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Powering APs from a 2911 with PoE switch module

Andy Johnson
Level 1
Level 1

Good Morning everyone!

 

I am hoping someone can shed some light on an issue I am having at a client site. 

 

Client has purchased a 2911 ISR and an 8 port switch module with PoE card with the intention of running 4 2602i access points being managed by a 2504 WLC on the same switch card. 

 

Problem we have is that the APs come up but do not power up radios or cleanair. If I plug an AP into switch port 0/0 it comes up and works fine but not on any of the other ports. We saw this on a separate router, (they are doing the same setup to two sites), yesterday. That's why I was called in, as they could only get one AP working at a time. 

 

I believed this was a faulty poe card as it looks as though the APs are just not getting enough power and are placing the radios into RESET mode. Moved to the other ISR and everything worked fine, left it running overnight came in and all was fine and dandy. 

As the other router had only a basic config on we did the config which involved some ACLs and a few port configurations but nothing on the switch card and nothing pertaining to power. I am a wireless guy, not a router specialist so am a bit stymied. Sometime later we noticed that all of the APs had all radios in RESET state. 

 

Next I wiped the config on the ISR and rebooted everything and everything came up fine so points towards not a hardware issue but configuration. 

 

Where should I be looking? 

 

I can't paste a full running config due to client constraints but if someone could point me in the direction I can clean parts of the config for sharing... 

 

 

 

1 Reply 1

Leo Laohoo
Hall of Fame
Hall of Fame
I believed this was a faulty poe card as it looks as though the APs are just not getting enough power and are placing the radios into RESET mode. 

I haven't played with those modules for a long time, but what do you get when you run the command "sh power inline"?

 

2600 APs require a minimum of 15.4w PoE but the recommended is 20.0w PoE.  

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