CAUTION:
• The maximum keepalive interval should be one third of the holdtime and no less than 1 second.
The holdtime is no less than 3 seconds unless it is set to 0.
• Intervals set with the
neighbor timers
command are preferred to those set with the
timers
command.
• If the router has established a neighbor relationship with a peer, you need to reset the BGP
connection to validate the new set timers.
Configuring a large scale BGP network
In a large-scale BGP network, configuration and maintenance become difficult due to large numbers of BGP
peers. To facilitate configuration in this case, you can configure community or route reflector as needed.
Prerequisites
A BGP community must be configured. Follow these steps.
To do...
Use the command...
Remarks
Enter the global configuration
context
configuration
Enter the BGP context
bgp as-number
Advertise the community attribute to
a peer
neighbor {
ip-address
}
send-community
Enabled by default
CAUTION:
When configuring the BGP community, you must configure a routing policy to define the community
attribute, and then apply the routing policy to the route advertisement.
Configuring a BGP route reflector
Follow these steps to configure a BGP route reflector:
To do...
Use the command...
Remarks
Enterthe global configuration
context
configuration
Enter the BGP context
bgp
as-number
Configure the router as a route
reflector and specify a peer as its
client
client-to-client-
reflection
Enabled by default
Enable route reflection between
clients
neighbor {
ip-address
}
route-reflector-client
Optional. Enabled by default.
Chapter 17 Border Gateway Protocol (BGP)
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