From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Tue Oct 18 2005 - 01:27:03 GMT-3
But, in
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225sec/3550scg/swvoip.htm
Says:
The voice VLAN feature enables access ports to carry IP voice traffic
from an IP phone. The switch can connect to a Cisco 7960 IP Phone and
carry IP voice traffic. Because the sound quality of an IP phone call
can deteriorate if the data is unevenly sent, the switch supports
quality of service (QoS) based on IEEE 802.1p class of service (CoS).
Also in
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750m/12114ax/3750mscg/swqos.htm
Explains this Magical Auto-Qos method for Trusting and IPPhone, IMHO (do
not trust me), I think that this Cisco-Phone is a template coded for you..
I'm just guessing here for the information that you can find in
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_20/cmdref/ch2a_ins.htm,
here you can find that: cisco-phone: Connects the interface to a Cisco
IP phone and automatically configures QoS for VoIP. The CoS labels of
incoming packets are trusted only when the telephone is detected <- (off
course this is done via CDPv2)
HTH
Victor.
Victor Cappuccio wrote:
> Hello,
> I really think this does not respond to your question, but I was
> playing a little bit around with this little interesting features that
> Cisco SmartPorts and Macro has in their Cat3550, and they are cool if
> you run in a hurry to find documentation about how to configure a
> Voice Vlan and all that jazz (jejeje Sorry Scott I liked the word)
>
> Thanks to all
> Regards
> Victor.
>
>
> http://www.cisco.com/univercd//cc/td/doc/product/lan/c3550/12225sec/3550scg/swmacro.htm
>
>
>
> cat-1#show parser macro name cisco-phone
> Macro name : cisco-phone
> Macro type : default interface
> # Cisco IP phone + desktop template
>
> # macro keywords $AVID $VVID
>
> # VoIP enabled interface - Enable data VLAN
> # and voice VLAN (VVID)
> # Recommended value for access vlan (AVID) should not be 1
> switchport access vlan $AVID
> switchport mode access
>
> # Update the Voice VLAN (VVID) value which should be
> # different from data VLAN
> # Recommended value for voice vlan (VVID) should not be 1
> switchport voice vlan $VVID
>
> # Enable port security limiting port to a 3 MAC
> # addressess -- One for desktop and two for phone
> switchport port-security
> switchport port-security maximum 3
>
> # Ensure port-security age is greater than one minute
> # and use inactivity timer
> switchport port-security violation restrict
> switchport port-security aging time 2
> switchport port-security aging type inactivity
>
> # Enable auto-qos to extend trust to attached Cisco phone
> auto qos voip cisco-phone
>
> # Configure port as an edge network port
> spanning-tree portfast
> spanning-tree bpduguard enable
>
>
>
> Cisco Nuts 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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>
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