R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

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Step 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. ip vpn-instance

vpn-instance-name

N/A

3. Configure GTSM for the

specified BGP peer or peer

group.

peer { group-name | ipv6-address }

ttl-security hops hop-count

By default, GTSM is not

configured.

Configuring BGP soft-reset

After you modify the route selection policy (for example, modify the preferred value), you must reset BGP

sessions to apply the new policy. The reset operation tears down and reestablishes 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. The peer then resends its routing

information. After receiving the routing information, the router filters the routing information by

using the new policy.