-=PCTechTalk=- Re: DHCP Client problem
- From: Jim <n1jmm@xxxxxxxxxxxx>
- To: pctechtalk@xxxxxxxxxxxxx
- Date: Wed, 07 Aug 2002 23:25:28 -0400
Glad to hear it's working again, ya have to wonder what happened to that port
thou.
About DHCP, when your computer gets an address fromthe DHCP server, there is a
RENTAL / LEASE time assigned with it, my router assigns 24 hours, other servers
assign various amounts of time. Bottom line is once this time has expired the
computer must stop
using that address.
Normall this is not a problem because, once 1/2 the time has been used, the
computer should start re-negotiating with the DHCP server to re-new the lease
of that address, if this fails it will try again at 1/2 the remaining time, as
the lease expiration
draws near it tries more often. The DHCP server can either renew, ignore, or
cancel the lease anytime the computer asks for a renewal. If the lease is
cancelled or expires your computer must negotiate for a new IP address lease.
All of this should happen
transparently behind the scenes, and it should happen very quickly, fraction of
a second as long as the DHCP server is readily available. On large networks
with lots of traffic there could be problems on small home/office networks <20
machines there should
be no problem.
-Jim-
wendy simmons wrote:
>
> Jim,
>
> First of all, thank you very much for your help.
>
> Switching the network cables on the internet sharing box proved that there is
> something wrong on the first port. Now the computers are contected to port
> #'s 2 & 3 and all is well again. All the connections were snug (that was one
> of the first things I checked when the problem started) and there were no
> hardware/software changes. I still don't understand what would have caused
> the IP address to expire on a Sunday afternoon. Any way, things are working
> now and I'll look into it more next week when I get back from a business trip.
>
> I do have one other question though. Is there anything detrimental to leaving
> the first port empty and using the remaining ports on the internet sharing
> box?
>
> Thanks again and take care,
>
> Wendy
>
> Jim wrote:
>
> ...Assuming the cable is plugged into the 'bad' computers NIC correctly, then
> either the computer/nic, cable, or internet sharing box have a problem. Since
> your not very experienced with this will start with the simple stuff. I
> assume the internet sharing box has several ethernet connectors on it, 1st
> thing to try is shutdown both machines, then at the internet sharing box
> unplug both cables from the computers, swap them around and plug them back
> in. (The idea here is to make sure both ports of the sharing box are working)
> strat the computers up and see if the 'good' one still works, also see if the
> 'bad' one now works. If both now work then problem was a poor connection. ...
>
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