From: Hobbs (deadheadblues@gmail.com)
Date: Sun Aug 24 2008 - 17:00:32 ART
Hello,
I had a task that states the there are 7960 ip phones connected to a
switchport and the phone's cos value (cos 5) must be trusted. I used the
command:
int f0/7
mls qos trust device cisco-phone
but the answer had:
int f0.7
mls qos trust cos
I have 4 questions:
In this scenario, is there a difference between these two commands?
Are both enabling trust of the phones cos value?
Does the "trust device" require the "trust cos" command to take effect?
Consider if you are also using "switchport priority extend cos #" command,
does either option still work as normal?
here is the doccd reference and it seems both would do the trick.
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_44_se/command/reference/cli1.html#wp2331034
thank you,
Blogs and organic groups at http://www.ccie.net
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