmp-server community community-stringand press Enter.


Removing a Community String: Example

The following example shows how to remove a community string called "mycommunity".

SCE(config)#no snmp-server community mycommunity

How to Display the Configured Community Strings

Displaying the Configured Community Strings: Example 


Step 1 From the SCE>prompt, type show snmp-server community community-stringand press Enter.


Displaying the Configured Community Strings: Example

The following example shows how to display the configured SNMP communities.

SCE>show snmp community 
Community: public, Access Authorization: RO, Access List Index: 1 
SCE>

How to Configure SNMP Notifications

Use these commands to configure:

The destinations that will receive SNMP notifications (hosts)

Which types of notifications will be sent (traps)

About SNMP Notifications 

How to Define SNMP Hosts 

About SNMP Notifications

Notifications are unsolicited messages that are generated by the SNMP agent that resides inside the SCE platform when an event occurs. When the Network Management System receives the notification message, it can take suitable actions, such as logging the occurrence or ignoring the signal.

By default, the SCE platform is not configured to send any SNMP notifications. You must define the Network Management System to which the SCE platform should send notifications. (See the table below, Configurable Notifications, for a list of configurable notifications). Whenever one of the events that trigger notifications occurs in the SCE platform, an SNMP notification is sent from the SCE platform to the list of IP addresses that you define.

SCE platform supports two general categories of notifications:

Standard SNMP notifications — As defined in RFC1157 and using the conventions defined in RFC1215.

Proprietary SCE enterprise notifications — As defined in the SCE proprietary MIB (see Appendix B, "Notification Types").

After a host or hosts are configured to receive notifications, by default, the SCE platform sends to the host or hosts all the notifications supported by the SCE platform except for the AuthenticationFailure notification. The SCE platform provides the option to enable or disable the sending of this notification, as well as some of the SCE enterprise notifications, explicitly.

SCE platform can be configured to generate either SNMPv1 style or SNMPv2c style notifications. By default, the SCE platforms sends SNMPv1 notifications.

Following are some sample procedures illustrating how to do the following:

Configure hosts (NMS) to which the SNMP agent should send notifications

Remove/disable a host (NMS) from receiving notifications

Enable the SNMP agent to send authentication-failure notifications

Enable the SNMP agent to send enterprise notifications

Reset all notifications to the default setting

How to Define SNMP Hosts

Use this command to define the hosts that will receive notifications from the SCE platform.

Options 

How to Configure the SCE Platform to Send Notifications to a Host (NMS) 

How to Configure the SCE Platform to Stop Sending Notifications to a Host 

How to Configure SNMP Traps 

Options

The following options are available:

ip-address — the IP address of the SNMP server host

community-string — a security string that identifies a community of managers who are permitted to access the SNMP server

version — SNMP version running in the system. Can be set to 1 or 2c.

Default — 1 (SNMPv1)

How to Configure the SCE Platform to Send Notifications to a Host (NMS)

Configuring the SCE Platform to Send Notifications to Multiple Hosts: Example 


Step 1 At the SCE(config)# prompt, type snmp-server host ip-address community-stringand press Enter.

If the version is not specified, SNMPv1 is assumed.

Only one host can be specified per command. To define multiple hosts, execute one command for each host.


Configuring the SCE Platform to Send Notifications to Multiple Hosts: Example

The following example shows how to configure the SCE platform to send SNMPv1 notifications to several hosts.

SCE(config)#snmp-server host 10.10.10.10 mycommunity 
SCE(config)#snmp-server host 20.20.20.20 mycommunity 
SCE(config)#snmp-server host 30.30.30.30 mycommunity 
SCE(config)#snmp-server host 40.40.40.40 mycommunity

How to Configure the SCE Platform to Stop Sending Notifications to a Host

Configuring the SCE Platform to Stop Sending Notifications to a Host: Example 


Step 1 At the SCE(config)# prompt, type no snmp-server host ip-address and press Enter.


Configuring the SCE Platform to Stop Sending Notifications to a Host: Example

The following example shows how to remove the host with the IP Address: "192.168.0.83".

SCE(config)#no snmp-server host 192.168.0.83

How to Configure SNMP Traps

Use this command to configure the notifications that will be sent to the defined host.

Options 

How to Enable the SNMP Server to Send Authentication Failure Notifications 

How to Enable the SNMP Server to Send All Enterprise Notifications 

How to Enable the SNMP Server to Send a specific Enterprise Notification 

How to Restore All Notifications to the Default Status 

Options

The following options are available:

snmp — optional parameter that specifies that all or specific snmp traps should be enabled or disabled.

By default, snmp traps are disabled.

snmp trap name — optional parameter that specifies a specific snmp trap that should be enabled or disabled.

Currently the only accepted value for this parameter is Authentication .

enterprise — optional parameter that specifies that all or specific enterprise traps should be enabled or disabled.

By default, enterprise traps are enabled.

enterprise trap name — optional parameter that specifies a specific snmp trap that should be enabled or disabled.

Values: attack, chassis, link-bypass, logger, operational-status, port-operational-status, pull-request-failure, RDR-formatter, session, SNTP, subscriber, system-reset, telnet, vas-traffic-forwarding

Use these parameters as follows:

To enable/disable all traps of one type: Specify only snmp or enterprise .

To enable/disable only one specific trap: Specify snmp or enterprise with the additional trap name parameter naming the desired trap.

To enable/disable all traps: Do not specify either snmp or enterprise .

