Configuring Bgp Basic Functions; Prerequisites; Creating A Bgp Connection - 3Com S7906E Configuration Manual

Configuring BGP Basic Functions

This section does not differentiate between BGP and MP-BGP.

Prerequisites

The neighboring nodes are accessible to each other at the network layer.

Creating a BGP Connection

A router ID is the unique identifier of a BGP router in an AS.
To ensure the uniqueness of a router ID and enhance network reliability, you can specify in BGP
view the IP address of a local loopback interface as the router ID.
If no router ID is specified in BGP view, the global router ID is used. For information about global
router ID, refer to IP Routing Basics in the IP Routing Volume.
If the global router ID is used and then it is removed, the system will select a new router ID.
If the router ID is specified in BGP view, using the undo router-id command can make the system
select a new router ID.
Follow these steps to create a BGP connection:
To do...
Enter system view
Enable BGP and enter BGP
view
Specify a Router ID
Specify a peer or a peer group
and its AS number
Enable the default use of IPv4
unicast address family for the
peers that are established
using the peer as-number
command
Enable a peer
Configure a description for a
peer/peer group
Use the command...
system-view
bgp as-number
router-id ip-address
peer { group-name |
ip-address } as-number
as-number
default ipv4-unicast
peer ip-address enable
peer { group-name |
ip-address } description
description-text
1-18
Remarks
—
—
Not enabled by default
Optional
By default, the global router ID is
used.
Required
Not specified by default
Optional
Enabled by default
Optional
Enabled by default
Not configured by default.