Re: [NTISP] IP delegation...

X-BOX/B.P. ( (no email) )
Tue, 7 Dec 1999 16:28:00 +0100

After all reading I think the only solution is subnetting all Your users or
using DHCP or not beeing able to control IP-usage of a particular user at
all. First important question is if You are routing Your users or bridging
Your users? If You are routing them You MUST assign subnets (and this is
what I'd prefer..). If You want to avoid the additional work, simply use
assigned pools and OSPF and write a small script for a website where a user
could purchase a bigger netmask to be assigned more ip's (standard give him
a mask of, You know...). Thus, if he wants more IP's he goes
to Your site and purchases an amount of say 16 IP's. The script changes the
radius,Tacacs or whatever database and assignes the user the new netmask.
That's all...its quite easy to do..


Bernd Pollinger
X-BOX Online Service GmbH
Berlin, germany
"Keyboard Error: Press F1 to continue!" ;-)

----- Original Message -----
From: Gabriel Sponsler <>
To: <>
Sent: Friday, December 03, 1999 8:39 PM
Subject: Re: [NTISP] IP delegation...

| Bob:
| I am sorry I got your feathers ruffled. Perhaps the inquiry was a bit
| incomplete.
| The reason that we have the constraint is because of the unusual
| circumstance with our upstream provider. They control the class B, and
| allocated us only two class C blocks as of now, so as you surely know
| subnet is appropriate for our circumstance.
| I was hoping for a resolution aside from subnetting our customers to
| meet their individual IP needs for a couple of reasons. 1) As you can tell
| from the above paragraph we are temporarily constrained by the quantity of
| IPs we can use. 2) Our sales team have sold odd amounts of IP to our
| customers, and once again I am trying to be efficient by not assigning a
| to someone who only needs 6 IP addresses.
| I am somewhat resigned to subnet to each customer accordingly, but
| again that's why I posted to the news group for alternative suggestions.
| Thanks,
| Gabe
| ----- Original Message -----
| From: Bob's Lists <>
| To: <>
| Sent: Friday, December 03, 1999 11:19 AM
| Subject: RE: [NTISP] IP delegation...
| > Pardon my ignorance on this issue, but in starting to sell DSL our
| > has run into a problem delegating IP addresses to customers. Due to the
| > configuration constraints of the Cisco router (3810) we are using, we
| > assigned a subnet mask for our end users of thus allowing
| all
| > of the users access to all of the addresses in the assigned class C.
| >
| > My question is: What would be the best way to avoid customers to just
| > unused IPs for their workstations? The only way I could do it now is
| > assign all the untaken IP to a Nt workstation, but that is cumbersome
| > quite annoying.
| >
| > -----------------------
| >
| > The only suggestion I can offer, is to get a network admin who knows
| > they're doing.
| >
| > First of all, is not a class C, it is 2 class C's (or 1
| > and they're now known). Using that mask, and if, indeed, your upstream
| > allocated you a class C, I'm surprised they haven't nailed you yet for
| some
| > 'unusual traffic' on your link...
| >
| > Next, you should be allocating customers only what they need. If they
| 1
| > address, give them a /30 (with the gateway on your router, leaving 1 IP
| > the customer end. Similarly for customers requiring more addresses,
| > them appropriately sized subnets.
| >
| > What configuration restraints?
| >
| > Whoever set it up being incapable is the only restraint I see here.
| >
| > Regards
| >
| > Bob
| >
| >
| > For more information about this list (including removal) go to:
| >
| For more information about this list (including removal) go to:

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