Subject: Re: [rbridge] Readiness of the VLAN Mapping Draft

From: Anoop Ghanwani <[email-masked]>
Date: Mon, 3 May 2010 22:31:43 -0700

> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]] On
> Behalf Of Anil Rijhsinghani
> Sent: Tuesday, March 30, 2010 7:57 AM
> 
> VLAN mapping is not a standard function, so the answer to
> this isn't straightforward. As with any non-standard thing,
> different people may implement it different ways.

IEEE 802 calls this function "VID translation" and
it is in the standard, but only for s-tags.  And that's
why I've been saying that we should call it by the
same name here as well...

Also, to answer Radia's question -
As far as I recall, the mapping is 1:1, i.e.
if A maps to B, then B must map to something else.
And it is symmetric; i.e. if we translate
the VID going out a port, then we must also
translate on the way in.  This also affects
protocols such as MSTP and M?RP where the
VLAN ID is carried within the control frame.

Anoop

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