How to Enable the SNMP Server to Send Authentication Failure Notifications


Step 1 At the SCE(config)# prompt, type snmp-server enable traps snmp authentication and press Enter.


How to Enable the SNMP Server to Send All Enterprise Notifications


Step 1 At the SCE(config)# prompt, type snmp-server enable traps enterprise and press Enter.


How to Enable the SNMP Server to Send a specific Enterprise Notification

DETAILED STEPS


Step 1 At the SCE(config)# prompt, type snmp-server enable traps enterprise [attack|chassis|link-bypass|logger|operational-status|port-operational-status|pull-request-failure|RDR-formatter|session| SNTP|subscriber|system-reset|telnet|vas-traffic-forwarding]and press Enter.

Specify the desired enterprise trap type.


Enabling the SNMP Server to Send a Specific Enterprise Notification: Example

The following example shows how to configure the SNMP server to send the logger enterprise notification only.

SCE(config)#snmp-server enable traps enterprise logger

How to Restore All Notifications to the Default Status


Step 1 At the SCE(config)# prompt, type default snmp-server enable traps and press Enter.

Resets all notifications supported by the SCE platform to their default status.


How to Manage Passwords

About Passwords 

Changing Your Password 

Password Encryption 

Password Recovery 

About Passwords

Cisco CLI passwords are an access-level authorization setting, not individual user passwords. All Admin users, for example, log in with the same password. This means that the system does not identify you as an individual, but as a user with certain privileges.

Passwords are needed for all authorization levels to prevent unauthorized users from accessing the SCE platform. It is highly recommended that you change the default password upon initial installation, and that you change the passwords periodically to secure the system.


Note The default password for all levels is "Cisco".


When a telnet user logs on, he sees only a Password: prompt, no logo is displayed. This provides extra security by not revealing the system identity to users that do not know the password.

Password guidelines:

Password length must be between 4 and 100 characters long.

Passwords can contain any visible keyboard character.

Passwords must begin with a letter.

Passwords cannot contain spaces.

Passwords are case-sensitive.

Users with Admin or higher authorization level can view the configured passwords using the show running-config or the show startup-configcommands. Therefore, if you want passwords to remain completely confidential, you must activate the encryption feature, described in How to Enable Password Encryption.

Changing Your Password

How to Change Your Password 

Verifying that the Password has been Successfully Changed 

How to Change Your Password

Use the enable passwordcommand to change the password. Note that if the password has been changed, the default password will no longer be accepted.

Options

The following options are available:

level — the number of the authorization level for which the password is defined.

The authorization levels are:

0: user

5: viewer

10: admin

15: root

password — the new password for the specified authorization level.


Step 1 At the SCE(config)# prompt type enable password level level passwordand press Enter.

The Network Administrator should record passwords in a secure location.


Verifying that the Password has been Successfully Changed


Step 1 Initiate a new telnet connection, while maintaining the one you used to set the password.

This is important so that if the verification fails, you would still have admin level authorization to re-enter the password.

Step 2 At the SCE# prompt type enable leveland press Enter.

Specify the level for which you have just changed the password.

Step 3 At the prompt, type your new password and press Enter.

If your new password has been entered successfully, then the appropriate prompt appears.

If you enter an incorrect password, the password prompt will appear again.

Step 4 Repeat these steps as necessary to check additional passwords.

The encryption feature will encrypt the passwords in the platform configuration files.


Password Encryption

About Password Encryption 

How to Enable Password Encryption 

How to Disable Password Encryption 

About Password Encryption

Once the encryption feature is activated, passwords entered into the system are encrypted to the startup configuration file the next time the configuration is saved. When encryption feature is turned off, passwords previously encrypted to the startup configuration file are not deciphered.

By default, the password encryption feature is disabled.

How to Enable Password Encryption


Step 1 From the sce(config)# prompt, type service password encryption and press Enter.


How to Disable Password Encryption


Step 1 From the sce(config)# prompt, type no service password encryption and press Enter.

This does not remove the encryption from the configuration file. You must save to the startup configuration file if you want the password to be stored un-encrypted on the startup configuration file.


Password Recovery

Use the following procedures if it becomes necessary to recover the enablepasswords for the SCE platform. Be sure to use the appropriate procedure depending on the version of SCOS you are using:

How to Recover the Passwords: SCOS versions before 2.5.5 

How to Recover the Passwords: SCOS versions 2.5.5 or later 

How to Recover the Passwords: SCOS versions before 2.5.5

The procedure used for recovering the passwords depends on whether or not there are user-configured parameters that need to be saved.

How to Recover the Passwords: Reverting to Default the Configuration 

How to Recover the Passwords: Saving the Current Configuration 

How to Recover the Passwords: Reverting to Default the Configuration

For SCE platforms running a SCOS version before 2.5.5, you can recover the passwords by simply removing the config.txt file and then rebooting.


Note This procedure resets the configuration of the SCE platform to factory defaults. Therefore, this procedure should be performed only after making sure that no traffic can be affected by the behavior of the SCE platform.



Note This procedure resets the configuration of the SCE platform to factory defaults. Therefore, all current user configuration is lost. To recover the passwords without losing the user configuration, use the procedure described in How to Recover the Passwords: Saving the Current Configuration 


SUMMARY STEPS

1. Connect a serial terminal to the `AUX' port at 9600 baud.

2. Press

3. Enter

4. so that the prompt appears.

5. Type rm "/tffs0/system/config.txt" and press Enter.

6. Type reboot and press Enter.

DETAILED STEPS


Step 1 Connect a serial terminal to the `AUX' port at 9600 baud.

