SoundPoint IP321 and LLDP MED setup

[Anonymous]

I'm trying to set up what I initially thought was a simple set up;

All data devices sit on the default VLAN, with LLDP to put all our VOIP handsets onto our VOIP VLAN (821), however I'm unable to make this work with our SoundPoint IP 321 units.

The switches are Dell PowerConnect 6248Ps running 3.3.4.1

The bootlog from the SoundPoints seems to indicate that they get an LLDP reply from the switch, the VLAN is assigned early on the in the process, then LLDP neg happens again and the VLAN is lost - the phone then gets DHCP info from the server on the data VLAN. Statically setting the IP address to the VOIP vlan details doesn't help. The switch shows the port remains in a Voice enabled configuration.

Is there anything else, other than enabling LLDP on the phone keypad setup, I need to do to get this working?

ss-edi-stack-1#show voice vlan interface 5/g25
Interface...................................... 5/g25
Voice VLAN Interface Mode...................... Enabled
Voice VLAN ID.................................. 821
Voice VLAN COS Override........................ False
Voice VLAN DSCP Value.......................... 46
Voice VLAN Port Status......................... Enabled
Voice VLAN Authentication...................... Enabled
Voice Device MAC Address
------------------------------

Boot log is attached

[SteffenBaierUK]

Hello Alan,

welcome to the Polycom Community.

Using the Community => search <= with the keyword LLDP I found this post => here <=

Above also uses a Dell Switch and this could be an issue on their end.

Please check this post and attempt to modify the settings as suggested. 

If above fails you may want to work with Dell Support and involve your Polycom Reseller Vcomm as they have sold your phone and are your support contact in case you need to raise this issue with Polycom support for further troubleshooting.

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services

[Anonymous]

Thanks - I did run through that post before posting, but revisiting did indirectly lead me to the solution: One of the TLV fields must be made up of the port description: I didn't have port descriptions set which was causing the fail conditions described.

Thankyou!

Alan

[SteffenBaierUK]

Alan,

could you post your working configuration and mark the post as solution?

Best regards

Steffen Baier

[Anonymous · Accepted solution]

Enabled LDDP on phone menu, set the following on the switch port interface on the Dell 6200

ss-edi-stack-1#show running-config interface ethernet 5/g25
switchport voice detect auto
description 'Port 5/g25'
switchport mode general
switchport general allowed vlan add 821
lldp transmit-tlv port-desc sys-name sys-desc sys-cap
lldp transmit-mgmt
lldp notification
lldp med
lldp med confignotification
lldp med transmit-tlv location
lldp med transmit-tlv ex-pse
lldp med transmit-tlv ex-pd
lldp med transmit-tlv inventory
voice vlan 821

Also set the following in general config on the switch:

hostname "my switch"
snmp-server location "my place"
voice vlan

[Anonymous]

On the off chance you venture back here to see this, THANK YOU FOR DOCUMENTING THIS.  I've been swearing at a Polycom WVX500/Dell 5548P combination for 2 days, aggrivated that I can't find a flaw in my LLDP-MDP configuration, to finally learn that the "Port Description" TLV field is NOT optional in this situation.  I set it to be sent on my test port, and I'm finally getting the VLAN assignment that I need.

Thank you.

[Anonymous]

Had the same issue with Polycom VVX 411 and Ubiquiti Unifi switch. All I had to do is apply names to the switch interfaces and that resolved the issue. The names displayed by default in gui are for reference only. 

Mike