neighbor disable-connected-check
To disable connection verification to establish an eBGP peering session with a single-hop peer that uses a loopback interface, use the neighbor disable-connected-check command in address family or router configuration mode. To enable connection verification for eBGP peering sessions, use the noform of this command.
neighbor {ip-address | peer-group-name} disable-connected-check
no neighbor {ip-address | peer-group-name} disable-connected-check
Syntax Description
ip-address
|
IP address of a neighbor.
|
peer-group-name
|
Name of a BGP peer group.
|
Command Default
A BGP routing process will verify the connection of single-hop eBGP peering session (TTL=254) to determine if the eBGP peer is directly connected to the same network segment by default. If the peer is not directly connected to same network segment, connection verification will prevent the peering session from being established.
Command Modes
Address family
Router configuration
Command History
Release
|
Modification
|
|---|
12.0(22)S
|
This command was introduced.
|
12.2(13)T
|
This command was integrated into Cisco IOS Release 12.2(13)T.
|
Usage Guidelines
The neighbor disable-connected-check command is used to disable the connection verification process for eBGP peering sessions that are reachable by a single hop but are configured on a loopback interface or otherwise configured with a non-directly connected IP address.
This command is required only when the neighbor ebgp-multihop command is configured with a TTL value of 1. The address of the single-hop eBGP peer must be reachable. The neighbor update-source command must be configured to allow the BGP routing process to use the loopback interface for the peering session.
No comments:
Post a Comment