From: Joe Martin (jmartin@capitalpremium.net)
Date: Tue Sep 16 2003 - 19:22:26 GMT-3
Allen,
From the following URL,
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12114ea1/3550scg/s
wvoip.htm#1030825
"You should configure voice VLAN on switch access ports."
This tells me that voice VLAN config does not need trunk commands.
Also, nowhere in the Voice VLAN section of the 3550 config guide does it
show trunk commands configured on voice vlan ports.
HTH,
Joe Martin
CCIE #12035
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
McClure, Allen
Sent: September 16, 2003 4:00 PM
To: McClure, Allen; Shawn Yang; ccielab@groupstudy.com
Subject: RE: Cat3550 voice vlan
Perhaps I shouldn't have assumed a PC. With a phone only it uses CDP to
figure it out on an access port, correct?
A repost or link to an authoritative explanation would be helpful for me
as well. I've been following the list for a long time and never felt
like anyone nailed it. I could've easily missed it however.
Allen G. McClure
CCNP/CCDP/MCSE
Yum! Brands, Inc.
Sr. Network Analyst
allen.mcclure@yum.com
-----Original Message-----
From: McClure, Allen
Sent: Tuesday, September 16, 2003 4:53 PM
To: 'Shawn Yang'; ccielab@groupstudy.com
Subject: RE: Cat3550 voice vlan
They're wrong.
I would add native vlan configuration for untagged data (PC) packets (a
reasonable assumption), although the requirement doesn't specify a PC
connected to the phone.
I'd love to hear more comments on this... I've been wrestling with the
"right" way to answer this question for quite some time.
Allen G. McClure
CCNP/CCDP/MCSE
Yum! Brands, Inc.
Sr. Network Analyst
allen.mcclure@yum.com
-----Original Message-----
From: Shawn Yang [mailto:syang@bitfone.com]
Sent: Tuesday, September 16, 2003 1:22 PM
To: ccielab@groupstudy.com
Subject: Cat3550 voice vlan
Hi, people,
Here is one question in Ipexpert 4.0, appendix H.
(For Cat3550)
There is a Cisco 7960 IP phone connected to fa 0/15, configure the port
as if the phone will be forwarding its voice traffic with 802.1q
information. Voice vlan is 100.
My answer:
mls qos
int fa 0/15
swi trunk encap dot1q
swi mode trunk
swi voice vlan 100.
mls qos trust cos
The solution:
int fa 0/15
swi mode access
swi voice vlan 100
I am having problem accepting this solution. Should a voice port have to
be a trunk port? Because it has to carry at least two vlans, voice, and
data? also "mls qos" is not enabled...
Anyone can help me?
Shawn
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This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:29 GMT-3