Monitoring Power output on a POE switch

We just installed 12 AP's on a Cisco 3560 POE switch which currently has 6 AP's already connected to it.
The Customer is asking us to montior the power consumption on the switch.
What are the recommended methods for accomplishing this?
Thanks You for any input!

Kevin,
Have a look at this link:-
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/g_power_over_ethernet.html#wp1002308
Sample outputs of what to look for
Regards,
Alex.
Please rate useful posts.

Similar Messages

Monitor power consumption on non POE device using LMS 4.1 ?

How do i monitor power consumption of our endpoint device such as IBM server, UCS server, PC , etc which isn't powered by POE ?

I'm way to lazy to read all this stuff (that's my nature) but I tried a few things with an IP phone and an access point because a customer was interested.
TAC said to forget about the access point, LMS will only manage the IP phone.
Do you see these endpoint devices in LMS anywhere? I asume you managed to get the agent software and put them on these devices.
In theory they should then get 'discovered' as endpoints. Not sure how LMS would be able to do that though. Unless the endpoint agent knows about LMS and starts talking I don't see how it could work.
Anyway, the theory is that in LMS you have a group of endpoints in an endpoint group. Then you should be able to configure endpoint attributes.... , and then you should be able to create a policy and apply it to that group. But I think the policies you can create in LMS now, are for IP phones only.
You should also be able the generate power reports on an endpoint group. Provided you are able to discover these endpoints.
Do let us know how you are getting on with this though. Energywise is interesting but the current implementation in LMS may be a bit too minimalistic. (please prove me wrong)
Cheers,
Michel

Adding a PoE Switch to existing Network

Hello,
Currently we have a Linksys RV016 router with 3 Linksys SRW224G 24-Port Managed Switch. Can I add a PoE switch to my existing setup without any problems or I can only add none PoE switches?
If I can add a PoE switch is there a specific configuration or just plug and play?
Thanks,
B

Yes you can connect a PoE switch to the SRW224G switches but you will need to connect the PoE switch to a power supply. The only way that PoE (Power over Ethernet) will work is when you connect the PoE switch with another PoE switch. Only in this scenario, you won’t need to use a separate power supply for the PoE switch to work because it is getting its power form the first PoE switch / router.
Regarding if this will just be plug and play, it won’t be plug and play. If you have set up VLANs or other crucial settings in the other switches and you want it to manually set the PoE switch depending on the limitations you want for these PoE switches.

Use SNMP to monitor the power supply status of stacked switches

Does anybody know how to use SNMP to monitor the status of the internal power supplies of a group of stacked Cisco 3750 switches?
The switch stack has three 3750-48PS-E switches inter-connected by Cisco StackWise cable. IOS ver 12.1(19)EAlc. A single IP address is used to identify the switch stack. Every time I poll the OID chassisPs1Status (1.3.6.1.4.1.9.5.1.2.4.0 in CISCO-STACK-MIB), I only got the status for the Master switch of the switch stack. Is there any way to poll the power supply status of other switches in the switch stack?
Thanks a lot!

Sorry to refresh such an old topic - but I am stuck with exactly this: Monitoring power supplies of a stacked Cisco Catalyst 3750-E.
I'm using the exact same OID's as described, but the problem is, the information shown on the SNMP output is not correct.
This morning, a power supply of the first switch failed and switched to RPS. Here the information I got on SNMP:
snmpwalk -v 2c -c public 192.168.1.50 1.3.6.1.4.1.9.9.13.1
SNMPv2-SMI::enterprises.9.9.13.1.1.0 = INTEGER: 13
SNMPv2-SMI::enterprises.9.9.13.1.3.1.2.1006 = STRING: "SW#1, Sensor#1, GREEN "
SNMPv2-SMI::enterprises.9.9.13.1.3.1.2.2006 = STRING: "SW#2, Sensor#1, GREEN "
SNMPv2-SMI::enterprises.9.9.13.1.3.1.3.1006 = Gauge32: 41
SNMPv2-SMI::enterprises.9.9.13.1.3.1.3.2006 = Gauge32: 40
SNMPv2-SMI::enterprises.9.9.13.1.3.1.4.1006 = INTEGER: 59
SNMPv2-SMI::enterprises.9.9.13.1.3.1.4.2006 = INTEGER: 59
SNMPv2-SMI::enterprises.9.9.13.1.3.1.5.1006 = INTEGER: 0
SNMPv2-SMI::enterprises.9.9.13.1.3.1.5.2006 = INTEGER: 0
SNMPv2-SMI::enterprises.9.9.13.1.3.1.6.1006 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.3.1.6.2006 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.4.1.2.1060 = STRING: "Switch#1, Fan#1"
SNMPv2-SMI::enterprises.9.9.13.1.4.1.2.2059 = STRING: "Switch#2, Fan#1"
SNMPv2-SMI::enterprises.9.9.13.1.4.1.3.1060 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.4.1.3.2059 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.1059 = STRING: "Sw1, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.2060 = STRING: "Sw2, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.3.1059 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.3.2060 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.4.1059 = INTEGER: 2
SNMPv2-SMI::enterprises.9.9.13.1.5.1.4.2060 = INTEGER: 2
As you see, both PS1 (for both switches) are appearing normal. It doesn't even recognize RPS:
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.1059 = STRING: "Sw1, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.2060 = STRING: "Sw2, PS1 Normal, RPS NotExist"
The first switch's power supply died and now the cable is disconnected. LED's of the power supply are out. And still: The switch happily announces by SNMP it's power supplies are up.
Is this a known bug? If yes, has it been fixed?
Model WS-C3750E-48TD
Firmware 12.2(37)SE1
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Limiting Power Allocation to 4 W on Pre-POE Switch?

