Was wondering if anyone could help me on a VLSM question I have.
Suppose I have a network of 5 routers.
Router1: f0/1: 172.16.70.17/28 s01: 172.16.80.2/24
Router2: s0/1: 172.16.80.1/24 s0/0: 172.16.20.1/24
Router3: s0/1: 172.16.20.2/24 s0/0: 172.16.40.1/24
Router4: s0/1: 172.16.50.1/24 s0/0: 172.16.60.1/24
Router5: s0/1: 172.16.60.2/24 f0/0: 172.16.70.1/28
Each router is running RIPv1 and advertising its local network using classful addresses, e.g. Router1 config would be
router rip network 172.16.0.0
The ethernet interface on R5 (172.16.70.1/28) to the ethernet interface on R1 (172.16.70.17/28). The classful address within the network is the same, so it's not a discontigious one, but there are different subnet masks in use (/24 and /28). I've tried this on a router simulator and it works, but I'd just like to be sure.
I understand that RIP and IGRP don't work with VLSM's, but is this only if there are two different classful addresses?
Many thanks in advance