From: Pun, Alec CL (Alec.CL.Pun@pccw.com)
Date: Fri Nov 07 2003 - 07:47:43 GMT-3
HI Jin and voice experts,
I'm not sure whether I understand your "trunking" case, but I expect the
voice data should be always dot1q encapsulated as the DocCD said Cos always
equal to 5. The problem seem to be solved by enabling the voice vlan on an
access port.
But the data traffic from the attached PC can be tagged or not.
In each case, what switchport mode (i.e. trunk or access) is required on
3550 ? From DocCD, it said voice vlan should be configured on access port.
But if that's the case, how can it handle TAGGED data traffic coming in ?
many thanks
alec
-----Original Message-----
From: Jung, Jin [mailto:jin.jung@lmco.com]
Sent: Monday, October 27, 2003 9:36 PM
To: 'Rivalino YMT'
Cc: ccielab@groupstudy.com
Subject: RE: 2 Questions on Voice Vlan
Let me give it a try,
On 3550, or other IOS switches,
You have two options to support VoIP phone,
--Don't forget that Cisco phones are two port switch,
1, Phone will provide trunking,
2, Switch will provide trunking,
You have to setup trunking since you will have 2 VLANs going thru one switch
port, unless you are using two different ports to support phone and the PC.
And you have to define which one is for data and which is for voice,
So,
Case 1,
VoIP phone will provide trunking, -- DOT1Q, -- I think Cisco phone will only
support DoT1Q not ISL.
Switchport access vlan 500
Switchport voice vlan 100
Switchport trunk mode encap dot1q - this is optional, since dot1q is default
setting.
Case 2,
Switch will provide trunking
Switchport trunk mode encap dot1q
Switchport mode trunk
Switchport trunk native vlan 500
Switchport voice vlan 100
...
In your question , You used word "support", Are you saying phone will
provide trunking or switch will?
I mean phone will support DOt1q trunking, so does switch, but it does not
mean it will provide trunking.
You need to take a look at both these cases.
This topic has discussed before and you can find more on this in groupstudy
archive.
Jin Jung...
-----Original Message-----
From: Rivalino YMT [mailto:rivalino_ymt@BonBon.net]
Sent: Monday, October 27, 2003 9:23 AM
To: C
Cc: ccielab@groupstudy.com
Subject: RE: 2 Questions on Voice Vlan
Just want to know,
Why do you use 'switcport trunk native vlan 500'?
why not 'switchport trunk native vlan 100'? Voice packet is untagged packet.
Thanks,
Rv
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of C
Sent: Saturday, October 25, 2003 4:17 AM
To: loai@kuix.com
Cc: ccielab@groupstudy.com
Subject: RE: 2 Questions on Voice Vlan
This is what you should be using:
In my case I am using port 1 & 2 to connect to other switch using
EtherChannel, port 3 is connecting to IP phone and PC. What switch are you
talking about? My config is for 2924 and 3500's
interface FastEthernet0/1
duplex full
speed 100
port group 1
switchport trunk encapsulation dot1q
switchport trunk native vlan 20
switchport mode trunk
!
interface FastEthernet0/2
duplex full
speed 100
port group 1
switchport trunk encapsulation dot1q
switchport trunk native vlan 500
switchport mode trunk
!
interface FastEthernet0/3
switchport access vlan 500
switchport trunk encapsulation dot1q
switchport trunk native vlan 500
switchport mode trunk
switchport voice vlan 100
switchport priority extend cos 0
spanning-tree portfast
Chris
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
loai@kuix.com
Sent: Friday, October 24, 2003 4:27 PM
To: loai@kuix.com
Cc: ccielab@groupstudy.com
Subject: Re: 2 Questions on Voice Vlan
Dears..
No one can answer this question?
Where r u dears Experts?
----- Original Message -----
From: loai@kuix.com
Date: Thursday, October 23, 2003 12:14 pm
Subject: 2 Questions on Voice Vlan
> Dears..
> I have 2 Qeustions
>
> 1-If i have IP phone is attached to SW port for example(F0/10),this
> phone support dot1.q trunking.. andIf i want to configure this port to
> support voice on vlan100 and ensure that data goes to vlan500..
> in this case:
>
> interface FastEthernet0/10
> switchport access vlan 500
> switchport voice vlan 100
> switchport trunk encapsulation dot1q
>
> my question is
>
> 1-When it should be to use
> switchport mode trunk in this case..
>
> 2-whenI have to use
> switchport trunk native vlan?
>
> 3-Could some one provide me the last solution or configuration for
> this question..
>
> Thanx
>
> Nizar
>
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