Well, in my particular case, I have three static IPs in a
class C block, but my subnet is 255.255.255.128 so it's
not within the entire class C block. However, my IPs aren't
sequential and are as much as 50 apart (sequentially speaking)
- which leads me to assume that someone else has IPs assigned
to them that are in between two of mine. Does that complicate
anything? Can I still arbitrarily choose one of my three as
a gateway for the other two without having to tell my ISP anything?
Curt
On Thu, May 25, 2000 at 03:00:43PM -0700, Seth Cohn wrote:
> At 11:38 AM 05/25/2000 -0700, you wrote:
> > > Ah. The three IPs are in a block. I sit corrected.
> >I dont believe so... There is no such thing as a block of 3 IP's AFAIK,
> >you can make a subnet of 8 ip's, inwhich you use 3 of them for your net
> >(network, gateway, and broadcast, addresses,
>
> Not quite:
>
> on 8, you lose just 2. that's 6.
>
> check out
>
> http://www.agt.net/public/sparkman/netcalc.htm
>
> that's /29 netting
>
> > So... probably he has 3 ip's in a block of 256, with a netmask of
> >255.255.255.0 (which means he has 3 ip's in someone elses network, which
> >is really quite different!)
>
>
> maybe not. He might have 3 in a a block of 6, or might have 3 in a
> block of 14, etc...
>
> 2 ips can be blocked as /30 btw, with 4 ips used total.
>
> I guess the real question to ask is, your existing netmask is WHAT?
> that would answer the question.
>
> Seth
>
