HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 191
Generating BGP routes
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• On a BGP router that has multiple links to a peer, if the source interface fails, BGP has to reestablish TCP connections. To avoid this problem, use a loopback interface as the source interface. • To establish multiple BGP sessions between two routers, specify the source interface for establishing TCP connections to each peer on the local router. Otherwise, the local BGP router may fail to establish a TCP connection to a peer when using the outbound interface of the best route to the peer as the source interface. To specify the source interface for TCP connections (IPv4): Step 1. Enter system view. 2. Enter BGP view or BGP-VPN instance view. Command system-view • Enter BGP view: bgp as-number • Enter BGP-VPN instance view: a. bgp as-number b. ip vpn-instance vpn-instance-name 3. Specify the source interface for establishing TCP peer { group-name | ip-address } connections to a peer or peer connect-interface interface-type group. interface-number Remarks N/A N/A By default, BGP uses the outbound interface of the best route to the BGP peer or peer group as the source interface for establishing a TCP connection to the peer or peer group. To specify the source interface for TCP connections (IPv6): Step 1. Enter system view. 2. Enter BGP view or BGP-VPN instance view. Command system-view • Enter BGP view: bgp as-number • Enter BGP-VPN instance view: a. bgp as-number b. ip vpn-instance vpn-instance-name 3. Specify the source interface for establishing TCP peer { group-name | connections to a peer or peer ipv6-address } connect-interface group. interface-type interface-number Remarks N/A N/A By default, BGP uses the outbound interface of the best route to the BGP peer or peer group as the source interface for establishing a TCP connection to the peer or peer group. Generating BGP routes BGP can generate routes in the following ways: • Advertise local networks. • Redistribute IGP routes. 180
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