Specifying the source interface for establishing TCP connections
IPv6 BGP uses TCP as the transport layer protocol. By default, IPv6 BGP uses the output interface of the optimal route to a peer or peer group as the source interface for establishing TCP connections to the peer or peer group.
If an IPv6 BGP router has multiple links to a peer, and the source interface fails, IPv6 BGP has to reestablish TCP connections, causing network oscillation. To enhance stability of IPv6 BGP connections, Hewlett Packard Enterprise recommends using a loopback interface as the source interface.
To establish a BGP connection, specify on the local router the source interface for establishing the TCP connection to the peer on the peering BGP router. Otherwise, the local BGP router may fail to establish TCP connection to the peer when using the outbound interface of the best route as the source interface.
To specify the source interface for establishing TCP connections to a BGP peer or peer group:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter BGP view. | bgp as-number | N/A |
3. Enter IPv6 address family view. | ipv6-family | N/A |
4. Specify the source interface for establishing TCP connections to an IPv6 BGP peer or peer group. | peer { ipv6-group-name | ipv6-address } connect-interface interface-type interface-number | By default, IPv6 BGP uses the outbound interface of the best route to the IPv6 BGP peer or peer group as the source interface for establishing a TCP connection. |