配置IS-IS基本功能示例

介绍IS-IS基本功能的配置过程，包括在各设备上指定网络实体名、配置level级别和使能IS-IS。

组网需求

如下图所示：

• DeviceA、DeviceB、DeviceC和DeviceD之间通过IS-IS协议实现IP网络互连。

• DeviceA、DeviceB和DeviceC属于区域10，DeviceD属于区域20。

• DeviceA和DeviceB是Level-1设备，DeviceC是Level-1-2设备，DeviceD是Level-2设备。

配置IS-IS基本功能组网图

 

1、配置各接口的IP地址

设备名称	接口	IP地址
DeviceA	GE0/0/1	10.1.1.2/24
DeviceB	GE0/0/1	10.1.2.2/24
DeviceC	GE0/0/1	10.1.1.1/24
	GE0/0/2	10.1.2.1/24
	GE0/0/3	192.168.0.1/24
DeviceD	GE0/0/1	192.168.0.2/24
	GE0/0/2	172.16.1.1/16
AR2	GE0/0/1	172.6.1.2/16

2、配置ISIS基本功能

#配置DeviceA

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[~DeviceA] isis 1 [*DeviceA-isis-1] is-level level-1 [*DeviceA-isis-1] network-entity 10.0000.0000.0001.00 [*DeviceA-isis-1] quit [*DeviceA] interface gigabitethernet 0/0/1 [*DeviceA-GigabitEthernet0/0/1] isis enable 1 [*DeviceA-GigabitEthernet0/0/1] isis circuit-type p2p [*DeviceA-GigabitEthernet0/0/1] commit [~DeviceA-GigabitEthernet0/0/1] quit

#配置DeviceB

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[~DeviceB] isis 1 [*DeviceB-isis-1] is-level level-1 [*DeviceB-isis-1] network-entity 10.0000.0000.0002.00 [*DeviceB-isis-1] quit [*DeviceB] interface gigabitethernet 0/0/1 [*DeviceB-GigabitEthernet0/0/1] isis enable 1 [*DeviceB-GigabitEthernet0/0/1] isis circuit-type p2p [*DeviceA-GigabitEthernet0/0/1] commit [~DeviceB-GigabitEthernet0/0/1] quit

 # 配置DeviceC。

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[~DeviceC] isis 1 [*DeviceC-isis-1] is-level level-1-2 [*DeviceC-isis-1] network-entity 10.0000.0000.0003.00 [*DeviceC-isis-1] quit [*DeviceC] interface gigabitethernet 0/0/1 [*DeviceC-GigabitEthernet0/0/1] isis enable 1 [*DeviceC-GigabitEthernet0/0/1] isis circuit-type p2p [*DeviceC-GigabitEthernet0/0/1] quit [*DeviceC] interface gigabitethernet 0/0/2 [*DeviceC-GigabitEthernet0/0/2] isis enable 1 [*DeviceC-GigabitEthernet0/0/2] isis circuit-type p2p [*DeviceC-GigabitEthernet0/0/2] quit [*DeviceC] interface gigabitethernet 0/0/3 [*DeviceC-GigabitEthernet0/0/3] isis enable 1 [*DeviceC-GigabitEthernet0/0/3] isis circuit-type p2p [*DeviceC-GigabitEthernet0/0/3] commit [~DeviceC-GigabitEthernet0/0/3] quit

#配置DeviceD

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[~DeviceD] isis 1 [*DeviceD-isis-1] is-level level-2 [*DeviceD-isis-1] network-entity 20.0000.0000.0004.00 [*DeviceD-isis-1] quit [*DeviceD] interface gigabitethernet 0/0/2 [*DeviceD-GigabitEthernet0/0/2] isis enable 1 [*DeviceD-GigabitEthernet0/0/2] isis circuit-type p2p [*DeviceD-GigabitEthernet0/0/2] quit [*DeviceD] interface gigabitethernet 0/0/1 [*DeviceD-GigabitEthernet0/0/1] isis enable 1 [*DeviceD-GigabitEthernet0/0/1] isis circuit-type p2p [*DeviceD-GigabitEthernet0/0/1] commit [~DeviceD-GigabitEthernet0/0/1] quit

3、配置DeviceA和DeviceC验证Hello报文的认证模式和密码。

# 配置DeviceA

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[~DeviceA] interface gigabitethernet 0/0/1 [~DeviceA-GigabitEthernet0/0/1] isis authentication-mode simple Helloisis [*DeviceA-GigabitEthernet0/0/1] commit [~DeviceA-GigabitEthernet0/0/1] quit

# 配置DeviceC

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[~DeviceC] interface gigabitethernet 0/0/1 [~DeviceC-GigabitEthernet0/0/1] isis authentication-mode simple Helloisis [*DeviceC-GigabitEthernet0/0/1] commit [~DeviceC-GigabitEthernet0/0/1] quit

4、验证配置结果

# 显示各路由器的IS-IS LSDB信息。

DeviceA

DeviceB

 DeviceC

DeviceD

 # 显示各路由器的IS-IS路由信息。Level-1设备的路由表中应该有一条缺省路由，且下一跳为Level-1-2设备，Level-2设备应该有所有Level-1和Level-2的路由。

 DeviceA

DeviceB

DeviceC

 DeviceD