Cisco Small Business SPA100 Series Phone Adapters Administration Guide (HTML)
Configuring the Network
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Configuring the Network

Table Of Contents

Configuring the Network

Basic Setup

Network Service (SPA122 Only)

Internet Settings

Network Settings for the LAN and DHCP Server (SPA122 Only)

Time Settings

Advanced Settings

Port Setting (SPA122 Only)

MAC Address Clone (SPA122 Only)

VPN Passthrough (SPA122 Only)

VLAN

CDP & LLDP

Application (SPA122 Only)

Quality of Service (QoS) (SPA122 Only)

Port Forwarding (SPA122 Only)

Manually Adding Port Forwarding (SPA122 Only)

DMZ (SPA122 Only)


Configuring the Network


This chapter describes how to configure the network settings for your ATA. It includes the following sections:

Basic Setup

Advanced Settings

Application (SPA122 Only)

Basic Setup

Use the Network Setup > Basic Setup pages to configure your Internet connection, local network settings (SPA122 only), and your time settings.

Network Service (SPA122 Only)

Internet Settings

Network Settings for the LAN and DHCP Server (SPA122 Only)

Time Settings

Network Service (SPA122 Only)

Use the Network Setup > Basic Setup > Network Service page to configure the operating mode of the SPA122.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

You can configure the ATA to operate in one of the following modes:

NAT: Network Address Translation (NAT) is a function that allows multiple devices on a private network to share a public, routable IP address to establish connections over the Internet. To enable Voice over IP service to co-exist with NAT, some form of NAT traversal is required, either on the ATA or another network device. Use this option if your ATA connects to one network on the WAN port (10.0.0.0 for example) and to another network on the LAN port (192.168.0.0 for example). This option is selected by default and is suitable for most deployments.

Bridge: Bridged mode is used if the ATA is acting as a bridge device to another router. Choose this option if your ATA bridges a network (10.0.0.0 for example) to its LAN port (with connected devices also in the 10.0.0x range).

Internet Settings

Use the Network Setup > Basic Setup > Internet Settings page to set up your Internet connection.

Enter the settings as described in the table. After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Internet Connection Type

Field
Description

Connection Type

Specify the Internet addressing method that your ISP requires. Default setting: Automatic Configuration - DHCP

Automatic Configuration - DHCP: Use this setting if your ISP dynamically provides an IP address. No additional settings are required on this page.

Static IP: Use this setting if your ISP assigned a static/permanent IP address. Complete the fields that appear. See more information below.

PPPoE (DSL service): Some DSL-based ISPs use PPPoE (Point-to-Point Protocol over Ethernet) to establish Internet connections. If you are connected to the Internet through a DSL line, check with your ISP to see if they use PPPoE. Complete the fields that appear. See more information below.

Static IP Settings

Internet IP Address and Subnet Mask: Enter the IP address and subnet mask that was assigned to your account by your service provider. This address is seen by external users on the Internet.

Default Gateway: Enter the Gateway IP Address that was provided by your ISP.

If needed, you can adjust the MTU and Optional Settings, as described below.

PPPoE Settings

User Name and Password: Enter the user name and password that you use to log into your ISP network through a PPPoE connection.

Service Name: If provided by your ISP, enter the Service Name.

Connect on Demand: You can configure the ATA to disconnect your Internet connection after a specified period of inactivity (Max Idle Time). If your Internet connection has been terminated due to inactivity, this feature enables the ATA to automatically re-establish your connection as soon as you attempt to access the Internet again. If you choose this option, also set the Max Idle Time.

Keep Alive: This option keeps you connected to the Internet indefinitely, even when your connection sits idle. If you choose this option, also set the Redial Period, which is the interval at which the ATA verified Internet connectivity. The default period is 30 seconds.

If needed, you can adjust the MTU and Optional Settings, as described below.