Step 2 Press Enter

Step 3 so that the prompt appears.

Connects to the SCE platform.

Step 4 Type rm "/tffs0/system/config.txt" and press Enter.

Deletes the configuration file, which contains the unknown passwords.

Step 5 Type reboot and press Enter.

Reboot the system to restore the default configuration, including default passwords.


Note To block unauthorized users from connecting to the SCE platform using the default password, a new password should be configured immediately for all levels for which such a password is required. The configuration should be saved (use the CLI command copy running-config startup-config) to make the new passwords permanent.



How to Recover the Passwords: Saving the Current Configuration

Simply deleting the config.txt file, while quick and easy to do, resets the configuration of the SCE platform to factory defaults, replacing all current user configuration. Use this procedure, which saves the configuration file, to recover the passwords without losing the current configuration.


Note Although this procedure does save the current configuration, the process involves a temporary reset of the configuration of the SCE platform to factory defaults. Therefore, this procedure should be performed only after making sure that no traffic can be affected by the behavior of the SCE platform.


SUMMARY STEPS

1. Connect a serial terminal to the `AUX' port at 9600 baud.

2. Press Enter so that the prompt appears.

3. Type cd system and press Enter.

4. Type rename "config.txt" "config2.txt" and press Enter.

5. Type reboot and press Enter.

6. Establish a Telnet session to the SCE platform and enable the admin authorization level.

7. At the SCE# prompt type copy /system/config2.txt ftp:// <user>:<ftp_password>@ip_address/<path>/config2.txt and press Enter.

8. On the workstation, open the file. Look for the lines that start with enable password .

9. At the SCE# prompt , type rename /system/config2.txt /system/config.txt and press Enter.

10. At the SCE# prompt , type reload and press Enter.

DETAILED STEPS


Step 1 Connect a serial terminal to the `AUX' port at 9600 baud.

Step 2 Press Enter so that the prompt appears.

Connects to the SCE platform.

Step 3 Type cd system and press Enter.

Navigates to the system directory.

Step 4 Type rename "config.txt" "config2.txt" and press Enter.

Renames the configuration file so that it will not be lost when the system is rebooted.

Step 5 Type reboot and press Enter.

Reboots the system to reset passwords. The default configuration is restored, in which all passwords are Cisco . This will provide access to the system.

(The IP address configuration remains as it was last configured.)

Step 6 Establish a Telnet session to the SCE platform and enable the admin authorization level.

Use the default password (Cisco).

Step 7 At the SCE# prompt type copy /system/config2.txt ftp:// <user>:<ftp_password>@ip_address/<path>/config2.txt and press Enter.

Copies the file /system/config2.txt to the workstation using the SCE platform FTP client.

Step 8 On the workstation, open the file. Look for the lines that start with enable password .

If passwords are not encrypted, you will be able to see the passwords, and can simply take note of them.

If passwords are encrypted, do the following

a. Edit the file by removing the lines that begin with enable password .

b. Save the file.

c. At the SCE# prompt , type copy ftp:// <user>:<ftp_password>@ip_address/<path>/config2.txt /system/config2.txt and press Enter.

Copies the file from the workstation back to the SCE platform disk space using the SCE platform FTP client.

Step 9 At the SCE# prompt , type rename /system/config2.txt /system/config.txt and press Enter.

Renames the configuration file on the SCE platform back to the original name config.txt .

Step 10 At the SCE# prompt , type reload and press Enter.

Reboots the SCE platform to restore the saved user configuration

If passwords were not encrypted—the user-configured passwords that you viewed in the copied file are restored, since the configuration file was not changed.

If passwords were encrypted—the default password Cisco remains, since the encrypted lines were removed from the configuration file before it was copied back to the SCE platform.

To block unauthorized users from connecting to the SCE platform using the default password, a new password should be configured immediately for all levels for which such a password is required. The configuration should be saved (use the CLI command copy running-config startup-config) to make the new passwords permanent.


How to Recover the Passwords: SCOS versions 2.5.5 or later

In SCOS versions 2.5.5 or later, a specific command is available to restore the default passwords. However, it is important to note that this default password configuration is only temporary. New passwords should be configured and saved immediately both for security and also so that the unknown passwords will not be restored in case of system reboot.


Note This procedure does not affect configuration parameters other then login passwords. It is, therefore, safe to execute during traffic control.


SUMMARY STEPS

1. Connect a serial terminal to the `AUX' port at 9600 baud.

2. Press Enter so that the prompt appears.

3. At the prompt, type PSWD_ResetAll and press Enter.

DETAILED STEPS


Step 1 Connect a serial terminal to the `AUX' port at 9600 baud.

Step 2 Press Enter so that the prompt appears.

Connects to the SCE platform.

Step 3 At the prompt, type PSWD_ResetAll and press Enter.

Resets the enablepasswords.

The following message will appear:

All 'enable' passwords have been reset.

The SCOS is now using the default passwords for all levels. Note that this is a temporary state that is not preserved after a reboot. Rebooting the SCE platform without changing and saving the passwords will restore the unknown passwords.

n order to block unauthorized users from connecting to the SCE platform using the default password, a new password should be configured immediately for all levels for which such a password is required. The configuration should be saved (use the CLI command copy running-config startup-config) to make the new passwords permanent.


