Starting A Bgp Process - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing

8.3.2 Starting a BGP Process

Starting a BGP process is a prerequisite for configuring basic BGP functions. When starting a
BGP process on a device, specify the number of the AS to which the device belongs.
Context
Perform the following steps on the router where a BGP connection needs to be established:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bgp { as-number-plain | as-number-dot }
BGP is enabled (the local AS number is specified), and the BGP view is displayed.
Step 3 (Optional) Run:
router-id ipv4-address
A router ID is set.
Configuring or changing the router ID of BGP causes the BGP peer relationship between
routers to be reset.
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8.3.3 Configuring BGP Peers
Two devices can exchange BGP routing information only after a peer relationship is establishsd
between them.
Context
Because BGP uses TCP connections, you need to specify IP addresses for peers when
configuring BGP. Two BGP peers are not necessarily neighbors of each other. Such BGP peers
establish a BGP peer relationship through a logical link. Using loopback interface addresses to
set up BGP peer relationships improves the stability of BGP connections, and therefore is
recommended.
IBGP peer relationships are established between devices within an AS. EBGP peer relationships
are established between devices in different ASs.
Procedure
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Issue 02 (2014-09-30)
NOTE
To enhance network reliability, configuring a loopback interface address as the router ID is recommended.
If no router ID is set, BGP automatically selects the router ID in the system view as the router ID of BGP.
For the rule for selecting a router ID in the system view, see the router-id command .
Configure an IBGP peer.
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