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458 CHAPTER 30: CONFIGURING BGP
By default, send no community attribute to any peer group.
6 Configure a peer group as the client of a BGP reflector
In general, the AS requires that all the IBGP routers should be connected to one
another, and the routes sent by the IBGP neighbors is not advertised, to prevent
route loop. However, if the route reflector is used, not all IBGP speakers are
required to be fully connected. This technique requires configuring an internal BGP
peer as a router reflector. Other internal peers are not necessarily mesh connected
but set up an IBGP session with the route reflector and learn routes through the
route reflector. Using
peer reflect-client command, you can configure
internal neighbors which can communicate with the route reflector. These
neighbors are the client-group members of the route reflector. Other neighbors
are the non-client-group members.
Generally, it is unnecessary to configure this command for the peer entity since the
IBGP peer is in its default group. You should use the
peer peer-address
reflect-client
command to configure the route reflector client.
Table 533 Configure Peer Group as the Client of BGP Reflector
7 Configure to send the default route to the peer group
Table 534 Configure to Send the Default Route to the Peer Group
By default, the local router does not advertise the default route to any peer group.
A next hop should be sent to the peer unconditionally as the default route.
8 Set the router’s own IP address as the next hop when the peer group distributes
route information.
Cancel the processing of next hop when sending a route to the peer and take the
self-address as the next hop.
Table 535 Set the Own IP address as Next Hop When Peer Group Distributes Route
By default, the router’s own IP address is not set as the next hop when the peer
group distributes routes.
9 Create a routing policy for the peer group
Table 536 Create Routing Policy for Peer Group
Operation Command
Configure peer group as the client of BGP
reflector
peer group-name reflect-client
Disable peer group as the client of BGP
reflector
undo peer group-name reflect-client
Operation Command
Configure to send the default route to
peer group
peer group-name
default-route-advertise
Do not allow to send default route to the
peers
undo peer group-name
default-route-advertise
Operation Command
Set the own IP address as next hop when
peer group distributes route
peer group-name next-hop-local
Not to set the own IP address as next hop
when peer group distributes route
undo peer group-name next-hop-local
Operation Command