From: Richard Davidson (rich@myhomemail.net)
Date: Wed May 05 2004 - 17:06:49 GMT-3
Yes, Dot1Q is a trunking protocol. When the link is
trunked the trunk header is placed on the frame. When
you want to mark some traffic with a higher layer 2
priority you adjust the 3 bit dot1p field that is in
the Dot1Q header.
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12119ea1/3550scg/swqos.htm#1032169
Rich
--- Kenneth Wygand <KWygand@customonline.com> wrote:
> Is 802.1p just the ISO standard nomenclature for the
> IP COS bits in an
> 802.1q frame? In other words, if a question says
> "make sure to use
> 802.1p for QoS" or "make sure to set high priority
> with 802.1p", does
> this just mean make sure to set the COS bits within
> an 802.1q frame?
>
>
>
> Sorry if this seems like a basic question, but I
> can't find any
> documentation that specifically solidifies this
> concept. I just want to
> make sure that I completely understand what is
> implied when a
> requirement is presented to employ 802.1p.
>
>
> Thanks!
>
>
>
> Kenneth E. Wygand
> Systems Engineer, Project Services
>
> CISSP #37102, CCNP, CCDP, ACSP, Cisco IPT Design
> Specialist, MCP, CNA,
> Network+, A+
> Custom Computer Specialists, Inc.
>
> "I am not really smart. I just stick with problems
> longer."
> -Albert Einstein
>
>
>
> Custom Computer Specialists, Inc.
>
> "Celebrating 25 Years of Excellence"
>
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>
>
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