Use this command to configure a BGP router to send 4-octet ASN capabilities. If attempting to change the AS capability from 2 to 4 or 4 to 2, a prompt occurs to remove the VRF configuration (if it exists), and reconfiguration is required, because the route distinguisher (RD) configuration would have been created with the current (2 octet or 4 octet) capability, and must be reconfigured before attempting to change the capability.

While loading from a saved configuration with AS4 capability and BGP VRF configuration, the capability will not be changed because of the above described reason.

Use the no parameter with this command to prevent a BGP router from sending 4-octet ASN capabilities.

None

By default, the bgp extended ASN capability and Four-octet capabilities are disabled.

Configure mode

This command was introduced before OcNOS version 1.3.