R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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To do… Use the command… Remarks
Specify an AS number for a peer
peer ip-address as-number
as-number
Required
Add the peer into the group
peer ip-address group
group-name [ as-number
as-number ]
Required
The AS number can be either specified or
not specified in the command. If
specified, the AS number must be the
same as that specified for the peer with
the peer ip-address as-number as-number
command.
NOTE:
Peers added in the group can have different AS numbers.
Follow these steps to configure an eBGP peer group using the third approach:
To do… Use the command…
Remarks
Enter system view system-view
—
Enter BGP view bgp as-number
—
Create an eBGP peer group group group-name external Required
Add a peer into the group and
specify its AS number
peer ip-address group group-name
as-number as-number
Required
NOTE:
• Do not specify an AS number for a peer before adding it into the peer group.
• Peers added in the group can have different AS numbers.
Configuring BGP community
Configuring BGP community can also help simplify routing policy management, and a community has
a much larger management scope than a peer group by controlling routing policies of multiple BGP
routers.
To guarantee the connectivity between iBGP peers, you need to make them fully meshed. But it becomes
unpractical when there are large numbers of iBGP peers. Configuring route reflectors or confederation
can solve it. In a large-scale AS, both of them can be used.
A BGP community is a group of destinations with the same characteristics. It has no geographical
boundaries and is independent of ASs.
You can configure a route policy to define which destinations belong to a BGP community and then
advertise the community attribute to a peer/peer group.
You can apply a route policy to filter routes advertised to/received from a peer/peer group according to
the community attribute. This way helps simplify policy configuration and management.
For how to configure a route policy, see the chapter “Policy-based routing configuration.”
Follow these steps to configure BGP community:
To do… Use the command…
Remarks
Enter system view system-view
—