MTU

The Maximum Transmission Unit (MTU) setting specifies the largest protocol data unit (in bytes) permitted for network transmission. Generally, a larger MTU means greater efficiency. However, a larger packet may cause delays for other traffic and is more likely to become corrupted. In most cases, you should keep the default setting, Auto, to allow the ATA to choose the appropriate MTU. To specify the MTU, select Manual, and then enter the number of bytes.


Optional Settings

Feature
Description

Host Name

The name of the ATA. The default value is the model number. Your ISP may specify a host name to use.

Domain Name

The domain name, if specified by your ISP. Otherwise, leave the field blank.

DNS Server Order

Choose the preferred method for choosing a DNS server.

DHCP-Manual—The DNS server settings from the network server will take precedence, and your entries in the DNS fields below will be used only as a backup.

Manual-DHCP—Your entries in the DNS fields below will take precedence, and the DNS server settings from the network server will be used as a backup.

Manual—Your entries in the DNS fields below will be used to choose a DNS server.

Primary DNS

Enter the IP address of the primary Domain Name Service (DNS) server to use for domain name resolution. Keep the default entry, 0.0.0.0, to use the primary DNS server that is specified for the WAN connection.

Secondary DNS

Enter the IP address of the secondary Domain Name Service (DNS) server to use for domain name resolution. Keep the default entry, 0.0.0.0, to use the secondary DNS server that is specified for the WAN connection.


Network Settings for the LAN and DHCP Server (SPA122 Only)

Use the Network Setup > Basic Setup > Network Settings page to set the IP address and subnet mask for your local network. Also configure the settings for the built-in DHCP server (SPA122 only).

Enter the settings as described below. After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Router IP

Enter the Local IP Address and Subnet Mask for your local network. The default setting is 192.168.15.1 with a subnet mask of 255.255.255.0.

DHCP Server Setting

Field
Description

DHCP Server

The ATA can use the built-in DHCP server to dynamically assign IP addresses to connected devices. Click Enabled to enable the DHCP server, or click Disabled to disable this feature.
Default setting: Enabled

IP Reservation:

Click the Show DHCP Reservation button to view and manage the DHCP client list. Click the Hide DHCP Reservation button to hide the list. When the list is displayed, you can perform the following tasks:

To reserve a static IP address for a current DHCP client: Check the box for the client in the Select Clients from DHCP Tables list. Click Add Clients. The selected clients are added to the Clients Already Reserved list. These clients have static IP addresses that do not change.

To add a client that is not in the Select Clients from DHCP Tables list: Type a name for the client in the Enter Client Name box. Enter an IP address for this client in the Assign IP Address box. Enter the MAC address in the following format: 00:00:00:00:00:00. Click Add.

To remove a client from the Clients Already Reserved list: Check the box for the client. Click Remove.

Default Gateway

Enter the IP address of the default gateway to be used by the DHCP clients.
Default setting: 192.168.15.1 (the IP address of the ETHERNET (LAN) interface)

Starting IP Address

Enter the first address in the range of addresses to be assigned dynamically by the DHCP server.
Default setting: 192.168.15.100

Maximum DHCP Users

Enter the maximum number of devices that can dynamically receive, or "lease," DHCP addresses from the DHCP server.
Default setting: 50

IMPORTANT: Typically, the ATA can support up to five connected computers for business-related tasks such as web browsing and viewing email. The ATA is not designed to support streaming music, video, games, or other network traffic-intensive tasks.

Client Lease Time

Enter the number of minutes that a dynamically assigned IP address can be in use, or "leased." After this time elapses, a client device has to request a DHCP lease renewal. Use 0 to represent 1 day, 9999 never expire.
Default setting: 0

Option 66

Provides provisioning server address information to hosts that request this option. Server information can be defined in one of three ways:

None: The ATA uses its own TFTP server to source provisioning files, so it returns its own local IP address to the client.

Remote TFTP Server: The ATA was configured by using this method, and received server information through Option 66 on its WAN interface. In response to client requests, it provides the remote TFTP server information.

