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From: Mike Viau on 1 Apr 2010 20:40






Mon, 29 Mar 2010 20:47:40 +1100 <alex(a)samad.com.au> wrote:
> On Mon, Mar 29, 2010 at 3:00 AM, Mike Viau <viaum(a)sheridanc.on.ca> wrote:
> > Could there be an issue with MTU size?
> >
> don't thing so
>
> [snip]
> >
> > My findings.
> >
> > # dig @10.254.2.254 google.com
> >
> > ; <<>> DiG 9.4.3-P2 <<>> @10.254.2.254 google.com
> > ; (1 server found)
> > ;; global options: printcmd
> > ;; Got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27942
> > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
> >
> > ;; QUESTION SECTION:
> > ;google.com. IN A
> >
> > ;; ANSWER SECTION:
> > google.com. 55 IN A 66.249.91.104
> >
> > ;; Query time: 4 msec
> > ;; SERVER: 10.254.2.254#53(10.254.2.254)
> > ;; WHEN: Fri Mar 26 01:02:53 2010
> > ;; MSG SIZE rcvd: 44
> [snip]
> >
> > So DNS does work on this box, as it forward DNS replies to other boxes on my
> > local network.
> >
> > What should I do next? Any ideas?
>
> try the dig command from one of the boxes that can't get dns, follow the packet with tcpdump
>
> all you have shown above is that your router can get dns
>
I do appreciate your assistance (everyone)! Looks like I found where the problem was. It was my /etc/network/interfaces file and how I was creating bridges on VLANs.

The configuration that works despite "File exists errors" during system boot was:


auto eth1.200
iface eth1.200 inet manual
auto br200
iface br200 inet static
address 10.254.2.1
netmask 255.255.255.0
network 10.254.2.0
broadcast 10.254.2.255
gateway 10.254.2.254
dns-nameservers 10.254.2.254
dns-search site
bridge-ports eth1.200


The configuration that does not works despite no errors during system boot was:


iface eth1.200 inet manual
auto br200
iface br200 inet static
address 10.254.2.1
network 10.254.2.0
netmask 255.255.255.0
broadcast 10.254.2.255
gateway 10.254.2.254
dns-nameservers 10.254.2.254
dns-search site
bridge-ports eth1.200


Any idea on how the working configuration could be modified to work and not leave "File exists errors" during system boot?


Thanks.



-M


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