Configuring A Bgp Community - H3C S7500 Series Operation Manual

Operation Manual – Routing Protocol
H3C S7500 Series Ethernet Switches
Caution:
It is not required to specify an AS number for creating an IBGP peer group.
If there already exists a peer in a peer group, you can neither change the AS
number of the peer group nor delete a specified AS number through the undo
command.

6.7.3 Configuring a BGP Community

Follow these steps to configure a BGP community:
Enter system view
Enter BGP view
Configure the peers to
advertise community
attribute to the peer group
Specify routing policy for
the routes exported to the
peer group
Caution:
When configuring BGP community, make sure you use a routing policy to define
the specific community attribute, and then apply the routing policy when a peer
sends routing information.
For configuration of routing policy, refer to IP Routing Policy Configuration.
6.7.4 Configuring BGP RR
Follow these steps to configure BGP RR:
To do...
system-view
bgp as-number
peer group-name
advertise-community
peer group-name
route-policy
route-policy-name export
Use the command...
6-21
Chapter 6 BGP Configuration
Remarks
—
—
Required
By default, no community
attribute or extended
community attribute is
advertised to any peer
group.
Required
By default, no routing
policy is specified for the
routes exported to the
peer group.