Configuring Ipv4 Is-Is Route Summarization - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
<HUAWEI> display isis lsdb
LSPID
-------------------------------------------------------------------------------
1111.1111.1111.00-00* 0x00000005
2222.2222.2222.00-00
2222.2222.2222.01-00
Total LSP(s): 3
Run the display isis route command to check IS-IS routing information. If equal-cost IS-IS
routes are configured to work in load-balancing mode, multiple next hops will be displayed in
the command output. For example, two next hops, 10.1.1.2 and 10.1.2.2, to the 172.17.1.0/24
network segment are displayed, and their route costs are both 30.
<HUAWEI> 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

7.5 Configuring IPv4 IS-IS Route Summarization

To improve the route searching efficiency and simplify route management on a large-scale IS-
IS network, configure IS-IS route summarization to reduce the number of IS-IS routes in a
routing table.
Context
Route summarization is used to summarize routes with the same IP prefix into one route.
On a large-scale IS-IS network, route summarization can be configured to reduce the number
of IS-IS routes in a routing table. This summarization improves the usage of system resources
and facilitates route management.
If a link on an IP network segment that is summarized frequently alternates between Up and
Down states, IP network segments that are not summarized will not be affected, preventing route
flapping and improving the network stability.
Issue 02 (2014-09-30)
Database information for ISIS(1)
--------------------------------
ATTENTION :: System is overloaded
Manual overload set
System Memory Low
Seq Num
0x0000016317
0x00000001
*(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
ATT-Attached, P-Partition, OL-Overload
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.
YES OverLoad on Startup
NO Memory Allocate Failure NO
Level-1 Link State Database
Checksum
0xb258
0xd2fd
0xdcb2
Route information for ISIS(1)
-----------------------------
ExtCost ExitInterface
NULL Pos2/0/0
NULL Pos1/0/0
NULL GE3/0/0
NULL Pos1/0/0
Pos2/0/0
NULL Pos2/0/0
NULL Pos1/0/0
U-Up/Down Bit Set
7 IS-IS Configuration
NO
Holdtime Length
1193 68
1167 84
449 55
NextHop
10.1.2.2
Direct
Direct
10.1.1.2
10.1.2.2
Direct
10.1.1.2
ATT/P/OL
0/0/1
1/0/0
0/0/0
Flags
A/-/L/-
D/-/L/-
D/-/L/-
A/-/L/-
D/-/L/-
A/-/L/-
538