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Voice VLAN command - LLDP seems to stop working
I have a strange issue with the voice vlan command that I'm trying to isolate between our switches and Shoretel phones, but it seems there's no debug options for LLDP on this switch.
We use the...
Hi technotechnotec,
Were you able to update the firmware of the M4300-52G-PoE+ switch to v12.0.7.10? If yes, what are your observations?
Let me share the link and it might help:
Regards,
DaneA
NETGEAR Community Team
FWIW this issue seems to be fixed. Originally the config was
interface 1/0/1
voice vlan 10
switchport mode access
switchport access vlan 20
But the switch would randomly stop passing the tagged VLAN traffic. I changed the config to:
interface 1/0/1
voice vlan 10
switchport mode trunk
switchport trunk native vlan 20
switchport trunk allowed vlan 10,20
I haven't had a single DHCP failure/VLAN tag drop since moving to this config.
This behavior seems to only occur on the M4300 series - the M4100 actually rejects switchport mode access as a valid option when using voice VLAN (I have those access ports configured in general mode but I'll be updating them later for the sake of consistency). Maybe it would be nice in future updates to prompt users to use a trunk config when enabling voice VLAN on switchports so they don't spend their time flailing about like I did (this problem lasted for like, seven or eight months!). :)
To be clear, it wasn't LLDP failing to maintain the voice VLAN tag, it was the switch refusing to pass tagged traffic and the phone dropping the VLAN tag after DHCP repeatedly failed (which is normal Mitel/Shoretel behavior).
If anyone else googles this problem hopefully they find this post. :) :womanvery-happy:
I'm seeing pretty much this same exact issue on an S3300-52x-PoE+ switch, but there's no CLI on SmartSwitch models for me to configure your solution. Anybody have any ideas for this one? I've got OUI-based Auto-VoIP enabled for the ports, and under "Voice VLAN Configuration", I have the ports setup with "Interface Mode" as "VLAN ID 2".
Export your config, edit the config file off-line, and then reload the new config file in the switch.
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