Since I am going through this pain anyway, I am trying to move onto better
footing for continued future growth. Originally, I setup this ISP basically
all in one Class C address space without subnetting. This works well, but
be a roadblock after growing past four or five PM's. One of the PM's is our
router to the internet.
After looking up recommendations from the archives, I am adding a Cisco
2514 as my router to the internet and subnetting a second Class C into 32 IP
blocks to be used as dialup pools for each PM. Each PM's ethernet port gets
an IP address out of the first Class C, on the same ethernet as the Cisco.
T1 to |----------| x.x.x.1 x.x.x.2
------------| Cisco
|-------------------|----------------------|------------------------------------
Internet |----------| | |
| |
|-------------|
|-------------|
| PM1 | | PM2 |
|-------------|
|-------------|
y.y.y.1-30 y.y.y.33-62
I have two questions. First, I have added a static netmask for the y.y.y.0
network of 255.255.255.224 into each PM, but when RIP broadcasts this to the
Cisco, the netmask has changed to 255.255.255.255 and the Cisco seems
confused about which interface the PM is attached to. Here is what shows up
the the Cisco routing table:
R y.y.y.32 255.255.255.255
[120/1] via x.x.x.2, 00:00:09, Ethernet1
[120/1] via x.x.x.2, 00:00:09, Serial0.1
This does not properly route packets, so I had to add static routes to the
Cisco to route each subnet to the appropriate PM. (ex. ip route y.y.y.32
255.255.255.224 x.x.x.2). Which works, but I believe it should not be
necessary.
What do I need to setup to allow the Cisco to properly pick up the subnet
routes?
My second question is about routing for static IPs, routing subnets to
dynamic IPs, and routing subnets to static IPs. I have several customers
with small offices who dial into one of my PMs and are either dynamically or
statically assinged an IP address and have some subnet routed to them
(z.z.z.0) (setup through Radius). This works fine when all of my PMs and
both the dynamic and static IPs are in the same network, but do I need to do
anything beyond getting RIP working properly to handle this with the new
configuration?
Thanks for any suggestions.
- Randy Moore
Atlantech Online, Inc.
(301) 470-2977
http://www.atlantech.net/