VLan voip phones passthrough

[andydis]

Does anybody here have VLANS for their VOIP and have pc's plugged into the phones?

 

 

switch ---> POE VOIP Phone ----> PC

 

if so does the PC always have to be on the same VLAN as the phone ?

 

or do you configure the port on the switch to be a trunk port and manually assign the phone vlan "voip" (using its config) and PC vlan "data" (using its nic properties) ?

[teejay]

Depends on your phones and switches, on ours with HP switches we set the HP switch port as a trunk with phone VLAN as untagged and the PC VLAN as tagged then set the PC VLAN in the phone for the PC connection.

[rrrrr]

We have hp switches and mitel phones. Tag phone vlan and untag pc vlan, set vlan on phone and it passes through untagged pc vlan

[DMcCoy]

Most phones should work with lldp too, with HPs I just set the phone vlan as "voice". Then tag ports phones might go in on this voice vlan, untagged on the PC one. The phones automatically pick and tag traffic on the voice vlan while passing though the untagged to the computer.

[teejay]

One thing I forgot to add, make sure you set up access control on your switches for the phone VLAN, just have a play with Wireshark and you'll see why ;-)

[sonofsanta]

Using a Comware switch (some HP/old 3COM) and an Avaya IP phone, the following works:

 

port link-type hybrid

undo port hybrid vlan 1

port hybrid vlan 999 tagged

port hybrid vlan 111 untagged

port hybrid pvid vlan 111

poe enable

stp edged-port enable

Where VLAN 999 is the Voice VLAN and VLAN 111 is the client VLAN. Connect port to phone, and then phone to client.

[linkazoid]

If you use Siemens handsets, you need to configure a DHCP option for the PC to get the right IP address too.

 

This does however stop PXE booting, at least it does for us.

[IanT]

On HP you tag the VOIP VLAN and untag the client vlan

 

Make sure the VOIP VLAN has the commnd "voice" enabled.

 

Also some phones may need configuring to tell it was vlan to be tagged on.

[ful56_uk]

I have a question, we are about to get a voip system here. on the uplinks from the edge switches to the core do you have to tag them on voice vlan or untagged them on the voice vlan?

[localzuk]

I have a question, we are about to get a voip system here. on the uplinks from the edge switches to the core do you have to tag them on voice vlan or untagged them on the voice vlan?

 

Usually, all VLANs are tagged on trunks, and untagged on edge ports.

[ful56_uk]

Another question, do I need to step up any acls on the voip vlan?

[ellsandell]

In cisco land. (Not includomg any QOS)

switchport mode access

switchport access vlan xxx

switchport voice vlan xxx

[ful56_uk]

Hp land for me. Is it necessary?

[ellsandell]

Hp land for me. Is it necessary?

 

QOS? I wouldn't say necessary no, useful on congested networks/ larger networks to ensure voice/video is smooth/jitter free.

[ful56_uk]

Sorry I meant ACL's

[ellsandell]

Sorry I meant ACL's

 

Without seeing the rest of your LAN setup/PBX hard to say. Just makes things more secure if you setup an ACLs generally.

 

Good overview here (in Cisco but the principles are the same)

 

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swacl.html

Edited July 7, 2016 by ellsandell

[timbo343]

This might help? https://community.spiceworks.com/topic/409714-hp-procurve-vlan-configuration-for-voip

Im going to be doing the same in a few weeks as we are having a new phone system installed as a hybrid setup (analogue / digital and IP phones). Another thing to get my teeth stuck into.

Ill be putting the phones on a VLAN too ad its seems the most sensible way to do things.

Edited July 7, 2016 by timbo343

[ITGuyWestMidlands]

One thing I forgot to add, make sure you set up access control on your switches for the phone VLAN, just have a play with Wireshark and you'll see why ;-)

 

Fancy saving me trouble? 🙄