Manual TFTP Server: Allows the manual configuration of a configuration server address. While this option is typically used to provide either an IP address or a fully qualified hostname, the ATA will also accept and offer a full URL including protocol, path and filename to meet to requirements of specific clients.

Default setting: None

TFTP Server

If you chose Manual TFTP Server for Option 66, enter the IP address, hostname, or URL of the TFTP server that is used to configure the ATA.
Default setting: blank

Option 67

Provides a configuration/bootstrap filename to hosts that request this option. This option is used in conjunction with option 66 to allow a client to form an appropriate TFTP request for the file.
Default setting: blank

Option 159

Provides a configuration URL to clients that request this option. An option 159 URL defines the protocol and path information by using an IP address for clients that cannot use DNS. For example:
https://10.1.1.1:888/configs/bootstrap.cfg
Default setting: blank

Option 160

Provides a configuration URL to clients that request this option. An option 160 URL defines the protocol and path information by using a fully qualified domain name for clients that can use DNS. For example:
https://myconfigs.cisco.com:888/configs/bootstrap.cfg
Default setting: blank

DNS Proxy

When enabled, the DNS proxy relays DNS requests to the current public network DNS server for the proxy, and replies as a DNS resolver to the client device on the network. Click Enabled to enable this feature, or click Disabled to disable it. If DNS proxy is disabled, then DHCP clients will be offered DNS server information by using the Static DNS servers, if defined, or by using the using the servers specified for the INTERNET (WAN) interface.
Default setting: Enabled


Time Settings

Use the Network Setup > Basic Setup > Time Settings page to set the system time for the ATA. By default, the system time is set automatically by using a Network Time Protocol (NTP) server. You can configure the system time manually. In addition, you can use this page to specify your time zone, enable Daylight Saving adjustments, and modify related settings.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

User Manual

If you prefer to set the system manually rather than automatically obtaining the settings from an NTP server, click User Manual and then enter the date and time.

Field
Description

Date

Enter the date in the following order: four-digit year, month, day.

Time

Enter the time in the following order: hour (from 1 to 24), minutes, and seconds.


Time Zone

To use a time server to establish the time settings, select Time Zone. Then complete the fields in this section.

Field
Description

Time Zone

Choose the time zone for the site where the ATA is in operation.
Default setting: (GMT-08:00) Pacific Time (USA & Canada)

Adjust Clock for Daylight Saving Changes

Check the box if you want to automatically adjust the time when Daylight Savings Time is in effect. Otherwise, uncheck the box.
Default setting: Enabled

Time Server Address

To use the ATA's default Network Time Protocol (NTP) server, select Auto from the drop-down list. This is the default setting. If you want to specify the NTP server, select Manual, and then enter the NTP server address.
Default setting: Auto

Resync Timer

Enter the Resync timer interval value (in seconds). This timer controls how often the ATA resynchronizes with the NTP server.
Default setting: 3600 seconds

Auto Recovery After Reboot

Choose this option to allow the ATA to automatically reconnect to the time server after a system reboot.
Default setting: Disabled


Advanced Settings

Use the Network Setup > Advanced Settings pages to configure features including port flow control, MAC address cloning, VPN passthrough, and VLAN.

Port Setting (SPA122 Only)

MAC Address Clone (SPA122 Only)

VPN Passthrough (SPA122 Only)

VLAN

CDP & LLDP

Port Setting (SPA122 Only)

Use the Network Setup > Advanced Settings > Port Setting page to set the ETHERNET (LAN) port attributes.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

Flow Control

Flow control is a mechanism that temporarily stops the transmission of data on a port. For example, a situation might arise where a sending station (computer) is transmitting data faster than some other part of the network (including the receiving station) can accept. The overwhelmed network element will halt the transmission of the sender for a specified period of time.

