764 BigIron RX Series Configuration Guide
53-1002253-01
Configuring confederations
26
The procedures show how to implement the example confederation shown in Figure 26.3.
To configure four devices to be a member of confederation 10, consisting of two sub-ASs (64512
and 64513), enter commands such as the following.
Commands for Router A
BigIron RXA(config)# router bgp
BigIron RXA(config-bgp)# local-as 64512
BigIron RXA(config-bgp)# confederation identifier 10
BigIron RXA(config-bgp)# confederation peers 64512 64513
BigIron RXA(config-bgp)# write memory
Syntax: local-as <num>
The <num> parameter with the local-as command indicates the AS number for the BGP routers
within the sub-AS. You can specify a number from 1 – 65535. Brocade recommends that you use a
number within the range of well-known private ASs, 64512 – 65535.
Syntax: confederation identifier <num>
The <num> parameter with the confederation identifier command indicates the confederation
number. The confederation ID is the AS number by which BGP routers outside the confederation
know the confederation. Thus, a BGP router outside the confederation is not aware and does not
care that your BGP routers are in multiple sub-ASs. BGP routers use the confederation ID when
communicating with routers outside the confederation. The confederation ID must be different
from the sub-AS numbers. You can specify a number from 1 – 65535.
Syntax: confederation peers <num> [<num> …]
The <num> parameter with the confederation peers command indicates the sub-AS numbers for
the sub-ASs in the confederation. You may list all sub-ASs in the confederation. Also, you must
specify all the sub-ASs with which this router has peer sessions in the confederation. All the
routers within the same sub-AS use IBGP to exchange router information. Routers in different
sub-ASs within the confederation use EBGP to exchange router information. You can specify a
number from 1 – 65535.
Commands for Router B
BigIron RXB(config)# router bgp
BigIron RXB(config-bgp)# local-as 64512
BigIron RXB(config-bgp)# confederation identifier 10
BigIron RXB(config-bgp)# confederation peers 64512 64513
BigIron RXB(config-bgp)# write memory
Commands for Router C
BigIron RXC(config)# router bgp
BigIron RXC(config-bgp)# local-as 64513
BigIron RXC(config-bgp)# confederation identifier 10
BigIron RXC(config-bgp)# confederation peers 64512 64513
BigIron RXC(config-bgp)# write memory
Commands for Router D
BigIron RXD(config)# router bgp
BigIron RXD(config-bgp)# local-as 64513
BigIron RXD(config-bgp)# confederation identifier 10
BigIron RXD(config-bgp)# confederation peers 64512 64513
BigIron RXD(config-bgp)# write memory
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