From: Vincent Mashburn (vmashburn@fedex.com)
Date: Wed Mar 22 2006 - 10:57:05 GMT-3
You should be able to use access ports with "switchport mode access" to
support both voice vlan and data vlan. This is due to CDP enhancements.
Bacisclly, the CDP packet includes both voice vlan and data vlan within
each update packet. So, the phone knows that its vlan is in the voice
vlan portion of the packet and the PC knows that its vlan is in the data
vlan portion of the packet. However, if you are not using Cisco Phones,
then you will have to use 802.1q trunking as indicated in the previous
e-mails.
Hope this helps
Vince Mashburn
Voice / Data Engineer
901-263-5072
Cisco IP Telephony Support Specialist
CCNP, CCDA,Network +
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Vishal Patel
Sent: Tuesday, March 21, 2006 5:04 PM
To: 'david robin'
Cc: 'Cisco certification'
Subject: RE: Voice vlan
I went thru the link you have send.
It explains the way to connect IP phones and PCs on different switch
ports ,
surely you can use access ports
Iam using one port for connecting to IP phones as well as PC.
Thatz why iam using dot1q trunk.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
david robin
Sent: Wednesday, 22 March 2006 9:32 AM
To: Vishal Patel
Cc: Cisco certification
Subject: Re: Voice vlan
thanks Vishal for you reply,
but the DOC CD dais that port fast is enabled when you configure vlan,
and
all the configuration is done with switchport access 3 not with native
vlans, please check it under :
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225sec/3550s
cg/s
w
voip.htm
in *voice vlan configuration guidelines*
your configuration may be right but i want to configure it with
swichport
access,
best regards,
On 3/22/06, Vishal Patel <vpatel@accessproviders.com.au> wrote:
>
>
> Iam using cisco voip phones and I have 3550 series switches.
>
> Below is my config for a switchport.
>
> interface FastEthernet0/4
> description Jahan-desk
> switchport trunk encapsulation dot1q
> switchport trunk native vlan 606
> switchport mode trunk
> switchport voice vlan 154
> End
>
>
> 606 is my data vlan and 154 is voice vlan
>
>
> I don't think spanning port fast is enable by default when I config
> voice vlan.
>
> Cheers
>
> Vishal
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of david robin
> Sent: Wednesday, 22 March 2006 9:10 AM
> To: Cisco certification
> Subject: Voice vlan
>
> dear all,
> I m confused a little with the voice VLAN, as I know the ip phone is
> attached to the switch with dot1q trunk, shall we configure sw trunk
> encap ???
>
> interface fast 0/7
> sw trunk encap dot1q
> sw access 3
> switchport voice vlan 5
> !
> I dunno if this right or not, I checked in the doc CD but they didnt
> say to configure this command, what they mentioned that the port fast
> is enabled by default when you configure the voice vlan, and this
> confuse me more, port fast is enabled only on access ports ????
>
> please help me about this issue
>
> best regards ,
>
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