Cisco 10000 Series Router Broadband MIB Specifications Guide - Configuring MIB Support [Cisco 10000 Series Routers]

Table Of Contents

Configuring MIB Support

Determining MIB Support for Cisco IOS Releases

Downloading and Compiling MIBs

Considerations for Working with MIBs

Downloading MIBs

Compiling MIBs

Cisco SNMP Support

Enabling SNMP Support

Verifying SNMP Support

SNMP Usage Guidelines

Important Notes about SNMP-Server Community Command

SNMP Related Information

Configuring MIB Support

This chapter describes how to configure SNMP and MIB support for the Cisco 10000 Series. It includes the following sections:

•Determining MIB Support for Cisco IOS Releases

•Downloading and Compiling MIBs

•Cisco SNMP Support

Determining MIB Support for Cisco IOS Releases

Follow these steps to determine which MIBs are included in the Cisco IOS release running on the router:

Step 1 Go to the Cisco MIBs Support page (http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml).

Step 2 Under Cisco Access Products, select Cisco 10000 to display a list of MIBs supported on the router.

Step 3 Scroll through the list to find the release you are interested in.

Downloading and Compiling MIBs

The following sections provide information about how to download and compile MIBs for the router:

•Considerations for Working with MIBs

•Downloading MIBs

•Compiling MIBs

Considerations for Working with MIBs

While working with MIBs, consider the following:

•Mismatches on datatype definitions might cause compiler errors or warning messages. For example, the OLD-CISCO-CPU-MIB, OLD-CISCO-MEMORY-MIB, and OLD-CISCO-SYSTEM-MIB each define the following OID differently:
OLD-CISCO-CPU-MIB.my
     1cpu   OBJECT IDENTIFIER ::= {local 1 }
OLD-CISCO-MEMORY-MIB.my
     1env   OBJECT IDENTIFIER ::= {local 1 }
To eliminate MIB compiler errors or warning messages for mismatched definitions, edit one of the MIB definitions to match the other. Other types of mismatches include:
MIB A
Datatype1 ::= INTEGER(0...100)
Datatype2 ::= INTEGER(1...50)
MIB B
Datatype1 ::= DisplayString
Datatype2 ::= OCTET STRING (SIZE(0...255))
•Many MIBs import definitions from other MIBs. If your management application requires MIBs to be loaded, and you experience problems with undefined objects, you might want to load the following MIBs in this order:

SNMPv2-SMI.my
SNMPv2-TC.my
SNMPv2-MIB.my
RFC1213-MIB.my
IF-MIB.my
CISCO-SMI.my
CISCO-PRODUCTS-MIB.my
CISCO-TC.my

•For information about trap definitions, alternative size definitions, and null OIDs, go to the following URL:

ftp://ftp.cisco.com/pub/mibs/app_notes/mib-compilers

•For listings of OIDs assigned to MIB objects, go to the following URL:

ftp://ftp.cisco.com/pub/mibs/oid

•For additional information about downloading and compiling MIBs, go to the bottom of the page at the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

Downloading MIBs

Follow these steps to download the MIBs onto your system if they are not already there:

Step 1 Review the considerations in the previous section ("Considerations for Working with MIBs").

Step 2 Go to one of the following Cisco URLs. If the MIB you want to download is not there, try the other URL; otherwise, go to one of the URLs in Step 5.

•ftp://ftp.cisco.com/pub/mibs/v2

•ftp://ftp.cisco.com/pub/mibs/v1

Step 3 Click the link for a MIB to download that MIB to your system.

Step 4 Select File Save or File Save As to save the MIB on your system.

Step 5 You can download industry-standard MIBs from the following URLs:

•http://www.ietf.org

•http://www.atmforum.com

Compiling MIBs

If you plan to integrate the Cisco 10000 Series with an SNMP-based management application, you must also compile the MIBs for that platform. For example, if you are running HP OpenView on the UNIX operating system, you must compile the router MIBs with the HP OpenView network management system (NMS). For instructions, see the NMS documentation.

