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Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

[ Edited ]

Hello....

 

I got 4x Unifi AP - AC access points connected to PoE on Cisco Catalyst 3750-X (WS-C3750X-48P) switch over PoE and all 4x access points randomly rebooting every 1 ~ 5 min.

 

Switch only providing PoE to 4x access unifi pointing and using correct protocol used to auto detect the power and it's working fine for few minutes and then going for reboot.

 

Please note that Cisco switch got the latest FW and also Unifi controller and access points are on latest SW as well.

 

I saw incompatible issues with other Cisco switched and promted me to report this issue as well.

 

Note that I was using tough switch before and got no issues. I have consolidated all 7x tough switches with 1x 48 port switch and having these issues now.

 

Way the Acess points installed I don't have access to direct power supply and need urgent help guys.


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SuperUser
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

[ Edited ]

Are you saying you tried this procedure:

https://community.ubnt.com/t5/UniFi-Wireless/Workaround-for-UAP-AC-802-3at-non-compliance-POE-power-...

And it still doesn't work right? That post says specifically that the 3750-X (with 12.2(55)SE3 , 12.2(58)SE1 and later releases) can work around the bug that exists with Cisco routers and higher current drawing equipment.

 

CSCsw18530 - Power Imax / Tstart errors may be reported with some third party PDs

Symptoms:
Power Imax / Tstart errors may be reported with some third party PDs

%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Power Controller reports power Imax error detected

%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/35: Power Controller reports power Tstart error detected

Conditions:
Seen with some of the 3750,3750G,3750-E,3560-E, 3750-X, 3560-X, 3560-C, 2960S, 2960,2960C switches

Workaround:
Longer cable (>50ft) seems to fix the issue in most cases.

Solution
This issue is fixed in 12.2(55)SE3 , 12.2(58)SE1 and later releases. The following  interface configuration commands have to be applied to resolve the issue,

Switch(config)# int x/y
Switch(config-if)# power inline port 2x-mode
Switch(config-if)# shut
Switch(config-if)# no shut

The fix is present in the following platforms only :
3750-E, 3560-E, 3750-X, 3560-X, 3560-C, 2960S, 2960,2960C. The other platforms do not support 2X power mode and the workaround would be to use a longer cable.

If you see any abnormal behavior on PoW, use the show inline power and show inline power detail privileged EXEC commands to compare the number of connected powered devices against the switch power budget (available PoE). Verify that switch power budget can power the device.
I did it my way .... Man Happy

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SuperUser
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Manufacturing date for those 4 UAP-AC-Pros?
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Hi @sniferx1,

Could you confirm the model you are using? Are these the UAP-AC (square), or newer UAP-AC-Pro (round).

If UAP-AC, please confirm if they are v1 or v2 (in controller, v2 will be labelled as such under device properties).

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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Many thanks for prompt responses guys. I got 3x UAP-AC (square) V1 and 1x UAP-AC (square) V2.

Issue present with all 4x units.
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

I would suspect the UAP-ACs aren't getting the necessary power.  There was an issue with certain Cisco switches that cause the APs to reboot under heavy load.

 

Have you tried this workaround? 

https://community.ubnt.com/t5/UniFi-Wireless/Workaround-for-UAP-AC-802-3at-non-compliance-POE-power-...

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Member
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

I read it and as per my initial comments I am using latest Cisco Software: 15.2(4)E1 (UNIVERSALK9)

Also I am only using the switch to power these 4x APs and nothing else getting power and PoE meter showing plenty of free power capacity.

Other note is when reboot happening APs are not under heavy load at all.

Please let me know next steps?
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

After configuring 'power inline port 2x-mode' on each of the ports, you are still seeing the issue?

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Member
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

As per Cisco guide i can't find any commands to configure port 2x mode. Via power inline command I did try to set correct watt and same issue present. Can you pleas let me know how to configure or commands for 2x mode or Cisco guide that can help me.

Guide I used as below

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/conf/Po...
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Please help with this and let me know a way forward with this issue....
SuperUser
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

[ Edited ]

Are you saying you tried this procedure:

https://community.ubnt.com/t5/UniFi-Wireless/Workaround-for-UAP-AC-802-3at-non-compliance-POE-power-...

And it still doesn't work right? That post says specifically that the 3750-X (with 12.2(55)SE3 , 12.2(58)SE1 and later releases) can work around the bug that exists with Cisco routers and higher current drawing equipment.

 

CSCsw18530 - Power Imax / Tstart errors may be reported with some third party PDs

Symptoms:
Power Imax / Tstart errors may be reported with some third party PDs

%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Power Controller reports power Imax error detected

%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface Gi1/0/35: Power Controller reports power Tstart error detected

Conditions:
Seen with some of the 3750,3750G,3750-E,3560-E, 3750-X, 3560-X, 3560-C, 2960S, 2960,2960C switches

Workaround:
Longer cable (>50ft) seems to fix the issue in most cases.

Solution
This issue is fixed in 12.2(55)SE3 , 12.2(58)SE1 and later releases. The following  interface configuration commands have to be applied to resolve the issue,

Switch(config)# int x/y
Switch(config-if)# power inline port 2x-mode
Switch(config-if)# shut
Switch(config-if)# no shut

The fix is present in the following platforms only :
3750-E, 3560-E, 3750-X, 3560-X, 3560-C, 2960S, 2960,2960C. The other platforms do not support 2X power mode and the workaround would be to use a longer cable.

If you see any abnormal behavior on PoW, use the show inline power and show inline power detail privileged EXEC commands to compare the number of connected powered devices against the switch power budget (available PoE). Verify that switch power budget can power the device.
I did it my way .... Man Happy
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Posts: 162
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Many thanks.

I thought it's fixed in Cisco switch post the 12FW version. I will give this a go and will report.

Also this time I took time to read all posts in that thred and I do agree that when releasing devices with standards need to stick with it. Instruction manual for UAP - AC clearly saying its IEEE compliance and Cisco is well reputed brand and someone who pushing for IEEE. Simple test with commen Cisco switched prior to release should have picked this bug.

Thanks again Flipper......
Member
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

I tested with one AP and seems to be working OK. I will monitor and will put other 3x APs tomorrow morning.

 

Thanks again guys.....

 

@flipper Do you know anyway to get the Cisco switch to power the Unifi Video 24v CAMs? Just asking as when I check with UBNT support they said NO......

 

PanchiHouseCisco#show power inline Gi1/0/25 
Interface Admin  Oper       Power   Device              Class Max
                            (Watts)                            
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/25  auto   on         25.5    Linux               4     30.0 

Interface  AdminPowerMax   AdminConsumption    
             (Watts)           (Watts)           
---------- --------------- --------------------  

Gi1/0/25              30.0                 15.4
PanchiHouseCisco#show power inline          

Module   Available     Used     Remaining
          (Watts)     (Watts)    (Watts) 
------   ---------   --------   ---------
1           847.0       25.5       821.5
SuperUser
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

For any 24V stuff, I'd advise using the POE bricks designed for the products, or even segregating the Ubiquiti stuff on an Edgeswitch or Unifi switch.
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Member
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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Thanks mate. Will do.

 

Now the uptime on the AP > 30min with full load data copying and safe to say my issue now resolved. Thanks again.

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Re: Unifi AP AC rebooting every 1 ~ 5 min on Cisco Catalyst 3750-X (WS-C3750X-48P) Switch over PoE

Glad you're up and running finally!
I did it my way .... Man Happy
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