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Author Topic: No VLAN on PoE?  (Read 2455 times)

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Offline Veldje21

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No VLAN on PoE?
« on: July 14, 2014, 07:52:20 AM »
Bonjour

The strangest thing happened, but I suspect it to be a wrong setting...

Whenever I hook up a Yealink T4x phone on the main switch, it gets power and access to VLAN 200. When I use the same phone on a remote switch, it cannot access VLAN 200 and stays in de default VLAN. Unless I use the external adapter and a soho switch (no PoE) it does access VLAN 200. And works.

What am I doing wrong here? Is there some setting I overlooked?


Offline Flintstone

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Re: No VLAN on PoE?
« Reply #1 on: July 14, 2014, 08:36:58 AM »
Hi Veldje21 and welcome to the forum,

I think the question is how is the remote switch configured differently to your main switch and how does your phone access Vlan 200 I.e. 1Q trunking and/or DHCP?

CheerZ

Offline Veldje21

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Re: No VLAN on PoE?
« Reply #2 on: July 14, 2014, 11:28:21 AM »
The switches are configured the same except for an extra vlan on the main switch. Even the trunks are configured on the same ports, 3 gbic's at 1gbit each.
The phones get provisioned with vlan 200 and after reboot connect to that vlan on the main switch but not the remote one. The funny thing is that if I use a small soho switch between the phone and the remote switch, it connects to the proper vlan. The PoE part is then no longer used therefore I suspect it being the cause.

Offline Johan Witters

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Re: No VLAN on PoE?
« Reply #3 on: July 15, 2014, 06:38:10 AM »
If you plugged in a dumb switch and the phone works, that would indicate that the vlans on the switch are correct, as the soho device just switches all packets without checking vlan header.

I think you need to check for other issues:
- have you tested with a different patch cable
- switch off poe on the switch port and try with the external adapter
- have you tried a different port on the switch?
- any security configured on the switch (MAC etc)

also, you might want to mention the switch model, it may ring a bell somewhere..


Johan
Kind regards,

Johan Witters

Network Engineer
BKM NV

Offline Veldje21

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Re: No VLAN on PoE?
« Reply #4 on: July 15, 2014, 03:11:27 PM »
I went through the configuration of botch stacks page by page and I found out that the LLDP settings were not the same. I changed all the ports from AdminStatus "txAndRx" to "rxOnly" and voila, access to the VLAN was granted directly ;-).

I have no idea what I just did, but I guess I can worry about that later. For now, it seems to be working.

FYI, all four (two stacks) switches are Nortel 5520-48T-PWR. I am not a network engineer, so forgive me if my question was silly ;-)

Greetings and thank you all.