Huawei Quidway NetEngine80E Configuration Manual page 687

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Configuration Roadmap
The configuration roadmap is as follows:
1.
2.
3.
4.
Data Preparation
To complete the configuration, you need the following data:
l
l
l
Procedure
Step 1 Assign an IP address for each router.
This example assumes that you know the configuration method and no details are provided here.
Step 2 Configure basic IS-IS functions.
For details about the configuration of basis IS-IS functions, see
Basic IS-IS
Step 3 Cancel load balancing on Router A.
[RouterA] isis 1
[RouterA-isis-1] maximum load-balancing 1
[RouterA-isis-1] quit
# Check the routing table of Router A.
[RouterA] display isis route
IPV4 Destination
-------------------------------------------------------------------------
192.168.1.0/24
10.1.1.0/24
172.16.1.0/24
172.17.1.0/24
10.1.2.0/24
192.168.0.0/24
As shown in the routing table, when the maximum number of equal-cost routes for load balancing
is set to 1, the next hop to network segment 172.17.1.0 is 10.1.1.2. This is because the system
ID of Router B is small. IS-IS chooses the route with the next hop being 10.1.1.2 as the unique
optimal route.
Step 4 Restore the default number of load balancing paths on Router A.
[RouterA] isis 1
Issue 02 (2014-09-30)
Enable basic IS-IS functions on each router to implement interconnection.
Cancel load balancing and check the routing table.
Configure load balancing on Router A and check the routing table of it.
(Optional) Configure the preference for equal-cost routes on Router A.
Levels and the area addresses of the four routers.
Number of load balancing paths on Router A is 1.
Preference value of equal-cost routes on Router C is 1.
Functions.
ISIS(1) Level-2 Forwarding Table
--------------------------------
IntCost
20
10
10
30
10
20
Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Route information for ISIS(1)
-----------------------------
ExtCost ExitInterface
NULL P2/0/0
NULL P1/0/0
NULL GE3/0/0
NULL P1/0/0
NULL P2/0/0
NULL P1/0/0
U-Up/Down Bit Set
7 IS-IS Configuration
7.24.1 Example for Configuring
NextHop Flags
10.1.2.2 A/-/L/-
Direct D/-/L/-
Direct D/-/L/-
10.1.1.2 A/-/L/-
Direct D/-/L/-
10.1.1.2 A/-/L/-
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