Cisco SNMP Support

The following sections provide information about SNMP support for the Cisco 10000 Series:

•Enabling SNMP Support

•Verifying SNMP Support

•SNMP Usage Guidelines

•SNMP Related Information

Enabling SNMP Support

The SNMP agent is disabled by default. The following procedure summarizes how to configure the Cisco 10000 Series for SNMP support. Note that these basic configuration commands are issued for SNMPv2c. For SNMPv3, you must also set up SNMP users and groups.

Step 1 Set up your basic SNMP configuration through the command line interface (CLI). (For command and setup information, see the list of documents that follows this procedure.)

Step 2 Define SNMP read-only and read-write communities:
Router(config)# snmp-server community Read_Only_Community_Name ro
Router(config)# snmp-server community Read_Write_Community_Name rw
Step 3 Configure SNMP views (to limit the range of objects accessible to different SNMP user groups):
Router(config)# snmp-server view view_name oid-tree {included | excluded}
Step 4 See the "Enabling Notifications" section for information on how to enable traps.

Configuration Examples

This section lists configuration examples showing how to enable the SNMP agent.
Router# configure terminal
Router(config)# snmp-server community
In the following example, SNMPv1 and SNMPv2C are enabled. The configuration permits any SNMP manager to access all objects with read-only permissions using the community string public.
Router(config)# snmp-server community public
In the following example, read-only access is allowed for all objects to members of access list 4 that specify the command access community string. No other SNMP managers have access to any objects.
Router(config)# snmp-server community comaccess ro 4
Verifying SNMP Support

To verify that the SNMP agent has been enabled on the router, display the running configuration and look for SNMP information. Enter the following command:
Router(config)# show running-configuration
...
...
snmp-server community public RO
If you see any snmp-server statements, then SNMP is enabled on the router.

SNMP Usage Guidelines

This section describes the snmp-server community command. To configure read-only or read/write Simple Network Management Protocol (SNMP) community strings, use the snmp-server community command in the global configuration mode.

To change the community string to its default value, use the no form of this command:
snmp-server community string [view view-name] [ro | rw] [number] 
no snmp-server community string 
Where:

•community string is a string of 1 to 32 alphanumeric characters. The community string acts like a password and permits access to the SNMP protocol.

•view view-name is the nme of a previously defined view (optional). The view defines the objects available to the community.

•ro configures read-only access

•rw configures read/write access.

•number is the integer from 1 to 99 that specifies an access list of IP addresses that are allowed to use the community string to gain access to the SNMPv1 agent.

Important Notes about SNMP-Server Community Command

The following is a list of SNMP usage information:

•The default value of the read/write parameter is read-only (ro). The default value of the read-only community string is public, and the default value of the read/write community string is private.

•The no snmp-server command disables both versions of SNMP (SNMPv1 and SNMPv2).

•The first snmp-server command that you enter enables both versions of SNMP.

Note All other commands used with this feature are documented in the Cisco command reference publications. Related commands are snmp-server-enable traps and snmp-server host.

Read/Write Community String Examples

•In this example, the read/write community string is set to newstring:

Router(config)# snmp-server community newstring rw

•The string comaccess is assigned to SNMPv1, allowing read-only access. IP access list 4 is enabled to use the community string:

Router(config)# snmp-server community comaccess ro 4

•The string mgr is assigned to SNMPv1, allowing read/write access to the objects in the restricted view:

Router(config)# snmp-server community mgr view restricted rw

•The community comaccess is removed:

Router(config)# no snmp-server community comaccess

•Both versions of SNMP are disabled:

Router(config)# no snmp-server

SNMP Related Information

For detailed information about SNMP commands, see the following Cisco documents:

•Cisco IOS Release 12.3 Configuration Fundamentals Configuration Guide, available at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/cfun_vcg.htm

•Cisco IOS Release 12.3 Configuration Fundamentals Command Reference, available at the the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/fun_r/index.htm

