Configuration Prerequisites; Configuring Mbgp Soft Reset - HP MSR ASM Configuration Manual

Configuration prerequisites

Before you configure this task, configure basic MBGP functions.

Configuring MBGP soft reset

After modifying a route selection policy, you have to reset MBGP connections to make it take effect.
The current MBGP implementation supports the route refresh feature that enables dynamic route refresh
without terminating MBGP connections.
However, if a peer that does not support route refresh exists in the network, you must configure the peer
keep-all-routes command to save all routes from the peer. When the routing policy is changed, the
system updates the MBGP routing table and applies the new policy.
Performing soft reset through route refresh
If the peer is enabled with route refresh, when the MBGP route selection policy is modified on a router,
the router advertises a route-refresh message to its MBGP peers, which resend their routing information
to the router after receiving the message. Therefore, the local router can perform dynamic route update
and apply the new policy without terminating MBGP connections.
To perform soft reset through route refresh:
Step
1. Enter system view.
2. Enter BGP view.
3. Enable BGP route refresh for a
peer or a peer group.
Performing soft reset manually
If the peer does not support route refresh, you can use the peer keep-all-routes command to save all the
route updates from the peer. Then, use the refresh bgp ipv4 multicast command to refresh the MBGP
routing table and apply the new policy without terminating MBGP connections.
To perform a manual soft reset:
Step
1. Enter system view.
2. Enter BGP view.
3. Disable BGP route refresh and
multiprotocol extensions for a
peer or a peer group.
4. Enter IPv4 MBGP address
family view.
5. Keep all original routes from a
peer or a peer group
regardless of whether they
pass the inbound filtering
policies.
Command
system-view
bgp as-number
peer { group-name | ip-address }
capability-advertise route-refresh
Command
system-view
bgp as-number
peer { group-name | ip-address }
capability-advertise conventional
ipv4-family multicast
peer { group-name | ip-address }
keep-all-routes
211
Remarks
N/A
N/A
Optional.
Enabled by default.
Remarks
N/A
N/A
Optional.
Enabled by default.
N/A
Not kept by default.