PC's and trunk ports

Unanswered Question
Jun 13th, 2007

Hi

If I have a trunk port on 3560 switch and I plug in a PC will that PC automatically join the native vlan? or will there be a problem.

Thanks

Dan

I have this problem too.
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mohammedmahmoud Wed, 06/13/2007 - 03:40

Hi,

IMHO, it won't operate as the PC won't be able to up the trunk in the first place.

HTH,

Mohammed Mahmoud.

dan_track Wed, 06/13/2007 - 04:24

Hi

I just connected two pc's together each in a trunk port and they can ping each other. I believe they just use the native vlan for the trunk port.

Regards

Dan

soin-kamal Wed, 06/13/2007 - 05:41

it will automatically a member of native VLAN No-1....

if that port is not defined as a trunk port...

If you are plugging the PC in port 1,it should not be trunked...

also allow trunk to forward the native VLANS.

mohammedmahmoud Thu, 06/14/2007 - 00:56

Hi,

Ok, after through thinking (and sorry for my fast wild guess before), since the Native VLAN frames will travel without being encapsulated or tagged accordingly the native VLAN is the VLAN to which the port will belong to if that link becomes non-trunk and thus i guess that the PC will be able to communicate via it, but the idea is that this is not a common practice scenario and might introduce problems since all tagged and untagged frames are flooded on this port, which might cause problems (I've tested it and the interface has counted CRCs).

HTH,

Mohammed Mahmoud.

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