From: Prashanth (prashanthcm@yahoo.com)
Date: Sun Feb 09 2003 - 06:29:48 GMT-3
John,
I dont think this configuration works....
A switchport in 'Access mode' drops tagged ethernet
frames! because its not capable of understanding
tagged frames.... so the port should be in 'Trunk'
mode to understand tagged traffic.
switchport voice vlan 66 command sends a CDP message
to the IP Phone to tag the traffic with dot1Q with a
VLAN ID/tag of 66 for the PC connected to your IP
Phone to be in VLAN 5 you should configure the 'Native
VLAN' on this 'trunk port' to be 5, then u have
untagged traffic which belongs to VLAN 5 and tagged
traffic which belongs to 66!
I have tested this on the 2900/3500 XL puppies and I
know for sure an Access Port cannot accept tagged
frames.... but not sure if this is an exception on the
3550s as I have not tried it on a 3550.
anybody who has actually tried this config on a 3550
can comment that an 'Access Port' is capable of
understanding tagged frames from an IP Phone?
-prashanth-
--- Manish Gupta <manishgu@cisco.com> wrote:
> Jonathan
>
> Your configuration is correct. By Default Voice
> Packets will be tagged
> 802.1Q IP priority 5. For more information on this
> matter can be found at:
>
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12112cea/3550scg/swvoip.htm
>
> Thanks
>
>
> At 03:00 PM 2/7/2003 -0600, Jonathan Charles wrote:
> >How do you segment voice and data on the 3550.
> >
> >For example, let's say you have a 7960 with a PC
> daisy-chained off of it
> >connected to a port on the 3550. how would you
> divide these packets?
> >
> >Here is what I came up with:
> >
> >
> >Int fa0/4
> > Switchport voice vlan 66
> > Switchport access vlan 5
> >
> >
> >
> >With vlan 66 being the voice vlan and vlan 5 being
> the data vlan.
> >
> >Is this correct?
> >
> >
> >
> >Jonathan
> >.
> -Manish
> =====================
> Software Engineer, MCEBU
> CCIE: 10891 R&S
> (408)525-9786
> =====================
> .
>
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