IP Configuration

How to Configure the IP Routing Table 

IP Advertising 

How to Configure the IP Address of the Management Interface 

How to Configure the IP Routing Table

About the IP Routing Table 

How to Configure the Default Gateway 

How to Add an Entry to the IP Routing Table 

How to Display the IP Routing Table 

About the IP Routing Table

For handling IP packets on the out-of-band MNG port, the SCE platform maintains a static routing table. When a packet is sent, the system checks the routing table for proper routing, and forwards the packet accordingly. In cases where the SCE platform cannot determine where to route a packet, it sends the packet to the default gateway.

SCE platform supports the configuration of the default gateway as the default next hop router, as well as the configuration of the routing table to provide different next hop routers for different subnets (for maximum configuration of 10 subnets).

The following sections illustrate how to use CLI commands to configure various parameters.

The following commands are relevant to IP routing tables:

ip default-gateway

ip route prefix mask next-hop

no ip route all

no ip route prefix mask

show ip route

show ip route prefix

show ip route prefix mask

How to Configure the Default Gateway

Options 

Configuring the Default Gateway: Example 

Options

The following option is available:

ip-address—the IP address of the default gateway.


Step 1 From the SCE(config)# prompt, type ip default-gateway ip-address, and press Enter.

Enables privileged EXEC mode.

Enter your password if prompted.


Configuring the Default Gateway: Example

The following example shows how to set the default gateway IP of the SCE platform to 10.1.1.1.

SCE(config)#ip default-gateway 10.1.1.1

How to Add an Entry to the IP Routing Table

Options 

How to Add an Entry to the IP Routing Table: Example 

Options

The following options are available:

prefix — IP address of the routing entry, in dotted notation.

mask — The relevant subnet mask, in dotted notation

next-hop — The IP address of the next hop in the route, in dotted notation.

Must be within the MNG interface subnet.


Step 1 SFrom the SCE(config)# prompt, type ip route prefixmasknext-hop, and press Enter.

Adds the specified IP routing entry to the routing table.


How to Add an Entry to the IP Routing Table: Example

The following example shows how to set the router 10.1.1.250 as the next hop to subnet 10.2.0.0.

SCE(config)#ip route 10.2.0.0 255.255.0.0 10.1.1.250

How to Display the IP Routing Table

How to Display the Entire IP Routing Table 

How to Display the IP Routing Table for a Specified Subnet 

How to Display the Entire IP Routing Table

Displaying the Entire IP Routing Table: Example 


Step 1 From the SCE# prompt, type show ip route and press Enter.

Displays the entire routing table and the destination of last resort (default-gateway)


Displaying the Entire IP Routing Table: Example

This example shows how to display the routing table.

SCE#show ip route 
gateway of last resort is        10.1.1.1 
|    prefix       |     mask         |    next hop     | 
|-----------------|------------------|-----------------| 
|        10.2.0.0 |     255.255.0.0  |      10.1.1.250 | 
|        10.3.0.0 |     255.255.0.0  |      10.1.1.253 | 
|        198.0.0.0 |       255.0.0.0 |      10.1.1.251 | 
|        10.1.60.0 |   255.255.255.0 |      10.1.1.5   |

How to Display the IP Routing Table for a Specified Subnet

Options 

Displaying the IP Routing Table for a Specified Subnet: Example 

Options

The following options are available:

prefix — IP address of the routing entry, in dotted notation.

mask — The relevant subnet mask, in dotted notation


Step 1 From the SCE# prompt, type show ip route prefixmaskand press Enter.

Displays the routing table for the specified subnet (prefix/mask).


Displaying the IP Routing Table for a Specified Subnet: Example

This example shows how to display the routing table for a specified subnet.

SCE#show ip route 10.1.60.0 255.255.255.0 
|    prefix       |     mask        |    next hop     | 
|-----------------|-----------------|-----------------| 
|       10.1.60.0 |   255.255.255.0 |        10.1.1.5 | 
SCEnumber

IP Advertising

About IP Advertising 

How to Configure IP Advertising 

How to Display the Current IP Advertising Configuration 

About IP Advertising

IP advertising is the act of periodically sending ping requests to a configured address at configured intervals. This maintains the SCE platform IP/MAC addresses in the memory of adaptive network elements, such as switches, even during a long period of inactivity.

The following commands are relevant to IP advertising:

[no] ip advertising

ip advertising destination

ip advertising interval

default ip advertising destination

default ip advertising interval

show ip advertising

show ip advertising destination

show ip advertising interval

How to Configure IP Advertising

To configure IP advertising, you must first enable IP advertising. You may then specify a destination address to which the ping request is to be sent and/or the frequency of the ping requests (interval). If no destination or interval is explicitly configured, the default values are assumed.

Options 

How to Enable IP Advertising 

How to Configure the IP Advertising Destination 

How to Configure the IP Advertising Interval 

Configuring IP Advertising: Example 

Options

The following options are available in the IP advertising commands:

interval — The time interval between pings in seconds.

default interval = 300 seconds

destination — The IP address of the destination for the ping requests

default destination = 127.0.0.1

How to Enable IP Advertising


Step 1 From the SCE(config)# prompt, type ip advertising , and press Enter.

Enables IP advertising.


How to Configure the IP Advertising Destination


Step 1 From the SCE(config)# prompt, type ip advertising destination destination, and press Enter.

Configures the destination for the IP advertising pings.


How to Configure the IP Advertising Interval


Step 1 From the SCE(config)# prompt, type ip advertising interval interval , and press Enter.

Configures the frequency of the IP advertising pings.


