Specifying The Source Interface For Tcp Connections - HP MSR Series Configuration Manual

Step
6. Enable the default use of IPv4
unicast address family for the
peers that are established
using the peer as-number
command.
7. Enable a peer.
8. Configure a description for a
peer group.
To configure an EBGP peer group by using Method 3:
Step
1. Enter system view.
2. Enter BGP view or BGP-VPN
instance view.
3. Create an EBGP peer group.
4. Add a peer into the EBGP
peer group.
5. Enable a peer.
6. Configure a description for a
peer group.

Specifying the source interface for TCP connections

By default, 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, and it uses the primary IP address
of the output interface as the source IP address of TCP connections. You can change the source interface
(primary IP address) for TCP connections in the following scenarios:
If the peer's IP 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 execute the peer x.x.x.x
as-number as-number command in which x.x.x.x is not the IP address of interface B on the local
end, you must use the peer connect-interface command on the peer to specify the interface whose
IP address is x.x.x.x as the source interface for establishing a TCP connection.
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.
Command
default ipv4-unicast
peer ip-address enable
peer group-name description
description-text
Command
system-view
•
Enter BGP view:
bgp as-number
•
Enter BGP-VPN instance view:
a. bgp as-number
b. ipv4-family vpn-instance
vpn-instance-name
group group-name external
peer ip-address group group-name
as-number as-number
peer ip-address enable
peer group-name description
description-text
184
Remarks
Optional.
Enabled by default.
This command is not supported in
BGP-VPN instance view.
Optional.
Enabled by default.
Optional.
By default, no description is
configured for the peer group.
Remarks
N/A
Use either method.
N/A
N/A
Optional.
Enabled by default.
Optional.
By default, no description is
configured for the peer group.