Cisco Cisco IOS Software Release 12.2(14)S

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页码 12
      BGP Next Hop Propagation
How to Configure BGP Next Hop Propagation
3
Cisco IOS Release 12.0(16)ST, 12.2, 12.2(14)S, and 12.0(22)S
Turn off the next hop calculation for an eBGP peer. This feature is useful for configuring the 
end-to-end connection of a label-switched path.
How to Configure BGP Next Hop Propagation
This section contains the following procedures:
 (required)
 (optional) 
Configuring the Route Reflector 
In this section, the following tasks are completed:
A route map is created to set the next hop that will be advertised to the router reflector client. The 
route map is applied only to outbound routes. 
eBGP peering is configured with the route reflector client. 
Restrictions
Do not use the neighbor next-hop-self command to modify the next hop attribute for a route reflector 
when this feature is enabled for a route reflector client.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
route-map map-tag [permit | deny] [sequence-number]
4.
set ip next-hop ip-address [peer-address]
5.
exit 
6.
router bgp as-number 
7.
address-family ipv4 [mdt | multicast | tunnel | unicast [vrf vrf-name] | vrf vrf-name
8.
neighbor ip-address activate 
9.
neighbor ip-address ebgp-multihop ttl 
10.
neighbor ip-address route-reflector-client
11.
neighbor ip-address route-map map-tag in | out
12.
end