HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Routing Confi - Page 160
Enabling 4-byte AS number suppression, Command, Remarks, Local parameter, Peer parameter
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whether to carry non-standard 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. For the parameters configured on both sides for ORF capability negotiation, see Table 5. To enable the BGP ORF capability: Step Command 1. Enter system view. system-view 2. Enter BGP view. bgp as-number 3. Enable BGP route refresh for a peer { group-name | ip-address } peer or peer group. capability-advertise route-refresh 4. Enable the non-standard ORF peer { group-name | ip-address } capability for a BGP peer or capability-advertise orf peer group. non-standard 5. Enable the ORF capability for peer { group-name | ip-address } a BGP peer or peer group. capability-advertise orf ip-prefix { both | receive | send } Remarks N/A N/A Enabled by default. 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. Disabled by default. Table 5 Description of the both, send, and receive parameters and the negotiation result Local parameter send Peer parameter • receive • both Negotiation result The ORF sending capability is enabled locally and the ORF receiving capability is enabled on the peer. receive both • send • both both The ORF receiving capability is enabled locally and the ORF sending capability is enabled on the peer. Both the ORF sending and receiving capabilities are enabled locally and on the peer. 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. 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. To enable 4-byte AS number suppression: 150