Choose Enabled to enable this feature, or choose Disabled to disable this feature.
Default setting: Enabled

Speed Duplex

Choose the duplex mode. You can select from Auto-negotiate, 10 Half, 10 Full, 100 Half and 100 Full. Cisco recommends choosing Auto-negotiate to automatically select the appropriate mode for the traffic. Use caution with other settings. Problems can result if you choose a setting that is not appropriate for the network devices.
Default setting: Auto-negotiate


MAC Address Clone (SPA122 Only)

A MAC address is a 12-digit code assigned to a unique piece of hardware for identification purposes. Some ISPs require that you register a MAC address in order to access the Internet. If you previously registered your account with another MAC address, it may be convenient to assign that MAC address to your ATA. You can use the Network Setup > Advanced Settings > MAC Address Clone page to assign a MAC address that you previously registered with your Service Provider.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

MAC Clone

Click Enabled to enable MAC address cloning, or click Disabled to disable this feature.
Default setting: Disabled.

MAC Address

Enter the MAC address that you want to assign to your ATA. If your computer's MAC address is the address that you previously registered for your ISP account, click Clone Your PC's MAC. Your computer's MAC address appears in the MAC Address field.
Default setting: the current MAC address of your ATA


VPN Passthrough (SPA122 Only)

Use the Network Setup > Advanced Settings > VPN Passthrough page to configure VPN passthrough for IPsec, PPTP, and L2TP protocols. Use this feature if there are devices behind the ATA that need to set up IPsec tunnels independently. For example, a device may need to use a VPN tunnel to connect to another router on the WAN.

By default, VPN Passthrough is enabled for IPsec, PPTP, and L2TP.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

IPsec Passthrough

Internet Protocol Security (IPsec) is a suite of protocols used to implement secure exchange of packets at the IP layer. Click Enabled to enable this feature, or click Disabled to disable it. Default setting: Enabled

PPTP Passthrough

Point-to-Point Tunneling Protocol (PPTP) allows the Point-to-Point Protocol (PPP) to be tunneled through an IP network. To disable PPTP Passthrough, select Disabled. Default setting: Enabled

L2TP Passthrough

Layer 2 Tunneling Protocol is the method used to enable Point-to-Point sessions via the Internet on the Layer 2 level. Click Enabled to enable this feature, or click Disabled to disable it. Default setting: Enabled


VLAN

Use the Network Setup > Advanced Settings > VLAN page to assign a VLAN ID to your network. For example, your call control system may require a particular voice VLAN ID.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

Enable VLAN

Click Enabled to enable a VLAN, or click Disabled to disable this feature. Default setting: Disabled

VLAN ID

The VLAN ID can be any numeral from 1 through 4094. When VLAN is enabled, the default setting is 1.


CDP & LLDP

Device discovery protocols enable directly connected devices to discover information about each other. You may wish to enable these protocols to allow your network management system to learn about your ATA and endpoints. Use the Network Setup > Advanced Settings > CDP & LLDP page to specify the settings for Cisco Discovery Protocol (CDP) and the Link Layer Discovery Protocol (LLDP). When a discovery protocol is enabled, the ATA sends periodic messages to a multicast address and also listens to the periodic messages sent by other devices that use that protocol.

After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Application (SPA122 Only)

Use the Network Setup > Application pages to support voice service and any servers that you host for public access.

Quality of Service (QoS) (SPA122 Only)

Port Forwarding (SPA122 Only)

DMZ (SPA122 Only)

Quality of Service (QoS) (SPA122 Only)

Use the Network Setup > Application > QoS page to set the upstream bandwidth to suit your broadband service. This feature is enabled by default and helps to ensure that voice is prioritized during periods of heavy network traffic.

Enter the settings as described below. After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

QoS Policy

Click Always On to enable QoS settings at all times, or click On When Phone In Use to enable it only when there is voice traffic.
Default setting: On When Phone In Use

Upstream Bandwidth

Enter the maximum available upstream bandwidth value specified by your Internet Service Provider.
Default setting: 10000 kbps

IMPORTANT: Do not overstate the upstream bandwidth that you receive from your service provider. Setting this value higher than the available service bandwidth can result in traffic being dropped arbitrarily in the service provider's network.


