6-50
By default, BGP uses the outbound interface of the best route to the BGP peer/peer group as the
source interface for establishing a TCP connection to the peer/peer group.
Note that:
z
Suppose interface A on the local device is connected to interface B on the peer device. When
using the
peer
x.x.x.x
as-number
as-number
command on the local device but x.x.x.x is not the
IP address of interface B
, you need to execute the
peer connect-interface
command on the peer
to specify the source interface, that is, the owner of IP address x.x.x.x, for establishing TCP
connections.
z
To establish multiple BGP connections to another BGP router, you need to specify on the local
router the respective source interfaces for establishing TCP connections to the peers on the
peering BGP router; otherwise, the local BGP router may fail to establish TCP connections to the
peers when using the outbound interfaces of the best routes as the source interfaces.
Examples
# In BGP view, specify loopback 0 as the source interface for routing updates to the peer group
test
.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test connect-interface loopback 0
# In BGP-VPN instance view, specify loopback 0 as the source interface for routing updates to the
peer group
test
(the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test connect-interface loopback 0
peer default-route-advertise (BGP/BGP-VPN instance view)
Syntax
peer
{
group-name
|
ip-address
}
default-route-advertise
[
route-policy route-policy-name
]
undo peer
{
group-name
|
ip-address
}
default-route-advertise
View
BGP view, BGP-VPN instance view
Default Level
2: System level
Parameters
group-name
: Name of a peer group, a string of 1 to 47 characters.
ip-address
: IP address of a peer.
route-policy-name
: Routing policy name, a string of 1 to 19 characters.
Description
Use the
peer default-route-advertise
command to advertise a default route to a peer/peer group.
Use the
undo peer default-route-advertise
command to disable default route advertisement to a
peer/peer group.
By default, no default route is advertised to a peer/peer group.
