H3C Technologies H3C S10500 Series Switches - Manual (Page 261)

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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.
Follow these steps to perform soft reset through route refresh:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Enable BGP route refresh for a
peer or a peer group peer { group-name | ip-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 ipv4 multicast command to soft-reset MBGP
connections to refresh the MBGP routing table and apply the new policy without terminating MBGP
connections.
Follow these steps to perform a manual soft reset:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Disable BGP route refresh and
multiprotocol extensions for a peer
or a peer group
peer { group-name | ip-address }
capability-advertise conventional Optional
Enabled by default.
Enter IPv4 MBGP address family
view
ipv4-family multicast —
Keep all original routes from a
peer or a peer group regardless of
whether they pass the inbound
filtering policies
peer { group-name | ip-address }
keep-all-routes
Required
Not kept by default.
Return to user view return —
Soft-reset MBGP connections
manually
refresh bgp ipv4 multicast { all |
ip-address | group group-name |
external | internal } { export |
import }
Optional
Enabling the MBGP ORF capability
The MBGP Outbound Router Filter (ORF) feature enables an MBGP speaker to send a set of ORFs to its
MBGP 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 MBGP speaker, reducing update messages and saving
network resources.
After you enable the BGP ORF capability, the local BGP router negotiates the ORF capability with the
BGP peer through Open messages. That is, the BGP router determines whether to carry ORF information
in messages and, if so, whether to carry nonstandard ORF information in the packets. After completing
the negotiation process and establishing the neighboring relationship, the BGP router and its BGP peer
can exchange ORF information through specific route-refresh messages.