Huawei quidway s7700 Configuration Manual page 125

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
l
Issue 01 (2011-07-15)
This Step is used for the networking scenario where physically-dispersed CEs use the
same AS number. The configuration is performed on the PE.
CAUTION
In the case of multi-homed CE, the BGP AS substitution function may lead to route
loops.
NOTE
Compared with the BGP view, the BGP-VPN instance view does not support the following
commands:
l BGP confederation: confederation
l BGP graceful restart: graceful-restart
l Router ID of BGP: router-id
l Synchronization between BGP and IGP: synchronization
l BGP timer: timer
Do as follows on the CE:
1. Run:
system-view
The system view is displayed.
2. Run:
bgp as-number
The BGP view is displayed.
3. Run:
peer ipv4-address as-number as-number
The PE is specified as the peer of the VPN.
4. (Optional) Run:
peer { ipv4-address | group-name } ebgp-max-hop [ hop-count ]
The maximum number of hops is configured for the EBGP connection.
Generally, one or multiple directly-connected physical link(s) exist between a pair of
EBGP peers. If not, you must use the peer ebgp-max-hop command to ensure that
the TCP connection can be set up between the EBGP peers through multiple hops.
5. Run:
import-route { direct | static | rip process-id | ospf process-id | isis
process-id } [ med med | route-policy route-policy-name ]*
Routes of the local site are imported.
The CE must advertise the reachable VPN segment addresses to the attached PE.
Through the PE, the addresses are advertised to the remote CEs. In applications, the
types of routes to be imported may be different.
Configure IBGP between a PE and a CE.
Do as follows on the PE:
1. Run:
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3 BGP MPLS IP VPN Configuration
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