Re: [nsp] Routing between VLANs using 802.1q

From: Everett Dowd (edowd@clark.net)
Date: Mon Jan 24 2000 - 21:58:25 EST


If you want to view trunks, use the sh trunks command...

G-2#q
Pinky_> (enable) sh trunk
Port Mode Encapsulation Status Native vlan
-------- ----------- ------------- ------------ -----------
 1/1 on dot1q trunking 1
....
Port Vlans allowed on trunk
-------- ---------------------------------------------------------------------
 1/1 1-1005
....
Port Vlans allowed and active in management domain
-------- ---------------------------------------------------------------------
 1/1 1-2,4-8,10,27,66,70-71,73-74,76,80,84,88,90,92,252

LOTS of output...

Michael Beckmann wrote:

> On Mon, Jan 24, 2000 at 01:03:19PM -0500, George Robbins wrote:
> > > Does this mean, I can do standard Ethernet and 802.1q at the same
> > > time ?
> >
> > yes. the 802.1q packets are tagged and a "trunk" port on the switch
> > handles them by directing them to a specific vlan, the non-tagged
> > packets are handled per the vlan membership of the switch port.
>
> This is where I have the problem. The switch port is either a trunk, or
> a VLAN member. Example:
>
> cat4003> (enable) sho port
> Port Name Status Vlan Level Duplex Speed Type
> ----- ------------------ ---------- ---------- ------ ------ ----- ------------
> 2/1 connected trunk normal full 1000 1000BaseSX
> 2/2 connected trunk normal full 1000 1000BaseSX
> 2/3 notconnect 1 normal full 1000 No GBIC
> 2/4 notconnect 1 normal full 1000 No GBIC
> 2/5 notconnect 1 normal full 1000 No GBIC
> 2/6 connected 1 normal full 1000 1000BaseSX
>
> > > I also believed that I should set the VLAN of the respective switch
> > > interface to "trunk". Is this not correct ?
> >
> > yes.
>
> Do I have to force it into "trunk" mode ?
>
> Thanks,
>
> Michael

--
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"Failure is not an option"
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<><><><><><><><><><><><><><><><><><><><><><><><><><><>
Everett Dowd              edowd@clark.net
CCIE #2409                http://www.clark.net/pub/edowd
Just bein' virtual =8^)   Welcome to the 'net
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