From: Thomwin Chen (thomwin_chen@yahoo.com)
Date: Wed Oct 19 2005 - 12:37:25 GMT-3
It really depends
it's called trusted boundary feature
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12120ea2/3550cr/cli1.htm#wp1863313
...
The trusted boundary feature prevents security problems if users disconnect their PCs from networked Cisco IP phones and connect them to the switch port to take advantage of trusted CoS or DSCP settings. You must globally enable the Cisco Discovery Protocol (CDP) on the switch and on the port connected to the IP phone. If the telephone is not detected, trusted boundary disables the trusted setting on the switch or routed port (sets the trust state to not trusted) and prevents misuse of a high-priority queue.
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Rgds,
Thomwin
Cisco Nuts <cisconuts@hotmail.com> wrote:
Hello:
If a Cisco IP Phone is connected to a switchport and a voice vlan has been
configured, when would one use the trust device cisco-phone vs trust cos?
Can someone provide a clear explanation as when to use one over the other?
Thanks!!!!!!!!!!!!!
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