RIPV1 solving discontinuous subnet problems

Two methods of solving RIPv1 discontinuous subnets

1. Use RIPv2 to manually turn off automatic summarization.

2. The address interface configures the backup address.

   
   

   The second method is mainly

here is the topology diagram

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Precautions:

When configuring the backup address, add the "secondary" keyword, which will cause the primary address to change if not added.

Basic configuration:

Barney:

Conf t

Ho Barney

Interface Loopback0
IP address 10.33.55.1 255.255.240.0

Interface ethernet0/0

No shut

IP address 192.168.83.24 255.255.255.0

Router RIP
Network 10.0.0.0
Network 192.168.83.0

Andy:

Conf t

Ho Andy

Interface ethernet0/0
No shut
IP address 192.168.83.1 255.255.240.0

Interface ETHERNET0/2

No shut

IP address 192.168.12.65 255.255.255.224

Interface ETHERNET0/1
No shut
IP address 192.168.12.195 255.255.255.224

Router RIP
Network 192.168.12.0
Network 192.168.83.0

Ernest:

Conf t

Ho Ernest

Interface ethernet0/0

No shut

IP address 192.168.12.196 255.255.255.224

Interface Loopback0
IP address 10.33.35.1 255.255.240.0

Router RIP
Network 10.0.0.0
Network 192.168.12.0

Ping 10.33.35.1 and 10.33.55.1 on Andy after configuration is not able to ping through

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Workaround:

Barney:

Interface ethernet0/0
IP address 10.33.5.1 255.255.240.0 secondary

Andy:

Interface ethernet0/0
IP address 10.33.5.2 255.255.240.0 secondary

Interface ETHERNET0/1
IP address 10.33.75.1 255.255.240.0 secondary

Router RIP
Network 10.0.0.0

Ernest:

Interface ethernet0/0
IP address 10.33.75.2 255.255.240.0 secondary

Go to Andy. Show ip route when 10.33.32.0/20 and 10.33.48.0/20 segments appear in the routing table

is to go to 10.33.35.1/20 and 10.33.55.1/20 's network segment.

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RIPV1 solving discontinuous subnet problems