Configuring IP Advertising: Example

The following example shows how to configure IP advertising, specifying 10.1.1.1 as the destination and an interval of 240 seconds.

SCE(config)#ip advertising destination 10.1.1.1 interval 240

How to Display the Current IP Advertising Configuration


Step 1 From the SCE# prompt, type show ip advertising and press Enter.

Displays the status of IP advertising (enabled or disabled), the configured destination, and the configured interval


How to Configure the IP Address of the Management Interface

About the Management Interface IP Address 

Options 

Configuring the IP Address of the Management Interface: Example 

About the Management Interface IP Address

The user must define the IP address of the management interface. When both management ports are connected, providing a redundant management port, this IP address always acts as a virtual IP address for the currently active management port, regardless of which port is the active port.


Note Changing the IP address of the management interface via telnet will result in loss of the telnet connection and inability to reconnect with the interface.



Note After changing the IP address, you must reload the SCE platform (see How to Reboot and Shut Down the SCE Platform ) so that the change will take effect properly in all internal and external components of the SCE platform.


Options

The following options are available:

ip-address — The IP address of the management interface. If both management ports are connected, so that a backup management link is available, this IP address will be act as a virtual IP address for the currently active management port, regardless of which physical port is currently active.

subnet mask — subnet mask of the management interface.

SUMMARY STEPS

1. Connect the SCE platform directly to a local console.

2. From the SCE(config if)# prompt, type ip address ip-addresssubnet-maskand press Enter.

DETAILED STEPS


Step 1 Connect the SCE platform directly to a local console.

Establishes contact with the SCE platform that is not dependent on the configured IP address.

Step 2 From the SCE(config if)# prompt, type ip address ip-addresssubnet-maskand press Enter.

Configures a new IP address for the management interface

The command might fail if there is a routing table entry that is not part of the new subnet defined by the new IP address and subnet mask..


Configuring the IP Address of the Management Interface: Example

The following example shows how to set the IP address of the SCE platform to 10.1.1.1 and the subnet mask to 255.255.0.0.

SCE(config if)#ip address 10.1.1.1 255.255.0.0

How to Configure Time Clocks and Time Zone

About Time Clocks and Time Zone 

How to Display the System Time 

How to Display the Calendar Time 

How to Set the System Clock 

How to Set the Calendar 

How to Set the Time Zone 

How to Remove the Current Time Zone Setting 

How to Configure Daylight Saving Time 

About Time Clocks and Time Zone

The SCE platform has three types of time settings, which can be configured: the clock, the calendar, and the time zone. It is important to synchronize the clock and calendar to the local time, and to set the time zone properly. The SCE platform does not track Daylight Saving Time automatically, so you must update the time zone when the time changes bi-annually.

The SCE platform has the following two time sources:

A real-time clock, called the calendar, that continuously keeps track of the time, even when the SCE platform is not powered up. When the SCE platform reboots, the calendar time is used to set the system clock. The calendar is not used for time tracking during system operation.

A system clock, which creates all the time stamps during normal operation. This clock clears if the system shuts down. During a system boot, the clock is initialized to show the time indicated by the calendar.

It does not matter which clock you set first, as long as you use the clock and calendar read commands to ensure they are synchronized.

The time zone settings are important because they allow the system to communicate properly with other systems in other time zones. The system is configured based on Coordinated Universal Time (UTC), which is standard in the industry for coordination with other manufacturers' hardware and software. For example, Pacific Standard Time would be written as PST-10, meaning that the name of the time zone is PST, which is 10 hours behind Universal Time.

When setting and showing the time, the time is always typed or displayed according to the local time zone configured.

How to Display the System Time

Displaying the System Time: Example 


Step 1 SFrom the SCE(config)# prompt, type show clock and press Enter.


Displaying the System Time: Example

The following example shows the current system clock.

SCE#show clock 
12:50:03  UTC  MON  November 13 2001 
SCEnumber

How to Display the Calendar Time

Displaying the Calendar Time: Example 


Step 1 From the SCE(config)# prompt, type show calendar and press Enter.


Displaying the Calendar Time: Example

The following example shows the current system calendar.

SCE#show calendar 
12:50:03  UTC  MON  May 11 2007 
SCE#

How to Set the System Clock

Options 

Setting the System Clock: Example 

Options

The following option is available:

time-date the time and date you want to set, in the following format:

hh:mm:ss day month year


Step 1 From the SCE# prompt, type clock set time-date, and press Enter.

Sets the system clock to the specified time and date.


Setting the System Clock: Example

The following example shows how to set the clock to 20 minutes past 10 AM, May 13, 2007, updates the calendar and then displays the time.

SCE#clock set 10:20:00 13 may 2007 
SCE#clock update-calendar 
SCE#show clock 
10:21:10  UTC  THU  May  13  2007

How to Set the Calendar

The calendar is a system clock that continues functioning even when the system shuts down.

Options 

Setting the Calendar: Example 

Options

The following option is available:

time-date —the time and date you want to set, in the following format:

hh:mm:ss day month year

SUMMARY STEPS

1. From the SCE# prompt, type calendar set time-date, and press Enter.

2. From the SCE# prompt, type clock read-calendar , and press Enter.

DETAILED STEPS


Step 1 From the SCE# prompt, type calendar set time-date, and press Enter.

Sets the system calendar to the specified time and date.

The time specified in this command is relative to the configured time zone.

Step 2 From the SCE# prompt, type clock read-calendar , and press Enter.

Synchronizes the system clock with the calendar time you just set .


