Configuring Bgp To Advertise Routes - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Example
# Run the display bgp paths command to view information about AS_Path attributes of routes.
<HUAWEI> display bgp paths
Total Number of Routes: 10
Total Number of Paths: 7
# Run the display bgp routing-table 60.0.0.35 command to view information about a specified
BGP route.
<HUAWEI> display bgp routing-table 60.0.0.35
BGP local router ID : 30.0.0.35
Local AS number : 400
Paths:
BGP routing table entry information of 60.0.0.35/32:
Network route.
From: 0.0.0.0 (0.0.0.0)
Route Duration: 3d04h00m12s
Direct Out-interface: InLoopBack0
Original nexthop: 127.0.0.1
Qos information : 0x0
AS-path Nil, origin igp, MED 0, pref-val 0, valid, local, best, select, pre 0
Not advertised to any peer yet

8.5 Configuring BGP to Advertise Routes

BGP is used to transmit routing information. BGP advertises only the wanted routes after filtering
routes to be advertised, and modifies route attributes to direct network traffic.
8.5.1 Before You Start
Before configuring BGP to advertise routes, familiarize yourself with the usage scenario,
complete the pre-configuration tasks, and obtain the data required for the configuration.
Applicable Environment
BGP is used to transmit routing information between ASs. Route advertisement directly affects
traffic forwarding.
There are usually a large number of routes in a BGP routing table. Transmitting a great deal of
routing information brings a heavy load to devices. Routes to be advertised need to be controlled
to address this problem. You can configure devices to advertise only routes that these devices
want to advertise or routes that their peers require.
Multiple routes to the same destination may exist and traverse different ASs. Routes to be
advertised need to be filtered in order to direct routes to specific ASs.
Issue 02 (2014-09-30)
Address Refcount MED Path/Origin
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