	Cisco 10000 Series Router Broadband MIB Specifications Guide
	Configuring MIB Support
Cisco 10000 Series Router Broadband MIB Specifications Guide Cisco 10000 Series Router MIB Specifications Guide About This Guide Cisco 10000 Series Router MIB Overview Configuring MIB Support MIB Specifications Monitoring Notifications Using MIBs Glossary Index Cisco 10000 Series Router MIB Specifications Guide, Full Book PDF	Download this chapter Configuring MIB Support Table Of Contents Configuring MIB Support Determining MIB Support for Cisco IOS Releases Downloading and Compiling MIBs Considerations for Working with MIBs Downloading MIBs Compiling MIBs Cisco SNMP Support Enabling SNMP Support Verifying SNMP Support SNMP Usage Guidelines Important Notes about SNMP-Server Community Command SNMP Related Information Configuring MIB Support This chapter describes how to configure SNMP and MIB support for the Cisco 10000 Series. It includes the following sections: •Determining MIB Support for Cisco IOS Releases •Downloading and Compiling MIBs •Cisco SNMP Support Determining MIB Support for Cisco IOS Releases Follow these steps to determine which MIBs are included in the Cisco IOS release running on the router: Step 1 Go to the Cisco MIBs Support page (http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml). Step 2 Under Cisco Access Products, select Cisco 10000 to display a list of MIBs supported on the router. Step 3 Scroll through the list to find the release you are interested in. Downloading and Compiling MIBs The following sections provide information about how to download and compile MIBs for the router: •Considerations for Working with MIBs •Downloading MIBs •Compiling MIBs Considerations for Working with MIBs While working with MIBs, consider the following: •Mismatches on datatype definitions might cause compiler errors or warning messages. For example, the OLD-CISCO-CPU-MIB, OLD-CISCO-MEMORY-MIB, and OLD-CISCO-SYSTEM-MIB each define the following OID differently: OLD-CISCO-CPU-MIB.my 1cpu OBJECT IDENTIFIER ::= {local 1 } OLD-CISCO-MEMORY-MIB.my 1env OBJECT IDENTIFIER ::= {local 1 } To eliminate MIB compiler errors or warning messages for mismatched definitions, edit one of the MIB definitions to match the other. Other types of mismatches include: MIB A Datatype1 ::= INTEGER(0...100) Datatype2 ::= INTEGER(1...50) MIB B Datatype1 ::= DisplayString Datatype2 ::= OCTET STRING (SIZE(0...255)) •Many MIBs import definitions from other MIBs. If your management application requires MIBs to be loaded, and you experience problems with undefined objects, you might want to load the following MIBs in this order: SNMPv2-SMI.my SNMPv2-TC.my SNMPv2-MIB.my RFC1213-MIB.my IF-MIB.my CISCO-SMI.my CISCO-PRODUCTS-MIB.my CISCO-TC.my •For information about trap definitions, alternative size definitions, and null OIDs, go to the following URL: ftp://ftp.cisco.com/pub/mibs/app_notes/mib-compilers •For listings of OIDs assigned to MIB objects, go to the following URL: ftp://ftp.cisco.com/pub/mibs/oid •For additional information about downloading and compiling MIBs, go to the bottom of the page at the following URL: http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml Downloading MIBs Follow these steps to download the MIBs onto your system if they are not already there: Step 1 Review the considerations in the previous section ("Considerations for Working with MIBs"). Step 2 Go to one of the following Cisco URLs. If the MIB you want to download is not there, try the other URL; otherwise, go to one of the URLs in Step 5. •ftp://ftp.cisco.com/pub/mibs/v2 •ftp://ftp.cisco.com/pub/mibs/v1 Step 3 Click the link for a MIB to download that MIB to your system. Step 4 Select File Save or File Save As to save the MIB on your system. Step 5 You can download industry-standard MIBs from the following URLs: •http://www.ietf.org •http://www.atmforum.com Compiling MIBs If you plan to integrate the Cisco 10000 Series with an SNMP-based management application, you must also compile the MIBs for that platform. For example, if you are running HP OpenView on the UNIX operating system, you must compile the router MIBs with the HP OpenView network management system (NMS). For instructions, see the NMS documentation. Cisco SNMP Support The following sections provide information about SNMP support for the Cisco 10000 Series: •Enabling SNMP Support •Verifying SNMP Support •SNMP Usage Guidelines •SNMP Related Information Enabling SNMP Support The SNMP agent is disabled by default. The following procedure