Basic Configuration And Activation For Bgp4; Note Regarding Disabling Bgp4 - Foundry Networks Switch and Router Installation And Configuration Manual

Foundry Switch and Router Installation and Configuration Guide

Basic Configuration and Activation for BGP4

BGP4 is disabled by default. To enable BGP4 and place your Foundry Layer 3 Switch into service as a BGP4
router, you must perform at least the following steps:
1. Enable the BGP4 protocol.
2. Set the local AS number.
NOTE: You must specify the local AS number. BGP4 is not functional until you specify the local AS
number.
3. Add each BGP4 neighbor (peer BGP4 router) and identify the AS the neighbor is in.
4. Save the BGP4 configuration information to the system configuration file.
NOTE: By default, the Foundry router ID is the IP address configured on the lowest numbered loopback
interface. If the Layer 3 Switch does not have a loopback interface, the default router ID is the lowest numbered
IP address configured on the device. For more information or to change the router ID, see "Changing the Router
ID" on page 15-26. If you change the router ID, all current BGP4 sessions are cleared.
USING THE CLI
NOTE: This procedure shows a command prompt for a BigIron, but the same steps apply to any Foundry Layer
3 Switch that supports BGP4.
BigIron> enable
BigIron# configure terminal
BigIron(config)# router bgp
BGP4: Please configure 'local-as' parameter in order to enable BGP4.
BigIron(config-bgp-router)# local-as 10
BigIron(config-bgp-router)# neighbor 209.157.23.99 remote-as 100
BigIron(config-bgp-router)# write memory
NOTE: When BGP4 is enabled on a Foundry Layer 3 Switch, you do not need to reset the system. The protocol
is activated as soon as you enable it. Moreover, the router begins a BGP4 session with a BGP4 neighbor as soon
as you add the neighbor.
USING THE WEB MANAGEMENT INTERFACE
1. Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2. Select the Enable radio button next to BGP.
3. Enter the local AS number in the Local AS field.
4. Click the Apply button to apply the changes to the device's running-config file.
5. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.

Note Regarding Disabling BGP4

If you disable BGP4, the Layer 3 Switch removes all the configuration information for the disabled protocol from
the running-config. Moreover, when you save the configuration to the startup-config file after disabling one of
these protocols, all the configuration information for the disabled protocol is removed from the startup-config file.
The CLI displays a warning message such as the following:
BigIron(config-bgp-router)# no router bgp
19 - 6 December 2000