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T46G - Voice VLAN - 3cx - HP 4500G switch
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jholcombe Offline
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T46G - Voice VLAN - 3cx - HP 4500G switch

I have installed 3CX and set up a voice VLAN. I'm setting up a test system to see how the Yealink phones and 3CX will work in our environment, and so I can learn more about 3CX and Yealink phones. I want the phones to operate VoIP tagged on a voice VLAN. I want the workstations connected through the phones to operate untagged (default). I have configured the ports on a HP (3COM) 4500G switch as follows:

interface GigabitEthernet1/0/21
port link-type hybrid
port hybrid vlan 122 tagged {this is the VOICE VLAN}
port hybrid vlan 1 untagged {default VLAN for computers}
poe enable

On the default VLAN, I configured the DHCP server with option 132 to pass VLAN 122 to the phones when they boot up.

I have also modified the phone template to set the phones to VLAN 122.

When a phone boots:
1. It will obtain an IP address on the default network.
2. It will see the DHCP option 132 and switch to VLAN 122.
3. It will obtain an IP address on the VLAN 122 network.
4. It will briefly (about 10 seconds) reply to pings using the VLAN 122 IP address.
5. It will then revert back to the IP address it received on the default network, but it will remain on VLAN 122.

The phone actually communicates with the server somehow like this (the 3CX server is on the same layer-2 network, so could there be some layer-2 communications between the phone and the 3CX server), however, the phone is not reachable by pings (unless you put a host on VLAN 122 with an IP address compatible with the phone's IP).

Firmware version is: (doesn't appear to be available yet on Yealink's site).

I downgraded one of the phones firmware to version Now the phone gets a good IP address on VLAN 122, but the phone does not reply to pings, and is completely unreachable on the network on the 4500G switch.

I moved the phone to an older 3Com Switch 4400PWR (which is connected to the same 4500G switch) with a port configured the same way (untagged 1, tagged 122), and the phone boots properly, gets the correct IP address, and replies to pings. Also a computer plugged in through the phone gets a correct address on VLAN 1.

Any ideas on how I can get these to work on the 4500G switch?


(This post was last modified: 07-16-2014 05:40 AM by jholcombe.)
07-16-2014 05:26 AM
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T46G - Voice VLAN - 3cx - HP 4500G switch - jholcombe - 07-16-2014 05:26 AM

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