How many vlans per ethX ?

#1 (**permalink**) 21-Dec-2005, 12:23

OpenSuSE10

How many VLANs can use per eth0 ?

Serg

#2 (**permalink**) 21-Dec-2005, 12:45

Serg wrote:

> OpenSuSE10
>
> How many VLANs can use per eth0 ?

Most likely this is only restricted by the switch you are connected to and
the power of your SuSE 10.0 system.

--
Freek

#3 (**permalink**) 19-Jan-2006, 10:53

Serg wrote:

> OpenSuSE10
>
> How many VLANs can use per eth0 ?

I seem to remember something like 4092 as the upper limit for
VLAN tags in IEEE 802.1q, but can't find a reference right now.

HTH
Tilman

#4 (**permalink**) 22-Feb-2006, 05:54

The VLAN field in the Ethernet 802.1q frame header is 12 bits wide. There
are hints that you shouldn't use vlan_id=0 or 1 if you have Cisco switches.
http://scry.wanfear.com/~greear/vlan.html

--Steve

> Serg wrote:
>
> > OpenSuSE10
> >
> > How many VLANs can use per eth0 ?
>
> I seem to remember something like 4092 as the upper limit for
> VLAN tags in IEEE 802.1q, but can't find a reference right now.
>
> HTH
> Tilman

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