H3C Technologies H3C SecPath F1000-E - Manual (Page 491)

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Step Command Remarks
4. Enable the non-standard ORF
capability for a BGP peer/peer
group.
peer { group-name | ip-address }
capability-advertise orf
non-standard
Optional.
By default, standard BGP ORF
capability defined in RFC
5291 and RFC 5292 is
supported.
If the peer supports only
non-standard ORF, you need
to configure this command.
5. Enable the ORF capability for a
BGP peer/peer group.
peer { group-name | ip-address }
capability-advertise orf ip-prefix
{ both | receive | send } Disabled by default.
Table 70 Description of the both, send, and receive parameters and the negotiation result
Local parameter Peer parameter Negotiation result
send
• receive
• both
The ORF sending capability is enabled locally and
the ORF receiving capability is enabled on the peer.
receive
• send
• both
The ORF receiving capability is enabled locally and
the ORF sending capability is enabled on the peer.
both both
Both the ORF sending and receiving capabilities are
enabled locally and on the peer, respectively.
Enabling 4-byte AS number suppression
The device supports 4-byte AS numbers and uses 4-byte AS numbers by default. If the peer devices
support only 2-byte AS numbers, you must enable the 4-byte AS number suppression function on the
device.
To enable 4-byte AS number suppression:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Enable 4-byte AS number
suppression.
peer { group-name | ip-address }
capability-advertise
suppress-4-byte-as
Disabled by default.
NOTE:
If the peer device supports 4-byte AS numbers, do not enable the 4-byte AS number suppression function;
otherwise, the BGP peer relationship cannot be established.
Enabling quick EBGP session reestablishment
If the router receives no keepalive messages from a BGP peer within the holdtime, it disconnects from the
peer.
With quick EBGP connection reestablishment enabled, the router, when the link to a directly connected
EBGP peer is down, will reestablish a session to the EBGP peer immediately.