On 11 Sep 96 at 16:12, Mike Wood wrote:
> I have a PM2-10 with the 5 ISDN module inserted, and have a question
> about routing. I'm about install a Portmaster OR ISDN, at a customers site.
> They've requested 10 IP addresses (1 for the router 9 for the workstations)
> from us, and I don't see it being a problem. The only question I have, is
> do I HAVE to subnet... from what I understand about subnetting I'll loose a
> substantial amount of my measly class 'C'. Does anybody have the same sort
> of thing in place or a suggestion?
Using subnetting, you lose 2 IP adresses in each subnet (lowest value
for the subnet itself and highest value for broadcast packets in this
subnet).
Up to now, the PM only supports fixed length subnet masks (VLSMs are
in beta with OSPF). To give 10 IPs to the customer, you need a
subnetting of 4 bits (255.255.255.240). This will give you 16 subnets
of 16-2 = 14 addresses each.
An alternative is to give the customer 10 addresses as host routes
and add Framed-Routes to his account with 9 addresses pointing to the
10th address (the router). Enable broadcasting of RIP to his address,
so his router sets up correctly.
Frank
-- ***** The expressed opinions are totally mine! ***** Frank M. Heinzius MMS Communication GmbH frimp@mms.de Eiffestrasse 598 http://www.mms.de 20537 Hamburg, Germany Phone: +49 40 211105-0 Fax: +49 40 210 32 210 ***** U.S.Robotics and Livingston Distributor *****