[CentOS] VLAN issue

OK... but why does it need to be a trunk port?

Boris.

On Sat, Jan 24, 2015 at 6:53 PM, SilverTip257 <silvertip257 at gmail.com>
wrote:

> Andrew and Dennis are spot on.
> Their conclusions about your server being connected to an access port and
> not a trunk port would be my conclusion as well.
>
> On Sat, Jan 24, 2015 at 9:11 AM, Dennis Jacobfeuerborn <
> dennisml at conversis.de> wrote:
>
> > Hi Boris,
> > what I'd like to know is the actual VLAN configuration of the switch
> > port (link-type and tagged and untagged VLANs). When I look at the
> > switchport coniguration here I get (among other things):
> >
> > ...
> >  Port link-type: trunk
> >   Tagged   VLAN ID : 8, 1624
> >   Untagged VLAN ID : 10
> > ...
> >
> > Here is my suspicion:
> > Your ports have an access link-type with an untagged VLAN ID of 48. That
> > would explain why the moment you configure an IP from that VLAN on eth0
> > you get connectivity because then the packets the Linux box sends are
> > untagged as the switch would expect them to be. If you only put an
> > address on eth0.48 then the packets get tagged by Linux but if the
> > switch port is not configured to receive the packets for VLAN 48 as
> > tagged then it will simply drop these packets and you will not get
> > connectivity.
> >
>
> Additionally, the switch should gripe about 802.1q BPDUs.
> Check the in-memory system log (or syslog server if you have configured
> that).
>
> show logging | i 1Q
>
> Example:
> 1w1d: %SPANTREE-2-RECV_1Q_NON_TRUNK:
> Received 802.1Q BPDU on non trunk FastEthernet0/2 on vlan 100.
>
>
> >
> > So getting the actual VLAN config of the switch port would help to
> > determine if the switch actually expects to receive the packets the way
> > you send them from the Linux box.
> >
> >
> +1
> Let's see the config for the switch port your server is connected to.
>
> --
> ---~~.~~---
> Mike
> //  SilverTip257  //
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