Setting the Calendar: Example

The following example shows that the calendar is set to 10:20 AM, May 13, 2007. The clock is then synchronized with the calendar setting.

SCE#calendar set 10:20:00 13 may 20017 
SCE#clock read-calendar 
SCE#show calendar 
10:21:06  UTC  THU  May  13  2007

How to Set the Time Zone

Options 

Setting the Time Zone: Example 

Options

The following options are available:

zone — The name of the time zone to be displayed.

default = GMT

hours — The hours offset from UTC. This must be an integer in the range -23 to 23.

default = 0

minutes — The minutes offset from UTC. This must be an integer in the range of 0 to 59. Use this parameter to specify an additional offset in minutes when the offset is not measured in whole hours.

default = 0


Step 1 From the SCE(config)# prompt, type clock timezone zonehoursminutes, and press Enter.

Sets the timezone to the specified timezone name with the configured offset in hours and minutes.


Setting the Time Zone: Example

The following example shows how to set the time zone to Pacific Standard Time with an offset of 10 hours behind UTC.

SCE(config)#clock timezone PST -10 
SCE(config)#

How to Remove the Current Time Zone Setting


Step 1 From the SCE(config)# prompt, type n o clock timezone and press Enter.

Removes the timezone configuration and resets the timezone to the default value (UTC).


How to Configure Daylight Saving Time

The SCE platform can be configured to automatically switch to daylight saving time on a specified date, and also to switch back to standard time. In addition, the time zone code can be configured to vary with daylight saving time if required. (For instance, in the eastern United States, standard time is designated EST, and daylight saving time is designated EDT).

Options 

Guidelines 

How to Define Recurring Daylight Saving Time Transitions 

How to Define Non-Recurring Daylight Saving Time Transitions 

How to Cancel the Daylight Saving Time Configuration 

How to Display the Current Daylight Saving Time Configuration 

Options

The transition times into and out of daylight saving time may be configured in one of two ways, depending on how the dates for the beginning and end of daylight saving time are determined for the particular location:

recurring — If daylight saving time always begins and ends on the same day every year, (as in the United States), the clock summer-time recurringcommand is used. The beginning and ending days for daylight saving time can be configured once, and the system will automatically perform the switch every year.

not recurring — If the start and end of daylight saving time is different every year, (as in Israel), the clock summer-timecommand is used. In this case, the transitions must be configured every year for that particular year. (Note that "year" is not necessarily a calendar year. If the transition days are determined in the fall, the transitions for that fall and the next spring may be configured.)

The day on which the transition takes place may be defined in several ways:

Specific date — For example, March 29, 2004. A specific date, including the year, is defined for a not recurring configuration.

First/last occurrence of a day of the week in a specified month — For example, the last Sunday in March. This is used for a recurring configuration.

Day of the week in a specific week in a specified month — For example, Sunday of the fourth week of March. (This would be different from the last Sunday of the month whenever there were five Sundays in the month). This is used for a recurring configuration.

The following options are available:

zone — the time zone code for daylight saving time

week (recurring only)— the week of the month on which daylight saving begins (week1) and ends (week2)

day (recurring only) — the day of the week on which daylight savings begin (day1) and ends (day2)

date (non-recurring only) — the date of the month on which daylight saving begins (date1) and ends (date2)

month — the month in which daylight saving begins (month1) and ends (month2)

year (non-recurring only) — the year in which daylight saving begins (year1) and ends (year2)

offset — the difference in minutes between standard time and daylight saving time.

Default = 60 minutes

Guidelines

General guidelines for configuring daylight saving time transitions:

Specify the time zone code for daylight saving time.

recurring — specify a day of the month (week#|first|last/day of the week/month).

not recurring — specify a date (month/day of the month/year).

Define two days:

Day1 = beginning of daylight saving time.

Day2 = end of daylight saving time.

In the Southern hemisphere, month2 must be before month1, as daylight saving time begins in the fall and ends in the spring.

Specify the exact time that the transition should occur (24 hour clock).

Time of transition into daylight saving time — according to local standard time.

Time of transition out of daylight saving time — according to local daylight savings time.

For the clock summer-time recurringcommand, the default values are the United States transition rules:

Daylight saving time begins: 2:00 (AM) on the second Sunday of March.

Daylight saving time ends: 2:00 (AM) on the first Sunday of November.

How to Define Recurring Daylight Saving Time Transitions


Step 1 From the SCE(config)# prompt, type clock summer-time zonerecurring [week1 day1 month1 time1 week2 day2 month2 time2[ offset]] and press Enter.

Configures daylight saving time to start and stop on the specified days every year.


Defining Recurring Daylight Saving Time Transitions: Example

The following example shows how to configure recurring daylight saving time for a time zone designated "DST" as follows:

Daylight saving time begins — 0:00 on the last Sunday of March.

Daylight saving time ends — 23:59 on the Saturday of fourth week of November.

Offset = 1 hour (default.

SCE(config)# clock summer-time DST recurring last Sunday March 00:00  4 Saturday November 
23:59

How to Define Non-Recurring Daylight Saving Time Transitions


Step 1 From the SCE(config)# prompt, type clock summer-time zone[ date1 month1 year1 time1 date2 month2 year2 time2[ offset]] and press Enter.

Enables privileged EXEC mode.


Defining Non-Recurring Daylight Saving Time Transitions: Example

The following example shows how to configure non-recurring daylight saving time for a time zone designated "DST" as follows:

Daylight saving time begins — 0:00 on April 16, 2004.

