Huawei Quidway NetEngine80E Configuration Manual page 68

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
4.
After the preceding configurations are complete, each AGG advertises the route destined for
each NodeB to its BGP VPNv4 peers (RSGs). The RSGs can receive two routes with the same
prefix (destined for the same NodeB) and select an optimal route with a smaller MED value
from the two routes. Consequently, RSGs select routes advertised by AGG1 as the primary routes
to CSG1 and CSG2 and routes advertised by AGG2 as the primary routes to CSG3 and CSG4.
The AGGs therefore load-balance RNC-to-CSG traffic.
Pre-configuration Tasks
Before configuring AGGs to load-balance RNC-to-CSG traffic, configure link-layer protocol
parameters and IP addresses for interfaces and ensure that the link layer protocol on each
interface is Up.
Data Preparation
To complete the configuration, you need the following data:
No.
1
Procedure
Step 1 Configure the AGGs to advertise ARP Vlink direct routes.
1.
2.
3.
4.
Issue 02 (2014-09-30)
NOTE
After this configuration is complete, each static route is iterated to an ARP Vlink direct route that is
generated on an L3VE sub-interface, and the static route inherits the cost of the ARP Vlink direct route.
Because no cost is configured for ARP Vlink direct routes on the L3VE sub-interface of the primary PW,
the default cost 0 takes effect on these routes, and static routes inherit the cost 0 after they are iterated to
the ARP Vlink direct routes.
Import the static routes to the BGP routing table.
NOTE
After a static route is imported to the BGP routing table, the cost is changed to the BGP route Multi-Exit
discrimination (MED), but the value remains unchanged. The cost of the static route to one NodeB varies
with the AGG, so does the BGP route MED.
Data
Cost for ARP Vlink direct routes and routes to the directly connected network segment
on the L3VE sub-interface of the secondary PW
Run:
system-view
The system view is displayed.
Run:
ip vpn-instance vpn-instance
The VPN instance view is displayed.
Run:
arp vlink-direct-route advertise
The AGG is configured to advertise ARP Vlink direct routes.
Run:
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1 IP Routing Basic Configuration
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