[CentOS] VLAN issue

Andrew Holway

andrew.holway at gmail.com
Sat Jan 24 13:32:06 UTC 2015


Hi Boris,

Is the switch port mode tagged or untagged.

Thanks,

Andrew

On 24 January 2015 at 13:35, Boris Epstein <borepstein at gmail.com> wrote:

> Do you need the whole configuration? On the switch end, we have the
> relevant VLAN (VLAN 48) with the assigned IP address of 192.168.48.101 and
> the range of ports (Gi1/0/1 - Gi1/0/8) assigned to that VLAN.
>
> Seems - and acts - like a legitimate setup and works fine, except for this
> particular instance.
>
> Thanks.
>
> Boris.
>
> On Fri, Jan 23, 2015 at 8:54 PM, Dennis Jacobfeuerborn <
> dennisml at conversis.de> wrote:
>
> > We have lots of servers with a similar setup (i.e. tagged vlans and no
> > ip on eth0) and this works just fine.
> >
> > What is the actual vlan configuration on your switchport?
> >
> > Regards,
> >   Dennis
> >
> > On 24.01.2015 01:34, Boris Epstein wrote:
> > > Steve,
> > >
> > > Thanks, makes sense.
> > >
> > > I just don't see why I have to effectively waste an extra IP address to
> > get
> > > my connection established.
> > >
> > > Boris.
> > >
> > >
> > > On Fri, Jan 23, 2015 at 7:16 PM, Stephen Harris <lists at spuddy.org>
> > wrote:
> > >
> > >> On Fri, Jan 23, 2015 at 07:10:57PM -0500, Boris Epstein wrote:
> > >>
> > >>> This makes two of us. I've done everything as you have described and
> it
> > >>> simply does not work.
> > >>
> > >> Are you actually seeing VLAN tagged traffic, or is the cisco switch
> > >> just providing a normal stream?
> > >>
> > >> At work we have hundreds of VLANs, but the servers don't get
> configured
> > >> for this; we just configure them as normal; ie eth0.  The network
> > >> infrastructure does the VLAN decoding, the server doesn't have to.
> > >>
> > >> Try configuring the machine as if it was a real LAN and forget about
> > >> the VLAN.
> > >>
> > >> If that doesn't work then what does 'tcpdump -i eth0' show you?
> > >>
> > >> --
> > >>
> > >> rgds
> > >> Stephen
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