One More Time on Portmaster Subnetting

Russ Hewitt (rdhewitt@connext.net)
Fri, 25 Oct 1996 10:29:23 -0700

Hi,

I have followed the thread that John Temples started with his question on
“Routing different subnets thru PM2E” and prior to that I myself had posted
several questions along the same lines. I believe now that I understand what
one must do to route a subnet through a Livingston Portmaster 2E but I would
like to have the group and Livingston look at my setup as a sanity check.

I have 4 class C address spaces:

xxx.yyy.196.0
xxx.yyy.197.0
xxx.yyy.198.0
xxx.yyy.199.0

My local Ethernet LAN is xxx.yyy.196.0 with the following:

Cisco 2501; xxx.yyy.196.1
Portmaster #1; xxx.yyy.196.3
Portmaster #2; xxx.yyy.196.4

My remote router address that I want to subnet to is xxx.yyy.198.17

Now what I want to do is route a /28 subnet of xxx.yyy.198.0 address space
through Portmaster #2. This is how I did that:

1) In the Cisco I set “ip route xxx.yyy.198.16 255.255.255.240 xxx.yyy.196.4”

Now the Cisco “show ip route” command results in the following: