R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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Disabling BGP route advertisement to a peer or peer group
To disable BGP from sending routing updates to the specified peer or peer group:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Disable BGP from sending
routing updates to the
specified peer or peer group.
peer { group-name | ip-address }
update-no-advertise
By default, BGP sends routing
updates to peers.
IMPORTANT:
The previous configuration does not apply to the default route sent by the peer default-route-advertise
command.
Configuring BGP soft-reset
After modifying the route selection policy, you must reset BGP sessions to make the new policy take effect
and advertise new routes. The router then filters routing information by using the new policy.
The soft-reset feature allows you to refresh the BGP routing table and apply the new route selection policy
without tearing down BGP sessions.
The following soft-reset methods are available:
• Automatic soft-reset—After 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 filters the routing information by using the new policy.
This method requires that both the local router and the peer support route refresh.
• Manual soft-reset—Use the peer keep-all-routes command to save all route updates from the peer.
After modifying the route selection policy, use the refresh bgp command to filter routing information
by using the new policy.
This method uses more memory resources to save routes and does not require that the local router
and the peer support route refresh.
Configuring 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 or peer group:
Step Command Remarks
1. Enter system view.
system-view N/A