实验7 ISIS多区域配置-优快云博客

本文详细介绍了ISIS路由协议在多区域配置中的应用，包括网络实体、路由器类型、接口使能和链路邻接关系的配置。通过实例展示了路由聚合和验证的过程，包括Level-1到Level-2的路由聚合、路由渗透、区域验证和接口验证。实验揭示了不同开销类型、链路类型和验证设置对路由学习的影响。

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实验任务一：ISIS路由聚合和验证配置

建立物理连接
配置IS多区域
[RTA-isis-1]network-entity 10.0000.0000.0001.00//配置网络实体
[RTA-isis-1]is-level level-1//配置路由器类型
[RTA-GigabitEthernet0/0]isis enable//使能接口
[RTA-GigabitEthernet0/1]isis enable
[RTA-GigabitEthernet0/1]isis circuit-level level-1//配置接口的链路邻接关系类型。

[RTB-isis-1]network-entity 10.0000.0000.0002.00
[RTB-isis-1]is-level level-1
[RTB-GigabitEthernet0/2]isis enable
[RTB-GigabitEthernet0/2]isis circuit-level level-1

[RTC-isis-1]network-entity 10.0000.0000.0003.00
[RTC-isis-1]is-level level-1-2//默认也是level-1-2
[RTC-GigabitEthernet0/0]isis enable
[RTC-GigabitEthernet0/0]isis circuit-level level-2
[RTC-GigabitEthernet0/2]isis enable
[RTC-GigabitEthernet0/2]isis circuit-level level-1
[RTC-GigabitEthernet0/1]isis enable
[RTC-GigabitEthernet0/1]isis circuit-level level-1

[RTD-isis-1]network-entity 20.0000.0000.0004.00
[RTD-isis-1]is-level level-2//默认也是level-1-2
[RTD-GigabitEthernet0/1]isis enable
[RTD-GigabitEthernet0/0]isis enable
[RTD-GigabitEthernet0/0]isis circuit-level level-2

isis路由表及LSDB查看
[RTA]display isis route

                 Route information for IS-IS(1)
                 ------------------------------

                 Level-1 IPv4 Forwarding Table
                 -----------------------------

IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags

0.0.0.0/0 10 NULL GE0/1 172.16.1.2 R/-/-
172.16.2.0/24 20 NULL GE0/1 172.16.1.2 R/-/-
172.16.1.0/24 10 NULL GE0/1 Direct D/L/-
172.16.0.0/24 10 NULL GE0/0 Direct D/L/-

  Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down bit set

[RTB]display isis route

                     Route information for IS-IS(1)
                     ------------------------------

                     Level-1 IPv4 Forwarding Table
                     -----------------------------

IPv4 Destination IntCost ExtCost ExitInterface NextHop Flags

0.0.0.0/0 10 NULL GE0/2 172.16.2.2 R/-/-
172.16.2.0/24 10 NULL GE0/2 Direct D/L/-
172.16.1.0/24 20 NULL GE0/2 172.16.2.2 R/-/-
172.16.0.0/24 30 NULL GE0/2 172.16.2.2 R/-/-

  Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down bit set

//level-1路由器有一条缺省路由指向level-2的路由器。

[RTC]display isis route

                     Route information for IS-IS(1)
                     ------------------------------

                     Level-1 IPv4 Forwarding Table
                     -----------------------------