Wireless Access

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Occasional Contributor I
Posts: 9
Registered: ‎12-04-2013

On an AP-275, which ethernet port (WAN or LAN) do I connect to my switch to use POE for power?

I never deployed an AP-275, but I'm testing it in my lab before the installation.

In the installation guide, it states that "The WAN port supports 802.3at Power over Ethernet (PoE), accepting 48 VDC (nominal) as a standard defined Powered Device (PD) from a Power Sourcing Equipment (PSE) such as a PoE midspan injector."  Does this mean that ONLY the WAN port will accept POE+ and, therefore, I should plug the ethernet cable from my switch into the WAN port instead of the LAN port?

I tried this scenario but it didn't work... with only the WAN port connected to a POE switch, the AP  powered on but it didn't work, if I connected both ports (WAN + LAN) it worked...

Is it the correct deployment?

 

Thanks in advance

Regards

Gian

MVP
Posts: 1,310
Registered: ‎11-07-2008

Re: On an AP-275, which ethernet port (WAN or LAN) do I connect to my switch to use POE for power?

You may need to give more information. But the WAN port should be the primary uplink for the AP, and is where the AP should get it's IP via DHCP and communicate with the network/controller through.

 

What switch are you connecting it to, and why are you using both interfaces? What is the LAN/second interface connected to?

 

And my apologies, I despise the WAN/LAN label, it should be ENET0 (WAN) and ENET1 (LAN). the ENET1/LAN port will not power the AP. Typically that port is only when you need to hang another network device off the AP (very rare).

Jerrod Howard
Sr. Techical Marketing Engineer
MVP
Posts: 1,310
Registered: ‎11-07-2008

Re: On an AP-275, which ethernet port (WAN or LAN) do I connect to my switch to use POE for power?

Also, any POE (802.3at switch) must support LLDP, or the AP will not come up.

Jerrod Howard
Sr. Techical Marketing Engineer
Occasional Contributor I
Posts: 9
Registered: ‎12-04-2013

Re: On an AP-275, which ethernet port (WAN or LAN) do I connect to my switch to use POE for power?

Thanks for your reply.

Please can you show me where can I find this requirement on User Guide:

 

Also, any POE (802.3at switch) must support LLDP, or the AP will not come up.

 

Thanks in advance

Best Regards

Gian

MVP
Posts: 1,310
Registered: ‎11-07-2008

Re: On an AP-275, which ethernet port (WAN or LAN) do I connect to my switch to use POE for power?

It doesn't need to be in a guide, LLDP is part of the 802.3at spec. However some switches will claim 802.3at support but NOT enable LLDP by default (Cisco will not enable LLDP by default as they have their own mechanism). So if your switch is 802.3at and DOESN'T supprt LLDP, then it shouldn't claim 802.3at. If it does support it, you will need to enable it. Hope that helps

Jerrod Howard
Sr. Techical Marketing Engineer
Occasional Contributor I
Posts: 9
Registered: ‎12-04-2013

Re: On an AP-275, which ethernet port (WAN or LAN) do I connect to my switch to use POE for power?

Thanks for your support and explanation!

Best Regards

Gian

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