H3C Technologies H3C S7500E Series Switches - Manual (Page 414)

14-12
To do… Use the command… Remarks
Configure updates to a
peer/peer group to carry only
the public AS number
peer { ipv6-group-name |
ipv6-address } public-as-only
Optional
By default, outbound IPv6
MBGP updates can carry private
AS numbers.
Tuning and Optimizing IPv6 MBGP Networks
Configuration Prerequisites
Before tuning and optimizing an OSPF network, perform the following tasks:
z Enable IPv6
z Configure the IPv6 MBGP basic functions
Configuring IPv6 MBGP Soft Reset
After modifying a route selection policy, you have to reset IPv6 MBGP connections to make it
take effect, causing short time disconnections.
After the route-refresh capability is enabled on all IPv6 MBGP routers in a network, when a
route selection policy is modified on a router, the local router can perform dynamic route
updates without tearing down IPv6 MBGP connections.
If the peer does not support route-refresh, you can save all route updates from the peer. When
the route selection policy changes, you can refresh the IPv6 MBGP routing table and apply the
new policy without tearing down IPv6 MBGP connections.
Soft reset through route-refresh
If the peer is enabled with route-refresh, when the IPv6 MBGP route selection policy is modified
on a router, the router advertises a route-refresh message to its IPv6 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 tearing down IPv6
MBGP connections.
Follow these steps to configure IPv6 MBGP soft reset through route-refresh:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Enter IPv6 address family view ipv6-family —
Enable IPv6 BGP route refresh
for a peer/peer group
peer { ipv6-group-name |
ipv6-address }
capability-advertise
route-refresh
Optional
Enabled by default