Daylight saving time ends — 23:59 October 23, 2004.

Offset = 1 hour (default)

SCE(config)# clock summer-time DST April 16 2004 00:00 October 23 2004 23:59

How to Cancel the Daylight Saving Time Configuration


Step 1 From the SCE(config)# prompt, type no clock summer-time and press Enter.

Removes all daylight saving configuration.


How to Display the Current Daylight Saving Time Configuration


Step 1 From the SCE# prompt, type show timezone and press Enter.

Displays the current time zone and daylight saving time configuration.


How to Configure SNTP

About SNTP 

How to Enable the SNTP Multicast Client 

How to Disable the SNTP Multicast Client 

How to Enable the SNTP Unicast Client 

How to Disable the SNTP Unicast Client 

How to Define the SNTP Unicast Update Interval 

How to Display SNTP Information 

About SNTP

The Simple Network Timing Protocol (SNTP) is a simple solution to the problem of synchronizing the clocks in the various elements of the network. SNTP provides access to a time source via the network. The system clock and calendar are then set in accordance with this external source.

There are two options for the SNTP client. These functions are independent, and the system employ either one or both.

Multicast SNTP client — Listens to SNTP broadcasts and updates the system clock accordingly.

Unicast SNTP client — Sends a periodic request to a configured SNTP server, and updates the system clock according to the server response.


Note It is recommended that an IP access control list be configured to prevent access from unauthorized SNTP or NTP multicast servers (see How to Configure Access Control Lists (ACLs) 


The following commands are relevant to SNTP configuration:

[no] sntp broadcast client

[no] sntp server address

no sntp server all

sntp update-interval

show sntp

How to Enable the SNTP Multicast Client


Step 1 From the SCE(config)# prompt, type sntp broadcast client , and press Enter.

Enables the SNTP multicast client. It will accept time updates from any broadcast server.


How to Disable the SNTP Multicast Client


Step 1 From the SCE(config)# prompt, type no sntp broadcast client , and press Enter.

Disables the SNTP multicast client. It will not accept any broadcast time updates.


How to Enable the SNTP Unicast Client

Options 

Enabling SNTP Unicast Client: Example 

Options

The following option is available:

ip-address — the IP address of the SNTP unicast server.


Step 1 From the SCE(config)# prompt, type sntp server ip-address, and press Enter

Defines the SNTP unicast server so that SNTP client is able to query that server.


Enabling SNTP Unicast Client: Example

The following example shows how to enable an SNTP server at IP address 128.182.58.100.

SCE(config)# sntp server 128.182.58.100

How to Disable the SNTP Unicast Client

How to Disable the SNTP Unicast Client and Remove All Servers 

How to Remove One SNTP Server 

How to Disable the SNTP Unicast Client and Remove All Servers


Step 1 From the SCE(config)# prompt, type no sntp server all , and press Enter.

Removes all SNTP unicast servers, preventing unicast SNTP query.


How to Remove One SNTP Server

Options

The following option is available:

ip-address — the IP address of the SNTP unicast server.


Step 1 From the SCE(config)# prompt, type no sntp server ip-address,and press Enter

Removes the specified SNTP unicast server .


How to Define the SNTP Unicast Update Interval

Options 

Defining the SNTP Unicast Update Interval: Example 

Options

The following option is available:

interval — the time in seconds between updates (64 through 1024)

default interval = 900 seconds


Step 1 From the SCE(config)# prompt, type sntp update-interval interval, and press Enter.

Enables privileged EXEC mode.

Configures the SNTP unicast client to query the server at the defined intervals.


Defining the SNTP Unicast Update Interval: Example

The following example shows how to set the SNTP update interval for 100 seconds.

SCE(config)# sntp update-interval 100

How to Display SNTP Information

Displaying SNTP Information: Example 


Step 1 From the SCE# prompt, type show sntp , and press Enter.

Displays the configuration of both the SNTP unicast client and the SNTP multicast client.


Displaying SNTP Information: Example

This example illustrates how to use this command.

SCE# show sntp 
SNTP broadcast client: disabled 
last update time: not available 
SNTP unicast client: enabled 
SNTP unicast server: 128.182.58.100 
last update time: Feb 10 2002, 14:06:41 
update interval: 100 seconds

How to Configure Domain Name Server (DNS) Settings

About Domain Name Servers 

How to Configure DNS Lookup 

How to Configure Name Servers 

How to Add a Host to the Host Table 

How to Display Current DNS Settings 

About Domain Name Servers

When a name of a host is given as a parameter to a CLI command that expects a host name or an IP address, the system translates the name to an IP address according to the following:

1. If the name is in a dotted decimal notation (that is, in the format x.x.x.x), it is directly translated to an IP address it represents.

2. If the name does not contain the dot character (.), the system looks it up in the IP Host table. If the name is found on the table, it is mapped to the corresponding IP address. The IP host table can be configured using the command ip host.

3. If the name does not contain the dot (.) character, and the domain name function is enabled (See the ip domain-lookupcommand), and a default domain name is specified (See the ip domain-namecommand), the default domain name is appended to the given name to form a fully qualified host name. This, in turn, is used to perform a DNS query translating the name to an IP address.

4. Otherwise, if the domain name function is enabled, the name is considered to be fully qualified, and is used to perform a DNS query translating the name to an IP address.

The following commands are relevant to DNS settings:

ip name-server

ip domain-name

no ip domain-name

ip domain-lookup

show hosts

How to Configure DNS Lookup

How to Enable DNS Lookup 

How to Disable DNS Lookup 

How to Enable DNS Lookup


Step 1 From the SCE(config)# prompt, type ip domain-lookup and press Enter.

