HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Command Referenc - Page 287
peer capability-advertise suppress-4-byte-as
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Related commands • display bgp peer ipv4 unicast • display bgp peer ipv6 unicast • peer capability-advertise conventional • peer keep-all-routes • refresh bgp ipv4 unicast • refresh bgp ipv6 unicast peer capability-advertise suppress-4-byte-as Use peer capability-advertise suppress-4-byte-as to enable 4-byte AS number suppression. Use undo peer capability-advertise suppress-4-byte-as to disable the function. Syntax peer { group-name | ip-address | ipv6-address } capability-advertise suppress-4-byte-as undo peer { group-name | ip-address | ipv6-address } capability-advertise suppress-4-byte-as Default The 4-byte AS number suppression function is disabled. Views BGP view, BGP-VPN instance view Predefined user roles network-admin Parameters group-name: Specifies a peer group by its name, a case-sensitive string of 1 to 47 characters. The peer group must have been created. ip-address: Specifies a peer by its IP address. The peer must have been created. ipv6-address: Specifies a peer by its IPv6 address. The peer must have been created. Usage guidelines BGP supports 4-byte AS numbers. The 4-byte AS number occupies four bytes, in the range of 1 to 4294967295. By default, a device sends an Open message to the peer device for session establishment. The Open message indicates that the device supports 4-byte AS numbers. If the peer device does not support 4-byte AS numbers (supports only 2-byte AS numbers), the session cannot be established. To resolve this issue, enable the 4-byte AS number suppression function. The device then sends an Open message to inform the peer that it does not support 4-byte AS numbers, so the BGP session 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 session cannot be established. Examples # In BGP view, enable 4-byte AS number suppression for peer 1.1.1.1. system-view [Sysname] bgp 100 [Sysname-bgp] peer 1.1.1.1 as-number 100 276