F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100
496
Ste
p
Command
Remarks
596. Enter system view. system-view N/A
597. Enter BGP view or BGP-VPN
instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance view:
a. bgp as-number
b. ipv4-family vpn-instance
vpn-instance-name
Use either approach.
598. Forbid session establishment
with a peer or peer group.
peer { group-name | ip-address } ignore Not forbidden by default.
1512BConfiguring BGP soft-reset
After you modify the route selection policy, you must reset BGP sessions to apply the new policy. The reset
operation tears down and re-establishes BGP sessions.
To avoid tearing down BGP sessions, you can use one of the following soft-reset methods to apply the
new policy:
• Enabling route-refresh—The BGP router advertises a route-refresh message to the specified peer
and the peer resends its 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.
• Saving updates—Use the peer keep-all-routes command to save all route updates from the
specified peer. After modifying the route selection policy, filter routing information by using the new
policy.
This method does not require that the local router and the peer support route refresh but it uses
more memory resources to save routes.
• Manual soft-reset—Use the refresh bgp command to enable BGP to send local routing information
or advertise a route-refresh message to the specified peer so the peer resends its routing information.
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.
1. Enabling route-refresh
To enable BGP route refresh for a peer or peer group:
Ste
p
Command
Remarks
599. Enter system view.
system-view N/A
600. Enter BGP view or
BGP-VPN instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance view:
a. bgp as-number
b. ipv4-family vpn-instance
vpn-instance-name
Use either approach.
601. Enable BGP route refresh
for a peer or peer group.
peer { group-name | ip-address }
capability-advertise route-refresh
Optional.
Enabled by default.