Brocade Communications Systems ICX 7250 series, Руководство по настройке

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To set the local as number for a VRF, enter commands such as the following.
device(config-bgp)# address-family ipv4 unicast vrf vrf-name
device(config-bgp)# local-as num
Syntax: [no] local-as num
The num parameter specifies a local AS number in the range 1 - 4294967295. It has no default. AS numbers 64512 - 65535 are the
well-known private BGP4 AS numbers and are not advertised to the Internet community.
The configuration takes effect immediately and the BGP VRF instance is reset. All BGP peering within the VRF is reset, and take the new
AS number.
The local AS number for the VRF instance, if configured, is displayed in the show running-config and show ip bgp config command
output.
Enter the show ip bgp config command:
device# show ip bgp config
Current BGP configuration:
router bgp
local-as 100
neighbor 10.10.10.10 remote-as 200
address-family ipv4 unicast
exit-address-family
address-family ipv6 unicast
exit-address-family
address-family ipv4 unicast vrf vrf_a
local-as 300
neighbor 10.111.111.111 remote-as 400
exit-address-family
Adding a loopback interface
You can configure the device to use a loopback interface instead of a specific port or virtual routing interface to communicate with a
BGP4 neighbor. A loopback interface adds stability to the network by working around route flap problems that can occur due to unstable
links between the device and neighbors.
Loopback interfaces are always up, regardless of the states of physical interfaces. Loopback interfaces are especially useful for IBGP
neighbors (neighbors in the same AS) that are multiple hops away from the device. When you configure a BGP4 neighbor on the device,
you can specify whether the device uses the loopback interface to communicate with the neighbor. As long as a path exists between the
device and the neighbor, BGP4 information can be exchanged. The BGP4 session is not associated with a specific link, but is instead
associated with the virtual interfaces.
NOTE
If you configure the Brocade device to use a loopback interface to communicate with a BGP4 neighbor, the peer IP address on
the remote device pointing to your loopback address must be configured.
To add a loopback interface, enter commands such as the following.
device(config-bgp)# exit
device(config)# int loopback 1
device(config-lbif-1)# ip address 10.0.0.1/24
Syntax: [no] interface loopback num
The num value can be from 1 through the maximum number of loopback interfaces supported on the device.
Basic configuration tasks required for BGP4
Brocade FastIron Layer 3 Routing Configuration Guide
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