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如何在具有两个 IP 的 Cisco 路由器接口上配置 isis

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如何在具有两个 IP 的 Cisco 路由器接口上配置 isis

Cisco 路由器连接到交换机。交换机上没有办法配置中继接口。每个路由器的接口上配置了 2 个 ips - 主 ip 和辅 ip。根据 ISIS，路由器只从左右邻居接收路由。例如，从 R5 到 R1 的环回接口 ping 不起作用。R1 的 LSA 数据库存在于 R5 上。是否可以设置它以便每个人都可以看到每个人？谢谢！

拓扑

R1#sh ip route isis
  
      12.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
i L2     12.0.10.4/32 [115/20] via 12.10.5.4, 00:26:44, FastEthernet0/0
i L2     12.10.6.0/24 [115/20] via 12.10.5.4, 00:26:44, FastEthernet0/0


R2#sh ip rou isi

      12.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
i L2     12.0.10.5/32 [115/20] via 12.10.7.5, 00:18:51, FastEthernet0/0
i L2     12.10.8.0/24 [115/20] via 12.10.7.5, 00:18:51, FastEthernet0/0


R3#sh ip rou isi

      12.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
i L2     12.0.10.5/32 [115/20] via 12.10.8.5, 00:19:44, FastEthernet0/0
i L2     12.10.7.0/24 [115/20] via 12.10.8.5, 00:19:44, FastEthernet0/0


R4#sh ip ro isis

      12.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
i L2     12.0.10.1/32 [115/20] via 12.10.5.1, 00:29:50, FastEthernet0/0
i L2     12.10.4.0/24 [115/20] via 12.10.5.1, 00:29:57, FastEthernet0/0

R5#sh ip rou isis
      12.0.0.0/8 is variably subnetted, 9 subnets, 2 masks
i L2     12.0.10.2/32 [115/20] via 12.10.7.2, 00:18:29, FastEthernet0/0
i L2     12.0.10.3/32 [115/20] via 12.10.8.3, 00:18:29, FastEthernet0/0
i L2     12.10.4.0/24 [115/20] via 12.10.8.3, 00:18:29, FastEthernet0/0
i L2     12.10.6.0/24 [115/20] via 12.10.7.2, 00:18:29, FastEthernet0/0


    R5#sh isis data

IS-IS Level-2 Link State Database:
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
R1.00-00              0x00000007   0xDC3C        962               0/0/0
R2.00-00              0x00000006   0x22EE        739               0/0/0
R3.00-00              0x00000006   0x3CD1        739               0/0/0
R3.01-00              0x00000001   0xE116        0 (741)           0/0/0
R4.00-00              0x00000005   0x24E8        873               0/0/0
R4.01-00              0x00000004   0xD9DB        837               0/0/0
R5.00-00            * 0x00000006   0x659D        741               0/0/0
R5.01-00            * 0x00000004   0x0EA3        745               0/0/0
R5#sh isis data R1.00-00 detail


IS-IS Level-2 LSP R1.00-00
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
R1.00-00              0x00000007   0xDC3C        954               0/0/0
  Area Address: 49.0001
  NLPID:        0xCC
  Hostname: R1
  IP Address:   12.0.10.1
  Metric: 10         IS-Extended R4.01
  Metric: 10         IP 12.0.10.1/32
  Metric: 10         IP 12.10.4.0/24
  Metric: 10         IP 12.10.5.0/24
R5#

PS：具有中继和子接口的相同拓扑正常工作。问题似乎出在路由器接口上的几个地址上。但思科手册说明了应该如何工作。请帮助我理解。

在此处输入图片描述

R5#sh ip route isis

      12.0.0.0/8 is variably subnetted, 12 subnets, 2 masks
i L2     12.0.10.1/32 [115/30] via 12.10.8.3, 00:08:51, FastEthernet0/0.80
i L2     12.0.10.2/32 [115/20] via 12.10.7.2, 00:09:10, FastEthernet0/0.70
i L2     12.0.10.3/32 [115/20] via 12.10.8.3, 00:08:51, FastEthernet0/0.80
i L2     12.0.10.4/32 [115/30] via 12.10.7.2, 00:09:04, FastEthernet0/0.70
i L2     12.10.4.0/24 [115/20] via 12.10.8.3, 00:08:51, FastEthernet0/0.80
i L2     12.10.5.0/24 [115/30] via 12.10.8.3, 00:08:51, FastEthernet0/0.80
                      [115/30] via 12.10.7.2, 00:08:51, FastEthernet0/0.70
i L2     12.10.6.0/24 [115/20] via 12.10.7.2, 00:09:10, FastEthernet0/0.70

R5#ping 12.0.10.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.0.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/65/80 ms

答案1

我正确配置了区域和级别，以便不会形成路由循环并且一切正常。

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