Configuring A Large-Scale Bgp Network; Configuring Bgp Community - HP FlexFabric 12900E Series Configuration Manual

Configuring a large-scale BGP network

In a large network, the number of BGP connections is huge and BGP configuration and maintenance
are complicated. To simply BGP configuration, you can use the peer group, community, route
reflector, and confederation features as needed. For more information about configuring peer groups,
see "Configuring a BGP peer

Configuring BGP community

By default, a router does not advertise the COMMUNITY or extended community attribute to its
peers or peer groups. When the router receives a route carrying the COMMUNITY or extended
community attribute, it removes the attribute before advertising the route to other peers or peer
groups.
Perform this task to enable a router to advertise the COMMUNITY or extended community attribute
to its peers for route filtering and control. You can also use a routing policy to add or modify the
COMMUNITY or extended community attribute for specific routes. For more information about
routing policy, see
To configure BGP community (IPv4 unicast/multicast address family):
Step
1. Enter system view.
2. Enter BGP IPv4 unicast
address
BGP-VPN
address family view, or BGP
IPv4 multicast address family
view.
group."
"Configuring routing policies."
Command
system-view
•
Enter
address family view:
a. bgp
b. address-family
•
Enter BGP-VPN IPv4 unicast
address family view:
c. bgp
family view,
IPv4 unicast
d. ip
e. address-family
•
Enter BGP IPv4 multicast
address family view:
f. bgp
g. address-family
BGP IPv4 unicast
as-number
[ instance
instance-name
[ multi-session-thread ]
ipv4
[ unicast ]
as-number
[ instance
instance-name
[ multi-session-thread ]
vpn-instance
vpn-instance-name
ipv4
[ unicast ]
as-number
[ instance
instance-name
[ multi-session-thread ]
ipv4
multicast
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Remarks
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