Re: Carving up a Class C
MIX System Operator (sysop@mixcom.com)
Thu, 27 Jun 1996 12:26:37 -0500
At 02:50 PM 6/26/96 -0400, Kurt Schafer wrote:
>
>This is a sub-netting question. If anybody can point me to some nice
>FAQ's or web based reference material I would be appreciated.
>
>I've set up my Portmaster's (4 currently) in preparation for an 8 network
>subnet. (subnet mask 224) Each PM-2E has been given an IP in the lower
>net (.26 .27 .28 .29) and the assigned addresses for each fall within
>the node ranges for each subnet. (currently all machines have a subnet mask
>of 255.255.255.224)
>
>Now, all the reference material I've managed to glean so far points me to
>think I need to set up a static route for each network (0,32,64,96 etc)
>in my Cisco 2501.
>
>Tips on doing that would be appreciated but what I'm wonderring is this.
>
>Can I set up all the static routes for each subnet to point to the same
>Portmaster and then let RIP sort it out in the wash by using the
>'add subnet' command on each portmaster ? Does that make the static route
>assignment on the Cisco any easier ? (ie a global command of some kind)
On the PM end:
add netmask xxx.yyy.zzz.0 255.255.255.224
It will then know that the IPs that it is using are from a .224 subnet.
Add static routes for the subnets in the Cisco:
conf t
ip route xxx.yyy.zzz.0 (32,64 etc) 255.255.255.224 lll.iii.vvv.pm1
This is the best way for networks that have more than 2 PM's, or you can
static route every IP, which gets messy when scaled.
If you have a C block that you use internally for the ether ports, I would
suggest that you assign an IP from that network to the PM's. Then you don't
waste up to 23 IPs (8 subnets, only 7 PM's).
------------
Jeff Mountin
sysop@mixcom.com
MIX Communications
Serving the Internet since 1990
Sure my business card says "Senior Network Administrator"
They still make me do just about anything.