Specifying The Source Address Of Tcp Connections - HP VSR1000 Configuration Manual

Step
7. Enable the router to exchange
IPv6 unicast routing
information used for RPF check
with peers in the specified
peer group.

Specifying the source address of TCP connections

By default, BGP uses the primary IP/IPv6 address of the egress interface in the optimal route to a peer
or peer group as the source address of TCP connections to the peer or peer group. You can change the
source address in the following scenarios:
• If the peer's IP/IPv6 address belongs to an interface indirectly connected to the local router, you
must specify that interface as the source interface for TCP connections on the peer. For example,
interface A on the local end is directly connected to interface B on the peer. If you use the peer
x.x.x.x as-number as-number command on the local end, and x.x.x.x is not the IP address of
interface B, you must do the following:
a. Use the peer connect-interface command on the peer.
b. Specify the interface whose IP address is x.x.x.x as the source interface.
• If the source interface fails on a BGP router that has multiple links to a peer, BGP must reestablish
TCP connections. To avoid this problem, use a loopback interface as the source interface or use the
IP address of a loopback interface as the source address.
If the BGP sessions use the IP addresses of different interfaces, specify a source address or source
•
interface for each peer to establish multiple BGP sessions to a router. Specify a source address for
each peer if the BGP sessions use the different addresses of the same interface. Otherwise, the local
BGP router might fail to establish a TCP connection to a peer when it uses the optimal route to
determine the source address.
To specify the source address of TCP connections (IPv4 unicast/multicast address family):
Step
1. Enter system view.
2. Enter BGP view or BGP-VPN
instance view.
3. Specify the source IPv4
address of TCP connections to
a peer or peer group.
4. Specify the source interface
for establishing TCP
connections to a peer or peer
group.
To specify the source address of TCP connections (IPv6 unicast/multicast address family):
Command
peer group-name enable
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
peer { group-name | ip-address }
source-address source-ip-address
peer { group-name | ip-address }
connect-interface interface-type
interface-number
208
Remarks
By default, the router cannot
exchange IPv6 unicast routing
information used for RPF check with
the peers.
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.