H3C Technologies H3C SecPath F1000-E - Manual (Page 489)

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NOTE:
•
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.
• The intervals set with the peer timer command are preferred to those set with the timer 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.
• The timer command takes effect for only new connections.
• After peer timer command is executed, the peer connection is closed at once, and a new connection to
the peer is negotiated using the configured hold time.
Configuring the interval for sending the same update
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Configure the interval for
sending the same update to a
peer/peer group.
peer { group-name | ip-address }
route-update-interval interval
Optional.
The intervals for sending the
same update to an IBGP peer
and an EBGP peer default to
15 seconds and 30 seconds,
respectively.
Configuring BGP soft-reset
After modifying the route selection policy, you have to reset BGP connections to make the new one take
effect.
The current BGP implementation supports the route-refresh feature that enables dynamic route refresh
without tearing down BGP connections.
However, if a peer not supporting route-refresh exists in the network, you need to configure the peer
keep-all-routes command to save all routes from the peer, which are used during applying the new route
selection policy.
1. Configure automatic soft-reset.
After route refresh is enabled for peers and a policy is modified, the router advertises a
route-refresh message to the peers, which then resend their routing information to the router. After
receiving the routing information, the router performs dynamic route update by using the new
policy.
To enable BGP route refresh for a peer/peer group:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Enable BGP route refresh for a
peer/peer group. peer { group-name | ip-address }
capability-advertise route-refresh Optional.
Enabled by default.
2. Configure manual soft-reset.