Configuration Guide User guide

1362 FastIron Configuration Guide
53-1002494-02
Basic configuration tasks required for BGP4
• Outbound distribute list
• Outbound prefix list
• Remote AS, if configured for the peer group
• Remove private AS
• Route reflector client
• Send community
• Timers
• Update source
If you want to change an outbound parameter for an individual neighbor, you must first remove
the neighbor from the peer group. In this case, you cannot re-add the neighbor to the same
peer group, but you can add the neighbor to a different peer group. All the neighbors within a
peer group must have the same values for the outbound parameters. To change an outbound
parameter to the same value for all neighbors within a peer group, you can change the
parameter on a peer-group basis. In this case, you do not need to remove the neighbors and
change the parameter individually for each neighbor.
• If you add an outbound parameter to a peer group, that parameter is automatically applied to
all neighbors within the peer group.
• When you add a neighbor to a peer group, the software removes any outbound parameters for
that neighbor from the running configuration (running-config). As a result, when you save the
configuration to the startup-config file, the file does not contain any outbound parameters for
the individual neighbors you have placed in a peer group. The only outbound parameters the
startup-config file contains for neighbors within a peer group are the parameters associated
with the peer group itself. However, the running-config and the startup-config file can contain
individual parameters listed in the previous section as well as the settings for those
parameters within a peer group.
You can override neighbor parameters that do not affect outbound policy on an individual neighbor
basis.
• If you do not specify a parameter for an individual neighbor, the neighbor uses the value in the
peer group.
• If you set the parameter for the individual neighbor, that value overrides the value you set in
the peer group.
• If you add a parameter to a peer group that already contains neighbors, the parameter value is
applied to neighbors that do not already have the parameter explicitly set. If a neighbor has the
parameter explicitly set, the explicitly set value overrides the value you set for the peer group.
• If you remove the setting for a parameter from a peer group, the value for that parameter
changes to the default value for all the neighbors in the peer group that do not have that
parameter individually set.
Configuring a peer group
To configure a BGP4 peer group, enter commands such as the following at the BGP configuration
level.
Brocade(config-bgp-router)#neighbor PeerGroup1 peer-group
Brocade(config-bgp-router)#neighbor PeerGroup1 description “EastCoast Neighbors”
Brocade(config-bgp-router)#neighbor PeerGroup1 remote-as 100
Brocade(config-bgp-router)#neighbor PeerGroup1 distribute-list out 1