converting flat 255.255.252.0 network to 255.255.255.0 subnets

[nadams_pruitt]

I am trying to convert a flat network (10.100.20.0 - 255.255.252.0) to a more hierarchical design. The above subnet mask yields a range of 10.100.20.1 - 10.100.23.254. I have a 3550 SMI with port fa0/1 connected to my current network. I have set up a vlan and added ports 5-6 to it. The ip address of vlan 2 is 10.100.244.1 - 255.255.255.0. I have a workstation on port 5 with an ip address of 10.100.244.2 - 255.255.255.0 and a gateway of 10.100.244.1. My problem is that from the workstation I can ping anything in 10.100.20 but nothing in 10.100.21, 10.100.22, or 10.100.23. What am I missing?

[rsissons]

Try specifying 'ip classless' in your router config. Also, since you are effectively using VLSM, Variable Length Subnet Masking, you need to run a classless routing protocal, OSPF, EIGRP or RIP V2.

[nadams_pruitt]

I am configured for classless routing and I have tried setting up a classless protocol but my 3550 is an SMI switch so I do not have eigrp only rip and igrp. I configured ripv2 which should work but still no success.

[milan.kulik]

Are the other subnets (10.100.21, 10.100.22, etc.) directly connected to the same router?

If yes, do the target PC have their default gateway configured correctly?

Example: a PC in 10.100.21.0 should have 10.100.21.1 configured as a default gateway and the same address with 255.255.255.0 mask should be configured on your router interface (SVI).

If not, do you see routes to these subnets in sh ip route output on your router?

Regards,

Milan

[nadams_pruitt]

These addresses are no subnets. Rather, they are valid addresses in the 10.100.20.0 - 255.255.252.0 network. This subnet mask yields a range of 10.100.20.1 - 10.100.23.254.

[milan.kulik]

Sorry for misunderstanding.

How does sh ip route on your router look like?

Regards,

Milan

[nadams_pruitt]

Problem is resolved. My configuration was good. The problem was a policy route on a remote router that was redirecting replys.