VIgor 2600 - Dropped DNS?

A friend of mine is getting what appears to be dropped connections on
his Vigor 2600 router regularly once or twice a day, usually it
recovers between a few minutes and an hour.

During these periods, machines on the LAN can successfully ping
external addresses from each machine, but ONLY if using numeric
addresses i.e.

ping 123.456.789.100 works OK
pint bbc.co.uk does not work

This would seem to indicate that DNS access is being lost during these
periods. All DNS requests are being passed through the router, i.e. no
DNS entries specified in router or PC's.

When the system is up, ipconfig returns DNS's of
192.168.1.1 (the router)
194.98.0.1

Any ideas why the DNS should appear to be being dropped? Thanks.

- Mike

Why is the primary dns set to your router? Set the dns servers on the client
machines to your ISPs dns servers. This should solve his issue.

Andy

"Shonk" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> A friend of mine is getting what appears to be dropped connections on
> his Vigor 2600 router regularly once or twice a day, usually it
> recovers between a few minutes and an hour.
>
> During these periods, machines on the LAN can successfully ping
> external addresses from each machine, but ONLY if using numeric
> addresses i.e.
>
> ping 123.456.789.100 works OK
> pint bbc.co.uk does not work
>
> This would seem to indicate that DNS access is being lost during these
> periods. All DNS requests are being passed through the router, i.e. no
> DNS entries specified in router or PC's.
>
> When the system is up, ipconfig returns DNS's of
> 192.168.1.1 (the router)
> 194.98.0.1
>
> Any ideas why the DNS should appear to be being dropped? Thanks.
>
> - Mike

On Fri, 05 Mar 2004 22:03:33 GMT, "Bigmaggot"
<(E-Mail Removed)> wrote:

>Why is the primary dns set to your router?

some routers act as DNS forwarders. One of mine does.

>Set the dns servers on the client
>machines to your ISPs dns servers. This should solve his issue.

Or better yet, leave them to be automatically assigned by dhcp.

In article <(E-Mail Removed)>, Mark McIntyre
wrote:
> >Set the dns servers on the client
> >machines to your ISPs dns servers. This should solve his issue.
>
> Or better yet, leave them to be automatically assigned by dhcp.

I thought DHCP only assigned local addresses. If software is set to
assign a DNS automatically, isn't it the service provider that does
this?

Rod.

Have a router act a dns forwarder for 1 or 2 users, why bother? He probably
has a really cheap router that can't cope. Set the ISPs dns servers and then
you can troubleshoot further.

"Mark McIntyre" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Fri, 05 Mar 2004 22:03:33 GMT, "Bigmaggot"
> <(E-Mail Removed)> wrote:
>
> >Why is the primary dns set to your router?
>
> some routers act as DNS forwarders. One of mine does.
>
> >Set the dns servers on the client
> >machines to your ISPs dns servers. This should solve his issue.
>
> Or better yet, leave them to be automatically assigned by dhcp.
>

Shonk wrote:

> A friend of mine is getting what appears to be dropped connections on
> his Vigor 2600 router regularly once or twice a day, usually it
> recovers between a few minutes and an hour.
>
> During these periods, machines on the LAN can successfully ping
> external addresses from each machine, but ONLY if using numeric
> addresses i.e.
>
> ping 123.456.789.100 works OK
> pint bbc.co.uk does not work
>
> This would seem to indicate that DNS access is being lost during these
> periods. All DNS requests are being passed through the router, i.e. no
> DNS entries specified in router or PC's.
>
> When the system is up, ipconfig returns DNS's of
> 192.168.1.1 (the router)
> 194.98.0.1
>
> Any ideas why the DNS should appear to be being dropped? Thanks.
>
> - Mike

Simple cure ,add the IP addresses of your ISP DNS manually to each PC ,this
still works if you use dhcp .

If the above does not work try pinging the DNS when you are having a problem
to see if they are visable to your router.

The problem may be a routing issue between you and the DNS servers
--
Ian Grindey
Outgoings certified Microsoft free
Checked with Suse 9

On 5 Mar 2004 06:14:02 -0800, (E-Mail Removed) (Shonk) wrote:

>A friend of mine is getting what appears to be dropped connections on
>his Vigor 2600 router regularly once or twice a day, usually it
>recovers between a few minutes and an hour.
>
>During these periods, machines on the LAN can successfully ping
>external addresses from each machine, but ONLY if using numeric
>addresses i.e.
>
>ping 123.456.789.100 works OK
>pint bbc.co.uk does not work
>
>This would seem to indicate that DNS access is being lost during these
>periods. All DNS requests are being passed through the router, i.e. no
>DNS entries specified in router or PC's.
>
>When the system is up, ipconfig returns DNS's of
> 192.168.1.1 (the router)
> 194.98.0.1
>
>Any ideas why the DNS should appear to be being dropped? Thanks.

I've had the same thing with both my Vigor 2600We and a Vigor 2200
which I've previously used. Sometimes it works ok for weeks, then I
get the same annoying DNS problem you describe. Its seems to resolve
itself in the end and I've never worked out why it happens.

"Bigmaggot" <(E-Mail Removed)> wrote in message
news:VPi2c.9911$(E-Mail Removed)...
> Have a router act a dns forwarder for 1 or 2 users, why bother? He
probably
> has a really cheap router that can't cope. Set the ISPs dns servers and
then
> you can troubleshoot further.
>
> "Mark McIntyre" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > On Fri, 05 Mar 2004 22:03:33 GMT, "Bigmaggot"
> > <(E-Mail Removed)> wrote:
> >
> > >Why is the primary dns set to your router?
> >
> > some routers act as DNS forwarders. One of mine does.
> >
> > >Set the dns servers on the client
> > >machines to your ISPs dns servers. This should solve his issue.
> >
> > Or better yet, leave them to be automatically assigned by dhcp.
> >
>
>

I dont think the 2600 series falls into the "Really cheap" bracket. These
are top notch routers. I have them at work hapilly looking after 1000's of
clients.

Fair one, forget it was a draytek router, these are ace, wouldn't swap it
for my cisco though

Andy

"Paul Landregan" <(E-Mail Removed)> wrote in message
newsdcb%(E-Mail Removed) g...
>
> "Bigmaggot" <(E-Mail Removed)> wrote in message
> news:VPi2c.9911$(E-Mail Removed)...
> > Have a router act a dns forwarder for 1 or 2 users, why bother? He
> probably
> > has a really cheap router that can't cope. Set the ISPs dns servers and
> then
> > you can troubleshoot further.
> >
> > "Mark McIntyre" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > On Fri, 05 Mar 2004 22:03:33 GMT, "Bigmaggot"
> > > <(E-Mail Removed)> wrote:
> > >
> > > >Why is the primary dns set to your router?
> > >
> > > some routers act as DNS forwarders. One of mine does.
> > >
> > > >Set the dns servers on the client
> > > >machines to your ISPs dns servers. This should solve his issue.
> > >
> > > Or better yet, leave them to be automatically assigned by dhcp.
> > >
> >
> >
>
> I dont think the 2600 series falls into the "Really cheap" bracket. These
> are top notch routers. I have them at work hapilly looking after 1000's of
> clients.
>
>

Thanks everyone, and Chris, I'm glad you've confirmed it's a genuine
problem.

I'll get my friend to set the DNS address explicitly on one of his
PC's, to see if it prevents that particular machine from dropping out.

- Mike