From: MMoniz (ccie2002@tampabay.rr.com)
Date: Wed May 05 2004 - 17:17:36 GMT-3
Kenneth, if I understand this correctly, when you use 802.1p on the Cat, (I
assume you are talking about the Cat)
You are basically using ISL functionality. Voice packets will be tagged with
an 802.1p priority of 5 and all traffic will use the native VLAN for
traffic, so no seperate voice VLAN.
802.1q allows for seperate VLAN's for both voice and data. Kind of a psuedo
trunk. Each can have traffic marked accordingly.
Look at these 2 different IOS Cat links. One is older 12.1.14 and the other
is 12.1.19. So there are some minor dif's
http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration
_guide_chapter09186a00801a6b2e.html#1034347
http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration
_guide_chapter09186a00801cdf35.html
Mike
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Kenneth Wygand
Sent: Wednesday, May 05, 2004 3:41 PM
To: ccielab@groupstudy.com
Subject: 802.1q/p
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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