H3C Technologies H3C S10500 Series Switches - Manual (Page 457)

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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
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 they receive the message. Therefore, the local router can perform dynamic
route update and apply the new policy without terminating 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 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, and then use the refresh bgp ipv6 multicast command to soft-reset IPv6
MBGP connections to refresh the IPv6 MBGP routing table and apply the new policy without terminating
IPv6 MBGP connections.
Follow these steps to perform soft reset manually:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Enter IPv6 address family view ipv6-family —
Enter IPv6 MBGP address family
view
ipv6-family multicast —
Keep all routes from a peer or a
peer group regardless of whether
they pass the inbound filtering
policy
peer { ipv6-group-name | ipv6-address }
keep-all-routes Required
Not kept by default.
Perform soft reset manually
refresh bgp ipv6 multicast { all |
ipv6-address | group ipv6-group-name |
external | internal } { export | import }
Optional
Enabling the IPv6 MBGP orf capability
The BGP Outbound Route Filter (ORF) feature enables a BGP speaker to send a set of ORFs to its BGP
peer through route-refresh messages. The peer then applies the ORFs, in addition to its local routing
policies (if any), to filter updates to the BGP speaker, thus reducing the number of exchanged update
messages and saving network resources.