Port Forwarding (SPA122 Only)

Use the Network Setup > Application > Port Forwarding page if you need to explicitly allow access to specific ports from external devices.

List of Port Forwarding

To add a port forwarding rule, click Add Entry. To edit a port forwarding rule, select it in the list and then click the pencil icon. To remove a port forwarding rule, click the delete icon. For more information, see Manually Adding Port Forwarding (SPA122 Only).

Field
Description

Number

An identification number for the port forwarding rule.

Type

The type of rule: Single Port Forwarding or Port Range Forwarding.

Status

The status of the rule: Enabled or Disabled.

Application

The application that uses this rule to access a network resource.


Port Forwarding Details

To display the details, click an entry in the List of Port Forwarding.

Field
Description

External Port

The port that external clients will use to set up this connection.

Internal Port

The port that the ATA uses when forwarding traffic to the internal server.

Protocol

The protocol that is used: TCP or UDP.

IP Address

The IP address of the internal server that is accessed by this rule.


Manually Adding Port Forwarding (SPA122 Only)

Use this page to enter the port forwarding settings for an application.

Enter the settings as described below. After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

Port Forwarding Type

Choose the type of port forwarding:

Single Port Forwarding: Forwards traffic for a specified port to the same or an alternative port on the target server in the LAN.

Port Range Forwarding: Forwards traffic to a range of ports to the same ports on the target server in the LAN. see the Internet application's documentation for the required ports or ranges.

Application Name

For single port forwarding, choose a common application from the drop-down list (such as Telnet, or DNS).

To add an application that is not on the list, choose Add a new name, and then enter the name in the Enter a Name field.

Enter a Name

If you chose Port Range Forwarding, or if you chose Add a new name in the Application Name list for Single Port Forwarding, enter a name to identify the application.

External Port, Internal Port

For Single Port Forwarding, specify the ports to use. For simplicity, the internal and external port numbers will often be the same. However, different external port numbers could be used to differentiate traffic of the same application type intended for different internal servers, or to promote privacy through the use of non-standard ports.

External port: For single port forwarding, enter the port number that external clients will use to set up a connection with the internal server.

Internal port: For single port forwarding, enter the port number that the ATA uses when forwarding traffic to the internal server.

The correct entries appear automatically if you choose a standard application from the Application Name list for Single Port Forwarding.

Start - End Port

For Port Range Forwarding, specify the range of ports to use. Valid values are from 1 to 65535.

Protocol

Select the protocol(s) that can be forwarded: TCP, UDP, or TCP and UDP.

IP Address

Enter the IP address of the local server that will receive forwarded traffic.

To ensure correct forwarding of traffic, local servers must either be configured with a static IP address, or be assigned a reserved IP address through DHCP. Use the Interface Setup > LAN > DHCP Server page to reserve IP addresses. See Network Settings for the LAN and DHCP Server (SPA122 Only).

Enabled

Check the box to enable this port forwarding rule, or uncheck the box to disable it. Default setting: Disabled


DMZ (SPA122 Only)

Use the Network Setup > Application > DMZ page if you need to allow a local device to be exposed to the Internet for a special-purpose service.

The specified network device must have its DHCP client function disabled and must have a reserved IP address (also known as a static IP address) to ensure that it is reachable at the specified IP address. To reserve an IP address for a device, see Network Settings for the LAN and DHCP Server (SPA122 Only).


NOTE A Demilitarized Zone (DMZ) is similar to Port Range Forwarding. Both features allow Internet traffic to access a resource on your private network. However, Port Range Forwarding is more secure because it only opens the ports that you specify for an application. DMZ hosting opens all the ports of one device, exposing it to the Internet.


Enter the settings as described below. After making changes, click Submit to save your settings, or click Cancel to redisplay the page with the saved settings.

Field
Description

Status

Click Enabled to enable this feature, or click Disabled to disable it. Default setting: Disabled

Private IP

Specify the local IP address of the device that can be accessed through the DMZ.