Tuning And Optimizing Bgp Networks; Configuration Prerequisites; Configuring The Bgp Keepalive Interval And Holdtime - HP 3600 v2 series Configuration Manual

To do...
Configure BGP to ignore the first AS number
of eBGP route updates

Tuning and optimizing BGP networks

Configuration prerequisites

BGP connections must be created.

Configuring the BGP keepalive interval and holdtime

After establishing a BGP connection, two routers send keepalive messages periodically to each other to
keep the connection. If a router receives no keepalive or update message from the peer within the
holdtime, it tears down the connection.
You can configure the keepalive interval and holdtime globally or for a specific peer or peer group. The
actual keepalive interval and holdtime depend on the following cases:
If the holdtime settings on the local and peer routers are different, the smaller one is used.
•
If the keepalive interval is 0 and the negotiated holdtime is not 0, the actual keepalive interval
•
equals one-third of the holdtime.
If the keepalive interval is not 0, the actual keepalive interval is the smaller one between one third
•
of the holdtime and the keepalive interval.
Follow these steps to configure BGP keepalive interval and holdtime:
To do...
Enter system view
Enter BGP view
Configure the global keepalive interval
and holdtime
Configure the keepalive interval and
holdtime for a peer or peer group
Use the command...
ignore-first-as
Use the command...
system-view
bgp as-number
timer keepalive keepalive hold
holdtime
peer { group-name | ip-address }
timer keepalive keepalive hold
holdtime
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Remarks
Required
By default, BGP checks the
first AS number of eBGP
route updates.
Remarks
—
—
Optional
By default, the keepalive
interval is 60 seconds, and
holdtime is 180 seconds.