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I'm trying to setup a network with 3 subnets like this (mask is /26):

First 192.168.20.0-64
Second 192.168.20.65-128
Third 192.168.20.129-255

First, I'm just trying to connect the first 2 with fiber optics (checking how it works) instead of serial. The routers are connecting using the IPs 192.168.1.1 and 192.168.1.2.

The issue is that after I setup RIP routing to 192.168.20.0 and 192.168.1.0 there won't be connection from 1 side to the other. Ping between the routers is fine.

Am I doing something wrong here?

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  • are you using ripv1 or ripv2? – Datagram.Network Sep 24 '18 at 19:22
  • Damn that instantly worked... thanks. Why is that? – Cliff Sep 24 '18 at 19:29
  • Please see answer below, and if it's right please upvote/correct answer. – Datagram.Network Sep 24 '18 at 19:49
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I assume you are using RIPv1, RIPv1 uses classful routing so you won't be be able to use variable-length subnet mask (VLSM). Try RIPv2, which uses Classless Inter-Domain Routing.

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