Juniper BGP, Configuration Manual

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Setting the Peer Type
Each peer group must have a peer type before any BGP sessions for members of
that peer group are allowed to come up and before the Adj-RIBs-Out table of that
peer group can be filled. You can use the
neighbor peer-type command to explicitly
configure a peer type for a peer group.
Alternatively, you can implicitly configure the peer type of a peer group by either of
the following methods:
■
Configure a remote AS for the peer group.
■
Assign a peer with a configured remote AS as a member of the peer group.
In both of these implicit cases, the remote AS is combined with the local AS, the
configured confederation ID, and the configured confederation peers to determine
the peer type of the peer group.
neighbor peer-type
■
Use to specify a peer type for a peer group.
■
This command is supported only for peer groups; it is not available for individual
peers.
■
Use the internal keyword to specify that peers must be in the same AS or, if
confederations are employed, in the same sub-AS in the same confederation.
■
Use the external keyword to specify that peers must be in a different AS.
■
Use the confederation keyword to specify that peers must be in a different
sub-AS in the same confederation. Use this keyword only if confederations are
employed.
■
This command takes effect immediately. If the command changes the peer type
of the peer group, all BGP sessions for members of that peer group are
automatically bounced.
■
All the members of the peer group inherit the characteristic configured with this
command. It cannot be overridden for a specific peer, because the command
applies only to peer groups.
■
Example
host1(config-router)# neighbor promispeers peer-type internal
■
Use the no version to remove the configuration from the peer group.
■
See neighbor peer-type
Assigning a Description
You can associate a description with a BGP neighbor or a peer group. This is a
convenient way to store minimal pertinent information about the neighbor.
neighbor description
28 ■
Configuring BGP Peer Groups
JUNOSe 11.1.x BGP and MPLS Configuration Guide