H3C Technologies H3C S10500 Series Switches - Manual (Page 238)

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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 peer group peer { group-name | ip-address }
capability-advertise route-refresh Required
Enabled by default.
Enable the non-standard ORF
capability for a BGP peer or 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.
Enable the ORF capability for a
BGP peer or peer group
peer { group-name | ip-address }
capability-advertise orf ip-prefix
{ both | receive | send }
Required
Disabled by default.
Table 5 Description of the both, send, and receive parameters and the negotiation result
Local parameter Peer parameter Negotiation result
receive
send
both
The ORF sending capability is enabled locally and the
ORF receiving capability is enabled on the peer.
send
receive
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
When a switch that supports 4-byte AS numbers sends an Open message for peer relationship
establishment, the Optional parameters field of the message indicates that the AS number occupies four
bytes—in the range of 1 to 4294967295. If the peer device does not support 4-byte AS numbers (for
examples, it supports only 2-byte AS numbers), the peer relationship cannot be established.
After you enable the 4-byte AS number suppression function, the peer device can then process the Open
message even though it does not support 4-byte AS numbers, and the BGP peer relationship can be
established.
Follow these steps to enable 4-byte AS number suppression:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Enable 4-byte AS number
suppression peer { group-name | ip-address }
capability-advertise suppress-4-byte-as Required
Disabled by default.