From: Hobbs (deadheadblues@gmail.com)
Date: Mon Dec 08 2008 - 20:08:18 ARST
Thanks Carlos. That's what I was looking for.
On Mon, Dec 8, 2008 at 3:05 PM, Carlos G Mendioroz <tron@huapi.ba.ar> wrote:
> Hobbs,
> VLAN 0 is not a VLAN, is just a filler for the VLAN ID that is not being
> used. The port is an access port, the VLAN is whichever you assigned to it.
>
> Traffic being sent to the phone is not tagged.
>
> -Carlos
>
> Hobbs @ 8/12/2008 19:41 -0200 dixit:
> > Thank you Alexei.
> >
> > But how does traffic get TO or FROM this port with vlan 0 tagged?
> > How does it learn MAC addresses on this vlan? Does it send it out all
> trunk
> > ports?
> > "Show interface trunk" does not show vlan 0 as allowed or active...
> >
> >
> > On Mon, Dec 8, 2008 at 2:17 PM, Alexei Monastyrnyi <alexeim73@gmail.com
> >wrote:
> >
> >> Hobbs,
> >> as per 3550/3560 configuration guide:
> >>
> >> "Instruct the switch port to use 802.1P priority tagging for voice
> traffic
> >> and to use the default native VLAN (VLAN 0) to carry all traffic. By
> >> default, the Cisco IP phone forwards the voice traffic with an 802.1P
> >> priority of 5."
> >>
> >> HTH
> >>
> >> A.
> >>
> >>
> >> Hobbs wrote:
> >>
> >>> Disregard the first question...I had a freakin' ACL on R2. So the test
> is
> >>> GOOD.
> >>>
> >>> My question number 2 still remains...
> >>>
> >>> thank you,
> >>>
> >>>
> >>> On Mon, Dec 8, 2008 at 2:04 PM, Hobbs <deadheadblues@gmail.com> wrote:
> >>>
> >>>
> >>>
> >>>> Hello my friends,
> >>>>
> >>>> I have 2 questions regarding voice vlans:
> >>>>
> >>>> 1) Is it possible to test voice vlan by using subinterface and dot1q
> >>>> encapsulation on a router port:
> >>>>
> >>>> R1----SW1----SW2----R2
> >>>>
> >>>> R1 has a subinterface with "encap dot1q 2".
> >>>> SW1 has "voice vlan 2" on port to R1.
> >>>> Link SW1-SW2 is a trunk with all VLANs allowed.
> >>>> R2 is in vlan 2.
> >>>>
> >>>> R1's config:
> >>>>
> >>>> interface Ethernet0/0
> >>>> !
> >>>> interface Ethernet0/0.2
> >>>> encapsulation dot1Q 2
> >>>> ip address 139.1.2.101 255.255.255.0
> >>>>
> >>>> SW1:
> >>>>
> >>>> interface FastEthernet0/1
> >>>> switchport access vlan 11
> >>>> switchport mode access
> >>>> switchport voice vlan 2
> >>>> spanning-tree portfast
> >>>>
> >>>> Should R1 be able to ping R2 at 139.1.2.2 ? As of right now, I am not
> >>>> able
> >>>> to. When I debug icmp, packets from R2 reach R1, but packets from R1
> >>>> never
> >>>> get to R2. Looks like SW1 is not sending packets from the voice vlan
> over
> >>>> its trunk to SW2.
> >>>>
> >>>> 2) What vlan # is used when you configure "switchport voice vlan
> dot1p"?
> >>>> How does the switch know when to send traffic TO this port on the
> voice
> >>>> vlan.
> >>>>
> >>>> thank you,
> >>>>
> >>>>
> >>>
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> >
> >
> >
> >
> >
>
> --
> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
Blogs and organic groups at http://www.ccie.net
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