IS-IS协议的基础配置

Clevebitr Lv2

IS-IS协议基本功能配置实例

与OSPF协议非常的相似,IS-IS协议也是基于链路状态并使用最短路径优先算法进行路由的一种 IGP 协议。

IS-IS(Intermediate System-to-Intermediate System,中间系统到中间系统)路由协议最初是ISO(the International Organization for Standardization,国际标准化组织)为CLNP(Connection Less Network Protocol,无连接网络协议)设计的一种动态路由协议。
现在CLNP网络已经基本不再使用,但是IS-IS协议由于其优秀性,被保留了下来。

实验目的

路由器之间通过IS-IS协议互联。

实验设备

华为AR2220(三台)

实验拓扑

实验拓扑

基础配置

  1. 改名,改密码,关闭信息中心。

AR1:

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<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R1
[R1]un in en
Info: Information center is disabled.
[R1]

AR2:

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<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R2
[R2]un in en
Info: Information center is disabled.
[R2]

以下都一样,就不概述了。

  1. 配置IP地址
    AR1:
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    [R1]int g0/0/0
    [R1-GigabitEthernet0/0/0]ip add 192.168.1.1 24
    AR2:
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    [R2]int g0/0/0
    [R2-GigabitEthernet0/0/0]ip add 192.168.2.1 24
    AR3:
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    [R3]int g0/0/0
    [R3-GigabitEthernet0/0/0]ip add 192.168.1.2 24
    [R3-GigabitEthernet0/0/0]q
    [R3]int g0/0/1
    [R3-GigabitEthernet0/0/1]ip add 192.168.2.2 24
    [R3-GigabitEthernet0/0/1]q
    [R3]int g0/0/2
    [R3-GigabitEthernet0/0/2]ip add 192.168.3.2 24
    [R3-GigabitEthernet0/0/2]q
    [R3]
    AR4:
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    [R4]int g0/0/2
    [R4-GigabitEthernet0/0/2]ip add 192.168.3.1 24

配置IS-IS协议

AR1:

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[R1]isis 1
[R1-isis-1]is-level level-1
[R1-isis-1]network-entity 10.0000.0000.0001.00
[R1-isis-1]quit
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]isis enable
[R1-GigabitEthernet0/0/0]quit
[R1]

AR2:

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[R2]isis 1
[R2-isis-1]is-level level-1
[R2-isis-1]network-entity 10.0000.0000.0002.00
[R2-isis-1]quit
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]isis enable
[R2-GigabitEthernet0/0/0]quit

AR3:

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[R3]isis 1
[R3-isis-1]is-level level-1-2
[R3-isis-1]network-entity 10.0000.0000.0003.00
[R3-isis-1]quit
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]isis enable
[R3-GigabitEthernet0/0/0]quit
[R3]int g0/0/1
[R3-GigabitEthernet0/0/1]isis enable
[R3-GigabitEthernet0/0/1]quit
[R3]int g0/0/2
[R3-GigabitEthernet0/0/2]isis enable
[R3-GigabitEthernet0/0/2]quit
[R3]

AR4:

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[R4]isis 1
[R4-isis-1]is-level level-2
[R4-isis-1]network 20.0000.0000.0004.00
[R4-isis-1]quit
[R4]int g0/0/2
[R4-GigabitEthernet0/0/2]isis enable
[R4-GigabitEthernet0/0/2]quit
[R4]

测试

查看AR3的配置结果

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[R3]dis isis lsdb

Database information for ISIS(1)
--------------------------------

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL
-------------------------------------------------------------------------------
0000.0000.0001.00-00 0x00000003 0x93f1 965 68 0/0/0
0000.0000.0001.01-00 0x00000001 0xd1ba 964 55 0/0/0
0000.0000.0002.00-00 0x00000003 0xe0a0 980 68 0/0/0
0000.0000.0002.01-00 0x00000001 0xdaaf 978 55 0/0/0
0000.0000.0003.00-00* 0x00000007 0xa34c 1136 111 1/0/0

Total LSP(s): 5
*(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
ATT-Attached, P-Partition, OL-Overload


Level-2 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL
-------------------------------------------------------------------------------
0000.0000.0003.00-00* 0x00000007 0x444a 1136 100 0/0/0
0000.0000.0004.00-00 0x00000003 0xbdab 1135 68 0/0/0
0000.0000.0004.01-00 0x00000001 0xee95 1135 55 0/0/0

Total LSP(s): 3
*(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
ATT-Attached, P-Partition, OL-Overload

[R3]

AR2:

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<R2>dis isis lsdb

Database information for ISIS(1)
--------------------------------

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL
-------------------------------------------------------------------------------
0000.0000.0001.00-00 0x00000003 0x93f1 824 68 0/0/0
0000.0000.0001.01-00 0x00000001 0xd1ba 823 55 0/0/0
0000.0000.0002.00-00* 0x00000003 0xe0a0 841 68 0/0/0
0000.0000.0002.01-00* 0x00000001 0xdaaf 840 55 0/0/0
0000.0000.0003.00-00 0x00000007 0xa34c 995 111 1/0/0

Total LSP(s): 5
*(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
ATT-Attached, P-Partition, OL-Overload

可以看到,配置结果一样。
AR1的路由表中应该有一条默认路由,指向L1/2路由。
查看路由信息:

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<R1>dis isis rou

Route information for ISIS(1)
-----------------------------

ISIS(1) Level-1 Forwarding Table
--------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags
-------------------------------------------------------------------------------
0.0.0.0/0 10 NULL GE0/0/0 192.168.1.2 A/-/-/-
192.168.2.0/24 20 NULL GE0/0/0 192.168.1.2 A/-/-/-
192.168.1.0/24 10 NULL GE0/0/0 Direct D/-/L/-
192.168.3.0/24 20 NULL GE0/0/0 192.168.1.2 A/-/-/-
Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
U-Up/Down Bit Set

至此,全网连通。

  • 标题: IS-IS协议的基础配置
  • 作者: Clevebitr
  • 创建于 : 2024-09-30 18:28:29
  • 更新于 : 2024-11-14 22:40:31
  • 链接: https://diaofanzhuye.shop/2024/09/30/IS-IS协议的基础配置/
  • 版权声明: 本文章采用 CC BY-NC-SA 4.0 进行许可。