How to configure Voice Vlan in 5412 zl switch

[Srinivasalu.r]

Hi,

we have configured the Voice Vlan on 5412 & all phones are connected to this vlan port,

this ports are tagged member of this vlan,we don't have any data vlan.

when ports are connected to this vlan it's not taking any IP address,once we manuly configure the voice vlan then phones are getting the IP address & it's working.

my question here is why we have to give voice Vlan manully in phones,it has to take all info from DHCP server right?

1.can any one tell me how to configure onely voice vlan.(here all ports are tagged member of voice vlan,we don't have data vlan)
2.if we want to configure both Data & voice Vlan how to configure it.(here all ports are untagged member of data vlan & tagged member of voice vlan)

is ther any other configuration is required for this voice vlan?

[MichaelvLonden]

Hi,

We have Avaya VoIP (96xx) phones and this is how we have set up the network:

With older Avaya firmware there is no LLDP support, but uses DHCP instead.
Phone boot first in data VLAN and reboots afterwards in voice VLAN. You need DHCP option 242 (for 96xx phones)

DHCP scope vlan 10
L2Q=1,L2QVLAN=20

DHCP scope vlan 20
MCIPADD=,MCPORT=1719,L2Q=1,L2QVLAN=20,VLANTEST=60,HTTPSRVR=,HTTPDIR=,DSCPAUD=46,DSCPSIG=26


Avaya phones can with LLDP, but there are the mandatory commands:
1. Voice VLAN is configured with the command "voice"
2. Name of voice VLAN must contain start with the word "VOICE"

E.g.
vlan 10 name DATA_vlan
vlan 20 name VOICE_vlan
vlan 20 voice

With LLDP the config in data DHCP scope is not necessary.

Hope this helps.
Michael

[Srinivasalu.r]

Thanks Michael,

I need one more clarification.
1.I have only Voice Vlan,i don't have Data Vlan.
2.For Voice Vlan we have done following config

Vlan 10
name "Voip Vlan"
tagged A1-A20,Trk1-Trk2
Voice

3.For only Voice vlan the port are tagged to Voice or it's untagged to voice vlan.

[MichaelvLonden]

Hi,

the VoIP phones are connected to the tagged voice VLAN port.
So you configuration should work.


If you use Avaya phones and LLDP, the voice vlan name must start with VOICE.
You also need firmware 3.x for LLPD MED support for 96xx phones.

Regards,
Michael

[Pieter 't Hart]

you said:
I have only Voice Vlan,i don't have Data Vlan
...
once we manuly configure the voice vlan then phones are getting the IP address & it's working.
-----
michael said:
the VoIP phones are connected to the tagged voice VLAN port.
So you configuration should work.
-----

michael's statement is incorrect.

when phones first connect they don't know anything about the voice vlan used.
so they send UNTAGGED packets for dhcp-request.
as your port is not configured for untagged packets, the packet will be ignored.

when untagged packets reach the dhcp-server
- The dhcp-server may have the voice vlan configured in the options.
- only after the phone has recieived a dhcp-respons (without vlan option) in the untagged vlan then LLDP can supply the voice vlan-id to the phone
- or you need manual configuration.

[Jedda]

Hi
vlan VOICE
name "VOICE"
qos priority (high priority
ip helper-address (dhcp server)
ip address (ip address of vlan)
tagged (port you want to tagged
exit
You have to configure some extra option in DHCP server for your voip phone, these information you should have from voip system provider.

[YenLin]

Hi all,

Our voice vlan is vlan 2060 and below is the configuration.

ip helper-add ad1

ip helper-add ad2

ip add 10.1.1.1/24

ip ospf 10.1.1.1 area 10.1.0.0

qos priority 5

voice

We've got 6 *5400 switches and they use ospf on vlan 1000 to do routing.

However, some of the IPT are connected to 5400A which assigned a 5400B's ip range.

or IPT connected to 5400C assigned a 5400A's ip address.

Our IPT use Polycom 235T.

I think there isn't any dhcp option that we need to config.

But can any one tell me how to troubleshoot this problem?

Otherwise, I think I need to config static on dhcp server.

[profevirtualcol]

I invete you to give a look to this...

Steps to configurate a VLAN Voice PORT

In short we have to follow this steps:

1. Be sure you have installed the phone file.bin

2. Give a name to the VLAN

3. Configure the interface

- Assigned port

- Tagged process

-Assigned VLAN

-Encapsulation

-IP if need

-Full duplex

I hope it cuoul be usefull.

[RJM3]

It sounds like you are tagging a VLAN on the ports.  There is always an untagged VLAN which is probably the default VLAN then if you didn't configure any other DATA VLANs.  If you untag the VOICE VLAN on the ports the DHCP should get to your phones, but if there is no DHCP on the untagged VLAN your phones won't get connectivity until you manually configure them. 

Most VOIP phones that I have worked with will do a DHCP request on the untagged VLAN (native in cisco speak) and get config settings from the DHCP server that tell it to switch to a different VLAN.  Once the phones use the 802.1Q settings to the other VLAN they will do another DHCP request on that VLAN which gets them settings from the phone system.