RE: ISL Trunking vs dot1q

From: Asbjorn Hojmark (Asbjorn@xxxxxxxxxxx)
Date: Thu Mar 01 2001 - 20:16:29 GMT-3


   
> Has anyone experience the pros and cons of isl vs dot1q?
> I am asking about performance-wise and all equipments are
> ciscos.

I tend to use dot1q, because it's the standard. Also, dot1q is
supported by all new switches while ISL is only supported by
some.

> Why would one chose to use isl instead of dot1q?

If you need to transport token-ring in a trunk, ISL is the only
way to go. Some older boxes (also from other manufacturers) don't
support dot1q.

> And can the cisco WS2948G (only G) use isl?

No. All the Granite-based switches support only dot1q.

-A

--
Heroes: Vint Cerf & Bob Kahn, Leonard Kleinrock, Robert Metcalfe
Links : http://www.hojmark.org/networking/


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