Problem with D-Link DSL-G624T

Hi!

I bought packet of DSL-924, which includes USB-WLAN dongle and
ADSL-WLAN router.
The router box is DSL-G624T. There is a problem with LAN ports. The LAN
switch disconnects LAN computers exactly after one hour connection. I
have checked this around ten times. Behaviour is repeated every time.

Is this typical bug in D-Link LAN switches or is there a configurable
time-out timer in switch?

Firmware Version : V3.00B01T02.EU-A.20060208

Thanks,

Antti

(E-Mail Removed) hath wroth:

>I bought packet of DSL-924, which includes USB-WLAN dongle and
>ADSL-WLAN router.
>The router box is DSL-G624T. There is a problem with LAN ports. The LAN
>switch disconnects LAN computers exactly after one hour connection. I
>have checked this around ten times. Behaviour is repeated every time.

Questions:
1. Disconnects from what? From the router (can you ping the router)?
From the internet (can you surf the internet)? From other computers
on the network (try pinging them)?
2. Are the various unspecified LAN computers connected via wireless
or via ethernet?
3. Are they active during the 1 hour before it times out? It might
be some kind of power save feature on the computers.

>Is this typical bug in D-Link LAN switches or is there a configurable
>time-out timer in switch?
>
>Firmware Version : V3.00B01T02.EU-A.20060208

Not typical or normal. I can't tell if there's a setting because the
online emulator does not include the DSL-G624T:
http://support.dlink.com/emulators/

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann kirjoitti:

> Questions:
> 1. Disconnects from what? From the router (can you ping the router)?
> From the internet (can you surf the internet)? From other computers
> on the network (try pinging them)?

I have laptop XP and desktop with Debian. I open ssh from XP to Linux.
ssh breaks down with message something like this 'peer-to-peer
connection time-out by remote host...'

Both are connected 10/100 ports. WLAN is disabled.

I use G624T as my LAN switch. This doesn't occur with another switch.
LAN settings are same.

WAN side works fine.

> 2. Are the various unspecified LAN computers connected via wireless
> or via ethernet?
> 3. Are they active during the 1 hour before it times out? It might
> be some kind of power save feature on the computers.
Sure both are active. I can just open new ssh to Linux.

Regards,

Antti

(E-Mail Removed) hath wroth:

>Jeff Liebermann kirjoitti:
>
>> Questions:
>> 1. Disconnects from what? From the router (can you ping the router)?
>> From the internet (can you surf the internet)? From other computers
>> on the network (try pinging them)?

>I have laptop XP and desktop with Debian. I open ssh from XP to Linux.
>ssh breaks down with message something like this 'peer-to-peer
>connection time-out by remote host...'

Please check the the Linux SSH2 server is actually running.

>Both are connected 10/100 ports. WLAN is disabled.
>
>I use G624T as my LAN switch. This doesn't occur with another switch.
>LAN settings are same.
>
>WAN side works fine.

So, each machine can go through the ethernet switch, through the
router, and to the internet, but can't talk to each other.

If you're juggling ethernet switches and ports around, it's possible
that the ARP table in the switch, and/or on both machines is confused.
Change the switch and each machine could easily have the "old" MAC
address. Try arp -a and see if it makes sense. Also, try to ping
the other machine and anything else that's avaible such as the router.
Otherwise, just try arp -d IP_ADDRESS to delete the ARP table entry.
Also, power cycle the DWL-G624T.

>> 2. Are the various unspecified LAN computers connected via wireless
>> or via ethernet?

No answer. I'll assume that the Windoze XP box and Debian boxes are
the only computers on your network.

>> 3. Are they active during the 1 hour before it times out? It might
>> be some kind of power save feature on the computers.

No answer. What happened to the 1 hour timeout?

>Sure both are active. I can just open new ssh to Linux.

I thought the problem was that it did work, but that there was a 1
hour timeout.

Check the route table on both machines before and after the 1 hour
timeout.
On Windoze:
route print
On Linux:
netstat -rn
Compare results before and after. One possibility is that the
DSL-G624T has RIP or RIP2 active. If the router or some other device
on your LAN is advertising a weird route, it might send the default
route on the two machines off to weirdness. I have no idea why it
would take an hour for this to happen, but it's worth checking anyway.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann kirjoitti:

> Compare results before and after. One possibility is that the
> DSL-G624T has RIP or RIP2 active. If the router or some other device
> on your LAN is advertising a weird route, it might send the default
> route on the two machines off to weirdness. I have no idea why it
> would take an hour for this to happen, but it's worth checking anyway.

I went back to router settings. RIP is disabled.

I disabled DHCP server and set fixed IP for WIN and Linux clients.
Now connection doesn't disconnect after an hour.
DHCP lease time is set 3600 seconds.