summarizes how to configure the Cisco 10000 Series for SNMP support. Note that these basic configuration commands are issued for SNMPv2c. For SNMPv3, you must also set up SNMP users and groups. Step 1 Set up your basic SNMP configuration through the command line interface (CLI). (For command and setup information, see the list of documents that follows this procedure.) Step 2 Define SNMP read-only and read-write communities: Router(config)# snmp-server community Read_Only_Community_Name ro Router(config)# snmp-server community Read_Write_Community_Name rw Step 3 Configure SNMP views (to limit the range of objects accessible to different SNMP user groups): Router(config)# snmp-server view view_name oid-tree {included \| excluded} Step 4 See the "Enabling Notifications" section for information on how to enable traps. Configuration Examples This section lists configuration examples showing how to enable the SNMP agent. Router# configure terminal Router(config)# snmp-server community In the following example, SNMPv1 and SNMPv2C are enabled. The configuration permits any SNMP manager to access all objects with read-only permissions using the community string public. Router(config)# snmp-server community public In the following example, read-only access is allowed for all objects to members of access list 4 that specify the command access community string. No other SNMP managers have access to any objects. Router(config)# snmp-server community comaccess ro 4 Verifying SNMP Support To verify that the SNMP agent has been enabled on the router, display the running configuration and look for SNMP information. Enter the following command: Router(config)# show running-configuration ... ... snmp-server community public RO If you see any snmp-server statements, then SNMP is enabled on the router. SNMP Usage Guidelines This section describes the snmp-server community command. To configure read-only or read/write Simple Network Management Protocol (SNMP) community strings, use the snmp-server community command in the global configuration mode. To change the community string to its default value, use the no form of this command: snmp-server community string [view view-name] [ro \| rw] [number] no snmp-server community string Where: •community string is a string of 1 to 32 alphanumeric characters. The community string acts like a password and permits access to the SNMP protocol. •view view-name is the nme of a previously defined view (optional). The view defines the objects available to the community. •ro configures read-only access •rw configures read/write access. •number is the integer from 1 to 99 that specifies an access list of IP addresses that are allowed to use the community string to gain access to the SNMPv1 agent. Important Notes about SNMP-Server Community Command The following is a list of SNMP usage information: •The default value of the read/write parameter is read-only (ro). The default value of the read-only community string is public, and the default value of the read/write community string is private. •The no snmp-server command disables both versions of SNMP (SNMPv1 and SNMPv2). •The first snmp-server command that you enter enables both versions of SNMP. Note All other commands used with this feature are documented in the Cisco command reference publications. Related commands are snmp-server-enable traps and snmp-server host. Read/Write Community String Examples •In this example, the read/write community string is set to newstring: Router(config)# snmp-server community newstring rw •The string comaccess is assigned to SNMPv1, allowing read-only access. IP access list 4 is enabled to use the community string: Router(config)# snmp-server community comaccess ro 4 •The string mgr is assigned to SNMPv1, allowing read/write access to the objects in the restricted view: Router(config)# snmp-server community mgr view restricted rw •The community comaccess is removed: Router(config)# no snmp-server community comaccess •Both versions of SNMP are disabled: Router(config)# no snmp-server SNMP Related Information For detailed information about SNMP commands, see the following Cisco documents: •Cisco IOS Release 12.3 Configuration Fundamentals Configuration Guide, available at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/cfun_vcg.htm •Cisco IOS Release 12.3 Configuration Fundamentals Command Reference, available at the the following URL: http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/fun_r/index.htm
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