Qos trust boundary & marking

From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Wed Aug 27 2008 - 07:38:00 ART

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I'm trying to nail smth:
Say you have

(a) - switch - (b) - IP Phone - (c) - Pc

And you have trust device cisco-phone at the switch.
1) PC sends frame with DSCP xx (no COS cause no L@ tag),
2) phone keeps DSCP and puts COS 0
3) switch is trusting phone, but by default copies COS to DSCP

so at (a) packet from PC has DSCP 0. Right ?

-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina

Blogs and organic groups at http://www.ccie.net

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