But, I would need DHCP server when my friends will visit my LAN.

Antti

(E-Mail Removed) hath wroth:

>
>Jeff Liebermann kirjoitti:
>
>> Compare results before and after. One possibility is that the
>> DSL-G624T has RIP or RIP2 active. If the router or some other device
>> on your LAN is advertising a weird route, it might send the default
>> route on the two machines off to weirdness. I have no idea why it
>> would take an hour for this to happen, but it's worth checking anyway.
>
>I went back to router settings. RIP is disabled.
>
>I disabled DHCP server and set fixed IP for WIN and Linux clients.
>Now connection doesn't disconnect after an hour.
>DHCP lease time is set 3600 seconds.

Ok, there's your 1 hour disconnect. I'm not sure which device to
blame. The DHCP client should start to try renewing the lease at 1/2
the lease time (30 minutes). If it fails, it will try with increasing
frequency. I suspect the renewal is failing for some reason. My
guess(tm) is that it's some issue with the DSL-624T. You might try
testing the DHCP server from Windoze with:
ipconfig /release
ipconfig /renew
and display the results with:
ipconfig /all
Also, try the DHCP/BOOTP query tool at:
| http://www.weirdsolutions.com/weirdS...ytool_free.exe
and see if it offers any clues.

>But, I would need DHCP server when my friends will visit my LAN.

If possible, set the DHCP server for a much longer lease time.


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann kirjoitti:

>
> Ok, there's your 1 hour disconnect. I'm not sure which device to
> blame. The DHCP client should start to try renewing the lease at 1/2
> the lease time (30 minutes). If it fails, it will try with increasing
> frequency. I suspect the renewal is failing for some reason. My
> guess(tm) is that it's some issue with the DSL-624T. You might try
> testing the DHCP server from Windoze with:
> ipconfig /release
> ipconfig /renew
> and display the results with:
> ipconfig /all

Thanks Jeff, but what I should learn from above?

ipconfig /release kills remote connections.
SSH pipe is disconnected.

ipconfig /renew returns remote connections.

IP expires when DHCP lease time ends.

Well, I will connect my old ADSL modem (Roadrunner) and I'll have a
look when IP expires.

>
> >But, I would need DHCP server when my friends will visit my LAN.
>
> If possible, set the DHCP server for a much longer lease time.

I did it.

Antti

(E-Mail Removed) hath wroth:

>Jeff Liebermann kirjoitti:
>> Ok, there's your 1 hour disconnect. I'm not sure which device to
>> blame. The DHCP client should start to try renewing the lease at 1/2
>> the lease time (30 minutes). If it fails, it will try with increasing
>> frequency. I suspect the renewal is failing for some reason. My
>> guess(tm) is that it's some issue with the DSL-624T. You might try
>> testing the DHCP server from Windoze with:
>> ipconfig /release
>> ipconfig /renew
>> and display the results with:
>> ipconfig /all
>
>Thanks Jeff, but what I should learn from above?

Look at the line in
ipconfig /all
with the DHCP lease expire time. Note that there will be TWO lease
times. One for the local LAN IP address 192.168.0.xxx, and one for
your VPN tunnel. The first comes from the DSL-624T. The 2nd comes
from the server at the other end of the tunnel.

If either expiration time coincides with your disconnects, then that
is what's causing your disconnects. My guess(tm) is that your
DSL-624T DCHP server is delivering the minimium 1 hr lease time and
failing to honor a DHCP renewal.

In addition, if the default gateway is at the other end of the VPN
tunnel, the DHCP renewal requests (they're unicast, not broadcast)
*MAY* go through the tunnel and not hit your local router. Not all
configurations are like this, so first we run a quick test. When
connected to the VPN, try to ping your local router IP:
ping 192.168.0.1
If that works, DHCP renewal will work. If that does NOT work, then
the client will be unable to renew the DHCP IP address and may
disconnect after about 1 hour. I say "may" because what it seems to
depend on client configuration. Kinda hard to tell for sure without
system details and diagnostic output.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

please help ihave a d-link DSL-G624T my rooter takes ip and its on line
but i cant browzie pages with the explorer.my ips are correct.im loosing
my mind.i only log on when the demilitirized is on.


------------------------------------------------------------------------
View this thread: http://www.wirelessforums.org/showthread.php?t=9796
http://www.wirelessforums.org

On Mon, 21 Jan 2008 16:54:05 -0500, mim
<(E-Mail Removed)> wrote in
<(E-Mail Removed)>:

>please help ihave a d-link DSL-G624T my rooter takes ip and its on line
>but i cant browzie pages with the explorer.my ips are correct.im loosing
>my mind.i only log on when the demilitirized is on.

To help you we need a lot more information in plain English.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>