Anybody know the default dhcp lease times on the DG384 and is there any
way to make the damm thing release an address?

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Regards
Tony
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In message <pan.2005.09.17.22.05.53.936982@tjhpropertygarbage .co.uk>,
Tony Hogarty <newsreply@tjhpropertygarbage.co.uk> writes
Hours.

In answer to he second question - reboot the router?

--
Peter R Cook

In an earlier contribution to this discussion,
Tony Hogarty <newsreply@tjhpropertygarbage.co.uk> wrote:

Can't you do it from the PC by typing "ipconfig /release [adapter]" at the
Command Prompt - where [adapter] is the name of your Ethernet card?
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Cheers,
Tim
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On Sat, 17 Sep 2005 23:42:25 +0100, Peter R Cook wrote:

Thanks

No tried that and it didn't seem to work.

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Regards
Tony
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"Peter R Cook" <PCook@wisty.plus.com> wrote in message
news:$VxYflCRvJLDFwZN@wisty.plus.com...
Interesting. On my DG834GT (the 108Mbps version) the lease time is three
days. I wonder why one version of the router would have a significantly
shorter lease time than another?

That is almost guaranteed to work, unless the router "remembers" its MAC-IP
table from one reboot to the next.


Why do you need to make the router release an address? Assuming the subnet
that you are using has more addresses to give out than you have devices
connected - which is normally the case on a home network - then you
shouldn't need to make the router release an address so it can be given to
another PC.

I know DHCP is supposed to be dynamic, but unless you switch on a PC very
rarely (ie if it's turned off for longer than the IP address's lease time),
it will almost invariably be given an IP address for life.

On Sun, 18 Sep 2005 15:00:03 +0100, Martin Underwood wrote:

I have more machines than IP addresses temporarily as I'm migrating
services between different servers.

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Tony
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On Sun, 18 Sep 2005 11:00:55 +0100, "Tiscali Tim" <tele@privacy.net>
scrawled:


That would release the PC from having the IP address but I'm not sure
that would neccesarily force the router to release the IP back to the
available pool.
--
Stuart @ SJW Electrical

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On Sun, 18 Sep 2005 16:12:51 +0100, Lurch wrote:

No, there are two reserved addresses and two which are available for
allocation via dhcp. It should in theory be a simple matter of
reallocating one of the addresses to the changed PC but it doesn't seem to
want to wor. It's not a big deal I'll just have to hook a keyboard and
monitor up to the server and see what is going on.

It doesn't seem to release it at the router which hangs on to the address
for all it's worth. Most routers seem to have an undocumented interface
via telnet that would allow you to issue commands but I'm not sure if this
particular router does.

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Regards
Tony
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In an earlier contribution to this discussion,
Tony Hogarty <newsreply@tjhpropertygarbage.co.uk> wrote:

addresses - and thus needed to release some addresses. I interpreted this to
mean that you were doing this in a large office with hundreds of computers.

You're now talking about *two* addresses! Why can't you change the range of
available addresses dished out by the DHCP server (plus the mask, if
necessary) to give you all the addresses you need without having to release
any?
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Tim
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On Sun, 18 Sep 2005 23:06:47 +0100, Tiscali Tim wrote:

Because these are real IP's not private IP addresses so they are not mine
to give out!

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Tony
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"Tiscali Tim" <tele@privacy.net> wrote in message
news:3p66nnF8q04bU1@individual.net...
Yes, I noticed that too. If you're using NAT, you've got loads of private
addresses - eg the whole of the 192.168.0.x subnet, so 253 (256 less .0 and
..255 multicast and .1 for the router).

Maybe you're not using NAT and are handing out public IP addresses - in
which case I see your problem.


I'm not sure what DHCP is supposed to do if it's handed out an address but
the PC that the address is leased to is offline when another PC requests an
address and the pool is exhausted. You'd think that it would give the
address to the new PC and force the original PC to request a new address
(which it may not get) when it is turned on. But this is not a situation
I've ever been in.


You could ask on the Netgear support forum and see if anyone knows whether
there's a parameter that can be tweaked to reduce the lease time. The
problem is going to be that unless that parameter is stored in non-volatile
memory, it's going to be reset back to the default (1 day?) if you ever
reboot the router.

On Mon, 19 Sep 2005 09:15:39 +0100, Martin Underwood wrote:

That's exactly my problem. No matter now as the problem has gone away as
the lease time has expired. Still it would be useful to know for the
future if this situation comes up again at some time. I'll investigate
further.

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Regards
Tony
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In an earlier contribution to this discussion,
Tony Hogarty <newsreply@tjhpropertygarbage.co.uk> wrote:

In that case, why not disable DHCP and just give the PCs fixed IP addresses?
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Tim
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On Mon, 19 Sep 2005 09:47:40 +0100, Tiscali Tim wrote:

That is what I have done - unfortunately the router won't release the old
dhcp leases so there are no IP addresses to allocate. Hence when I set up
the server to use an address that had previously been allocated via dhcp
to a now non existant client the router refuses to recognise the new
machine.

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Regards
Tony
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In an earlier contribution to this discussion,
Tony Hogarty <newsreply@tjhpropertygarbage.co.uk> wrote:

Even if you turn off DHCP in the router? I'm surprised!
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Cheers,
Tim
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On Mon, 19 Sep 2005 14:38:00 +0100, Tiscali Tim wrote:

Yep, I think it is probably an 'undocumented feature' in this firmware.

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Regards
Tony
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On Mon, 19 Sep 2005 15:04:39 +0100, Tony Hogarty
<newsreply@tjhpropertygarbage.co.uk> scrawled:

Ah, now I'm with it!

Default the router, that should do it.
--
Stuart @ SJW Electrical

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