What goes in the Router ? We use a Cisco 3640. Do I just have to do
something like
router ospf 100
network 208.232.59.0 0.0.0.192 area 0.0.0.0
!
The router and the switch and all the PM3's will be in the 208.232.59.0
255.255.255.192 subnet.
Actually couldn't you put all 5 in one class C ? Just like you said but
you can use the .255 address with OSPF so that gives you just enough for 5
PM3's in one class C. Then the first part Unused subnet: route = x.x.x.0/29
14 hosts = .1 - .14 broadcast = .15
Fred Rappuhn
-----Original Message-----
From: Jon Rust <jpr@vcnet.com>
To: portmaster-users@livingston.com <portmaster-users@livingston.com>
Date: Monday, February 01, 1999 2:34 PM
Subject: Re: (PM) 6 PM3 - Help subnetting
>>We have 5 PM3 on a single Class C right now. But we need to add number 6.
>>Went to do it and realized that we were out of IP's. The router and the
>>switch, and all the PM3's are right now on the same class c.
>>
>>We just got a block of 4 consecutive class c's and was wondering the best
>>way to set this up. We thought about taking a subnet from a totally
>>different class C and using that for all the PM3 ethernet addresses and
for
>>the switch and the router. Then taking a different subnet (the 4
>>consecutive class c's) and using them for dial-in customers only.
>
>Each PM get's an address from the same subnet. (Use a switch!)
>
>On each PM set the pool size to 48. (I'm assuming T1 here, not E1.)
>
>Then set the assigned pool in 48 address chunks starting at a.b.c.16. PM3-1
>gets a.b.c.16 - a.b.c.63. PM3-2 gets a.b.c.64 - a.b.c.111. This will work
>through PM3-4, then you'll nee to start with a new /24.
>
>>Right now we are using BGP4 for our external routing and thought about
using
>>OSPF for our internal routing of the dial-in customers.
>>
>>Is OSPF the way to go ? If so, how exactly would you go about setting it
up
>>? I have OSPF enabled on all of the PM3 now just in case. I think I just
>>need to setup the areas.
>
>Yes! Run OSPF. It's a piece of cake to set-up on PM3's.
>
>>Is there a better way to go ? I want to try and use all IP's and not
waste
>>too many of them. Plus, what about a dial-in customer that wants a
>>dedicated IP address ?
>
>OSPF handles this just fine. You'll never need to think about it. You can
>use the leftover space from the assignment /24's above (1-15, and 208-254).
>
>Jon
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