HP VPN Firewall Appliances Network Management Configuration Guide

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Forbidding session establishment with a peer or peer group

This task allows you to temporarily tear down the BGP session to a specific peer or peer group. To recover

the session, execute the undo peer ignore command. In this way, you can implement network upgrade

and maintenance without deleting and then configuring the peer or peer group.

To forbid session establishment with a peer or peer group:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. 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 method.

3. Forbid session establishment

with a peer or peer group.

peer { group-name | ip-address } ignore Not forbidden by default.

Configuring 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