Wired Intelligent Edge (Campus Switching and Routing)

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Highlighted
Contributor II

Re: No POE on MAS 1500

An update. We lost power to the switch this weekend. Upon power up we are in the same situation as before. The only ports that have POE enabled are the ports connected to the IAP 105s. If I do a sh poe interface I am receiving the same (code=24) on those ports.

 

GE0/0/21
--------
GE0/0/21: Administratively Enable, Port status: Off
Maximum power: 30000 mW, Power consumption: 0 mW
Port voltage: 0 mV, Port current: 0 mA
PD class: Class-3, Priority: Critical, PSE port status: off, (code=24)

 

I've tried downing all the ports except the uplink and the ports for the AP's but no luck.

 

One other thing I've notices the PSE port status is off. On a working switch the PSE port status is ON. I'm not sure what that signifies or how I would turn it "ON"

 

Thanks,

Mark

Highlighted
Aruba

Re: No POE on MAS 1500

Mark,

Shutting down the interface will not clear the error code if the switch is still receiving the power load which could be coming from your PoE enabled AT&T Router. Talking with engineering, they asked if you could try a ethernet cross over cable between the router and the switch. We'll handle crossing the data pairs but it may stop the PoE mis-feed.

 

Best regards,

 

Madani

Highlighted
Contributor II

Re: No POE on MAS 1500

Hi Madani,

 

I find it hard to believe that would be the problem. We have 40 other locations that have the same network connections / equipment in them without any issues. I.E. AT&T router connected to an S1500 Aruba MAS with 3 access points drawing power. Is there a manual way to clear this error code? I'm not sure if I pointed this out or not but the ports with the error code are the ones that the IAP 105s are connected to.

 

I do have a TAC case open, maybe they can shed some light.

 

Thanks,

Mark

Highlighted
Aruba

Re: No POE on MAS 1500

Mark,

As long as we are detecting voltage coming into the ethernet ports we cannot clear the error condition.

 

However now that I re-read your original post, you are shutting the ports down remotely and not disconnecting the cabling so it may not be the Router but something else at the site. In the lab we took three APs and attached them to an S1500 which powered up fine. We then purposely injected power into on the ether ports and the APs went down with the same error condition. Once we removed that voltage source, the issue when away. Unfortunately we need to isolate what port is getting that power from.

 

Best regards,

 

Madani

Highlighted
Contributor II

Re: No POE on MAS 1500

Is there a command that I can run to determine this or is this a manual process of unplugging cables one at a time?

 

Regards,

Mark

Highlighted
Aruba

Re: No POE on MAS 1500

Mark,

Unfortunately it is a manual process of unplugging the cables as far as I know.

 

Just to make sure there isn't something else going on with the PoE PSU, can you post the "show inventory" output?

 

Best regards,

 

Madani

Highlighted
Contributor II

Re: No POE on MAS 1500

Madani,

 

As requested:

 


Show Inventory
--------------


System Card Slot        : 0
SC Serial #             : CE0002037 (Date: 10/14/13)
SC Model Name           : ArubaS1500-24P
HW MAC Addr             : 00:0b:86:90:84:77 to 00:0b:86:90:84:b6
CPLD Version            : Rev: 1.12 (0x1.c)
PoE Firmware Version    : 2.4.8 (Build: 48)
CPU Assembly #          : 2010179B (Rev: 08.00)
CPU Serial #            : AD31014142 (Date: 09/28/13)
Power Supply            : Present (580W)
                        : 12V System Voltage Ok
                        : 56V PoE Voltage Ok
System Temperature      : CPU Temp                : 54  C
                        : Mid Temp                : 53  C
                        : DPE Temp                : 59  C
                        : Ambient Temp            : 30  C
System Voltages         : 12000mV Sense           : 12062.5 mV
                        : 5000mV 5VDD             : 4974.0 mV
                        : 3300mV Sense            : 3334.4 mV
                        : 900mV CPU               : 935.5 mV
System Fan Tachometers  : Power Supply Fan 0      : 4054  RPM (Low Speed)
                        : Power Supply Fan 1      : 4041  RPM (Low Speed)
                        : FAN 0                   : 7520  RPM (Normal Speed)
                        : FAN 1                   : 7692  RPM (Normal Speed)

Highlighted
Aruba

Re: No POE on MAS 1500

Okay, not a PSU issue. I was interested in the 56v line:

 

Power Supply            : Present (580W)
                        : 12V System Voltage Ok
                        : 56V PoE Voltage Ok

Highlighted
Contributor II

Re: No POE on MAS 1500

Hi Madani,

 

I worked with some staff at the location and we unplugged ehternet cords one by one and we were able to get the AP's to power up. The device that was plugged in was an HP Thin Client.

 

Please note these devices do not supply nor use POE.

 

Thanks,

Mark

Highlighted
Aruba

Re: No POE on MAS 1500

Mark,

It doesn't have to be a PoE device providing power toward us. PoE PSE devices are typically the culprit as they are capable of sending voltage down a link. Do all the sites have these thin clients? Anything different about this particular one, a unique model perhaps? Can the patch cord to this one be replaced? Perhaps its faulty and picking up some voltage from somewhere?

 

Best regards,

 

Madani