ISIS多区域实验简述

为支持大型路由网络，IS-IS在路由域内采用两级分层结构。 IS-IS网络中三种级别的路由设备：将Level-1路由设备部署在区域内，Level-2路由设备部署在区域间，Level-1-2路由设备部署在Level-1和Level-2路由设备的中间。

实验拓扑图：
在这里插入图片描述

实验基础配置：

r1:
sys
sysname r1
undo info enable
int g0/0/0
ip add 12.1.1.1 16
quit
int g0/0/1
ip add 13.1.1.1 16
quit
int loopb 0
ip add 1.1.1.1 32
quit

isis
network-entity 49.0123.0000.0000.0001.00 配置49.0123区域net地址
is-level level-1
cost-style wide
quit
int g0/0/0
isis enable
quit
int g0/0/1
isis enable
quit
int loopb 0
isis enable
quit

r2:
sys
sysname r2
undo info enable
int g0/0/0
ip add 24.1.1.2 16
quit
int g0/0/1
ip add 12.1.1.2 16
quit
int loopb 0
ip add 2.2.2.2 32
quit

isis
network-entity 49.0123.0000.0000.0002.00 配置49.0123区域net地址
cost-style wide
quit
int g0/0/0
isis enable
quit
int g0/0/1
isis enable
quit
int loopb 0
isis enable
quit

r3:
sys
sysname r3
undo info enable
int g0/0/0
ip add 13.1.1.3 16
quit
int g0/0/1
ip add 35.1.1.3 16
quit
int loopb 0
ip add 3.3.3.3 32
quit

isis
network-entity 49.0123.0000.0000.0003.00 配置49.0123区域net地址
cost-style wide
quit
int g0/0/0
isis enable
quit
int g0/0/1
isis enable
quit
int loopb 0
isis enable
quit

r4:
sys
sysname r4
undo info enable
int g0/0/0
ip add 45.1.1.4 16
quit
int g0/0/1
ip add 24.1.1.4 16
quit
int loopb 0
ip add 4.4.4.4 32
quit

isis
network-entity 11.0123.0000.0000.0004.00 配置11.0123区域net地址
is-level level-2
cost-style wide
quit
int g0/0/0
isis enable
quit
int g0/0/1
isis enable
quit
int loopb 0
isis enable
quit

r5:
sys
sysname r5
undo info enable
int g0/0/0
ip add 35.1.1.5 16
quit
int g0/0/1
ip add 45.1.1.5 16
quit
int loopb 0
ip add 5.5.5.5 32
quit
isis
network-entity 11.0123.0000.0000.0005.00 配置11.0123区域net地址
is-level level-2
cost-style wide
quit
int g0/0/0
isis enable
quit
int g0/0/1
isis enable
quit
int loopb 0
isis enable
quit