[CentOS] CentOS 6 bridging problem.

Gordon Messmer
Wed, 04 Jul 2012 02:57:06 -0000

On 06/25/2012 05:22 AM, Rafa? Radecki wrote:
> Do you see an error in my configuration? Why is 10.20.0.108 not available?

I don't have a lot of managed switches around to do extensive testing.
The closest test I can do is on 5.8 with VLAN 2 and different IPs.
Based on that, everything seems like it should work.  Since you're able
to set up the addresses on the interface without a bridge, the
likelihood of a driver problem seems fairly low.  Did you ever send the
output of "brctl show"?  You should definitely be able to run tcpdump
on
eth0.20 and see any traffic on that interface.  You said that you saw
none when you tried to ping the Linux host from the network.  What about
the reverse?  Do you see data go out eth0.20 when you try to ping an
address in the attached subnet from the Linux host?