3Com Switch 4800G 24-Port - Configuring BGP Basic Functions

Configuring BGP Basic Functions 381
Configuring BGP Basic
Functions
The section describes BGP basic configuration.
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■ This section does not differentiate between BGP and MP-BGP.
■ Since BGP employs TCP, you need to specify IP addresses of peers, which may
not be neighboring routers.
■ Using logical links can also establish BGP peer relationships.
■ In general, IP addresses of loopback interfaces are used to improve stability of
BGP connections.
Prerequisites The neighboring nodes are accessible to each other at the network layer.
Configuration Procedure Follow these steps to configure BGP basic functions:
“Configuring a Large Scale BGP
Network” on page 390
“Configuring BGP Peer Groups” on
page 390
Optional
“Configuring BGP Community” on
page 391
Optional
“Configuring a BGP Route Reflector”
on page 392
Optional
“Configuring a BGP Confederation”
on page 392
Optional
“Configuring BGP GR” on page 392 Optional
Task Remarks
To do… Use the command… Remarks
Enter system view system-view -
Enable BGP and enter BGP
view
bgp as-number Required
Not enabled by default
Specify a Router ID router-id ip-address Optional
If no IP addresses are
configured for loopback
interface and other interfaces,
the task becomes required.
Specify the AS number of a
peer or a peer group
peer { group-name |
ip-address } as-number
as-number
Required
Not specified by default
Configure a description for a
peer or a peer group
peer { group-name |
ip-address } description
description-text
Optional
Not configured by default
Enable IPv4 unicast address
family for all peers
default ipv4-unicast Optional
Enabled by default
Enable a peer peer ip-address enable Optional
Enabled by default
Ignore a peer or peer group peer { group-name |
ip-address } ignore
Optional
Not ignored by default