Enables DNS lookup.


How to Disable DNS Lookup


Step 1 From the SCE(config)# prompt, type no ip domain-lookup and press Enter.


How to Configure Name Servers

Options 

How to Define Domain Name Servers 

How to Remove a Domain Name Server 

How to Remove All Domain Name Servers 

Options

The following options are available:

server-ip-address — The IP address of the domain name server. You can define more than one DNS server (server-ip-address1, server-ip-address2, server-ip-address3)

How to Define Domain Name Servers

Use this command to specify the address of one or more name servers to use for name and address resolution.

Defining Domain Name Servers: Example 


Step 1 From the SCE(config)# prompt, type ip name-server server-address1 [server-address2 [server-address3]], and press Enter.

Defines the servers at the specified addresses as domain name servers.


Defining Domain Name Servers: Example

The following example shows how to configure the two name server (DNS) IP addresses.

SCE(config)#ip name-server 10.1.1.60 10.1.1.61

How to Remove a Domain Name Server


Step 1 From the SCE(config)# prompt, type no ip name-server server-address1 [server-address2 [server-address3]], and press Enter.

Removes the specified server from the DNS list.


Removing a Domain Name Server: Example

The following example shows how to remove name server (DNS) IP addresses.

SCE(config)#no ip name-server 10.1.1.60 10.1.1.61

How to Remove All Domain Name Servers


Step 1 From the SCE(config)# prompt, type no ip name-server , and press Enter.

Removes all configured DNS servers.


How to Add a Host to the Host Table

Options 

Adding Hosts to Removing them from the Host Table: Examples 

Options

The following options are available:

hostname — The name of the host.

ip-address — The IP address of the host


Step 1 From the SCE(config)# prompt, type ip host hostname ip-address, and press Enter.

Adds the specified host to the host table.


Adding Hosts to Removing them from the Host Table: Examples

The following example shows how to add a host to the host table.

SCE(config)#ip host PC85 10.1.1.61

The following example shows how to remove a hostname together with all its IP mappings.

SCE(config)#no ip host PC85

How to Display Current DNS Settings


Step 1 From the SCE# prompt, type show hosts , and press Enter.

Displays current DNS settings.


Displaying Current DNS Settings: Example

The following example shows how to display current DNS information.

SCE#show hosts 
Default domain is Cisco.com  
Name/address lookup uses domain service 
Name servers are 10.1.1.60, 10.1.1.61 
Host                 Address 
----                 ------- 
PC85                 10.1.1.61 
SCEnumber

How to Configure the Management Port Physical Parameters

This interface has a transmission rate of 10 or 100 Mbps and is used for management operations and for transmitting RDRs, which are the output of traffic analysis and management operations.

The procedures for configuring this interface are explained in the following sections.

How to Configure the Management Interface Speed and Duplex Parameters 

How to Monitor the Management Interface 

How to Configure the Management Interface Speed and Duplex Parameters

This section presents sample procedures that describe how to configure the speed and the duplex of the Management Interface.

Both these parameters must be configured separately for each port.

How to Configure the Duplex Operation of the Management Interface 

How to Configure the Speed of the Management Interface 

How to Configure the Duplex Operation of the Management Interface

Options 

Configuring the Duplex Operation of the Management Interface: Example 

Options

The following options are available:

duplex — duplex operation of the currently selected management port (0/1 or 0/2):

full

half

auto (default) — auto-negotiation (do not force duplex on the link)

If the speed parameter is configured to auto , changing the duplex parameter has no effect (see  ).


Step 1 From the SCE(config if)# prompt, type duplex auto|full|half and press Enter.

Configures the duplex operation of the currently selected management interface.


Configuring the Duplex Operation of the Management Interface: Example

The following example shows how to use this command to configure both management ports to half duplex mode.

SCE#config 
SCE(config)#interface mng 0/1 
SCE(config if)#duplex half 
SCE(config if)#exit 
SCE(config)#interface mng 0/2 
SCE(config if)#duplex half

How to Configure the Speed of the Management Interface

Options 

Configuring the Speed of the Management Interface: Example 

Options

The following options are available:

speed — speed in Mbps of the currently selected management port (0/1 or 0/2):

10

100

auto (default) — auto-negotiation (do not force speed on the link)

If the duplex parameter is configured to auto , changing the speed parameter has no effect (see  ).


Step 1 From the SCE(config if)# prompt, type speed 10|100|autoand press Enter.

Configures the speed of the currently selected management interface.


Configuring the Speed of the Management Interface: Example

The following example shows how to use this command to configure both management ports to The following example shows how to use this command to configure both management ports to half duplex mode..

SCE#config 
SCE(config)#interface mng 0/1 
SCE(config if)#speed 100 
SCE(config if)#exit 
SCE(config)#interface mng 0/2 
SCE(config if)#speed 100

How to Monitor the Management Interface

Use this command to display the following information for the specified management interface. Speed and duplex parameters are specific to the selected interface (port), while other parameters apply to both ports and are displayed by a command to either interface.

speed

duplex

IP address

active port


Step 1 From the SCE# prompt, type show interface Mng {01 | 0/2} [auto-fail-over|duplex|ip address|speed]and press Enter.

Displays the specified management interface configuration.

If no option is specified, all management interface information is displayed.

The displayed speed and duplex mode are for the management interface specified in the command.