486
Step
Command
Remarks
considering the AS path
during best route selection.
Enabled by default.
6.
Configure updates to a peer
or a peer group to carry only
the public AS number in the
AS path of routes.
peer
{
ipv6-group-name
|
ipv6-address
}
public-as-only
Optional.
Outbound IPv6 MBGP updates
carrying private AS numbers by
default.
Tuning and optimizing IPv6 MBGP networks
Refer to the following information for more details about optimizing IPv6 MBGP networks.
Configuration prerequisites
Before you optimize an OSPF network, complete the following tasks:
•
Enable IPv6.
•
Configure basic IPv6 MBGP.
Configuring IPv6 MBGP soft reset
After you modify a route selection policy, you must reset IPv6 MBGP connections to make the new
one take effect.
The current IPv6 MBGP implementation supports the route-refresh feature that enables dynamic
route refresh without terminating IPv6 MBGP connections.
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 will update the IPv6 MBGP routing table and apply the new policy.
Performing soft reset through route refresh
When the peer is enabled with route refresh, and the IPv6 MBGP route selection policy is modified
on a router, the router advertises a route-refresh message to its IPv6 MBGP peers. The IPv6 MBGP
peers resend their routing information to the router after they receive the message. Therefore, the
local router can perform dynamic route update and apply the new policy without terminating IPv6
MBGP connections.
To configure IPv6 MBGP soft reset through route refresh:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP view.
bgp
as-number
N/A
3.
Enter IPv6 address family
view.
ipv6-family
N/A
4.
Enable IPv6 BGP route
refresh for a peer or a peer
group.
peer
{
ipv6-group-name
|
ipv6-address
}
capability-advertise
route-refresh
Optional.
Enabled by default.
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 ipv6 multicast
command to