I'm using a Catlyst 3550 to supply power to a IP network surveliance camera. By default, the predecesor to POE, Cisco Inline Power allocates 15.4 W of power to a port ... Does anyone know the process for reducing this power output? Thank You
"For an IEEE device, the switch always allocates 15.4 W to the port. The switch does not display the IEEE class type in the show power inline privileged EXEC command output. Instead, it displays n/a."

Currently running: IOS Version 12.1(11)EA1, RELEASE SOFTWARE
Gregory Trikouros

AP connected to PoE switch is not coming up

Hi,
I have one ap-1131ag which is connected to PoE switch is not coming up , I tried to enable under interface mode to respective interface where AP is connected with below command :
" Power Inline enable " but still no luck , is there any thing i need to enable or check at switch side ? :
SW1#sh power inline
Module   Available     Used     Remaining
          (Watts)     (Watts)    (Watts)
1             n/a        n/a         n/a
2             n/a        n/a         n/a
Interface Admin Oper       Power   Device              Class Max
                            (Watts)
Gi2/0/1   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/2   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/3   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/4   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/5   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/6   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/7   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/8   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/9   auto   off        0.0     n/a                 n/a   30.0
Gi2/0/10 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/11 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/12 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/13 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/14 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/15 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/16 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/17 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/18 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/19 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/20 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/21 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/22 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/23 auto   off        0.0     n/a                 n/a   30.0
Gi2/0/24 auto   off        0.0     n/a                 n/a   30.0
please suggest me .

Hi,
I have confirmed that , the switch where we are trying to connect is PoE switch :
please see model details below :
we have cisco switch 3750 stacking over there with one non-PoE switch :
switch 1 provision ws-c3750x-48 : non-PoE switch
switch 2 provision ws-c3750x-48p : PoE switch
both the switches are stacked :
please refer below stack-power details as well :
Power stack name: Powerstack-1
    Stack mode: Power sharing
    Switch 1:
        Power budget: 206
        Low port priority value: 21
        High port priority value: 12
        Switch priority value: 3
        Port 1 status: Connected
        Port 2 status: Connected
        Neighbor on port 1: 503d.e58a.be80
        Neighbor on port 2: 503d.e58a.be80
    Switch 2:
        Power budget: 102
        Low port priority value: 22
        High port priority value: 13
        Switch priority value: 4
        Port 1 status: Connected
        Port 2 status: Connected
        Neighbor on port 1: 503d.e543.7380
        Neighbor on port 2: 503d.e543.7380
After connecting Poe devices ( 1131AG ap ) to the switch , we are getting below message :
Error Message    PLATFORM_STACKPOWER-4-UNDER_BUDGET: Switch 2 does not have
sufficient power budget
I tried to paste the same output in output interpreter but there is no workaround given for the same.
Please suggest me for the same.
In the mean time, i will get details which leolahoo has mentioned .

Can setting power output level at 65mw cause a one year old router to fail?

Recently my router WRT54GS v2.1 that is only one year old but has been in 24/7 service failed and the technician that worked on it said the failure was probably due to the power output level being set at 65mw and other firmware settings ( particulars available ) that had been used but were working fine to provide wireless service. The output was fed to a Smart Amp 500mw power amplifier with Automatic Gain Control then through 30 feet of 400 cable to an Omni-directional 14 dbi antenna. Coincidentally the power amp seemed to fail at the same time. The maximum input to the Smart Amp which has AGC is 23dBm (200mw) max. Is it possible that the firmware configuration and the 65mw setting were responsible for the failure of either or both devices?

If the ABS and Router/Modem are both giving IP Addresses out, (that's what tells everything on the Network where to send/get stuff to/from), then everything gets confused... a bit like trying to get US Mail delivered when your street has 2 names, and your abode has the same address as other houses on the block!
You just want the ABS to pass on the IP addies that the Router hands out, and not try to do it itself.
If your base station is connected to a router or other network device that is using NAT to share a single Internet connection with multiple computers on your network, and you are using DHCP to provide private IP addresses, you need to turn off NAT and DHCP on the AirPort base station.
Most networks need only one device using NAT and DHCP to provide IP addresses.
To turn off NAT and DHCP:
Open AirPort Admin Utility, select your base station, and click Configure.
Click Network and deselect the "Distribute IP addresses" checkbox.
If your base station supports Power over Ethernet (PoE), by default the "Distribute IP addresses" checkbox is not selected, and the base station is not using NAT or DHCP.
With NAT and DHCP turned off, the base station acts as a simple bridge between the wired and wireless computers on the network.

Anyone know how to monitor power used on USB Port?

I have an external quickertek usb wireless device that keeps shutting down my Macbook pro. It runs fine for a few days and then locks the entire system up. Quicktek made me a special device with an external power adapter thinking the problem was the USB port being asked for more power than it could deliver but the system is still crashing. I'd like to monitor my power output on that single USB port to see if the new device is really working properly but not sure how to measure power consumption on a usb.
Can anyone tell me if this is possible and if so how?
Thanks,
glenn

cybercrypt13 wrote:
thanks guys, I'm not sure how accurate the actual current power being used is as it seems to always say 500ma but I'll play around with it and see if I can get it to work for me.
glenn
Remember that 500 ma is the limit, so if a device attempts to draw more, it most likely will be current-limited at .5A.
At least it's a start.
This might also be useful:
http://developer.apple.com/documentation/HardwareDrivers/Conceptual/HWTechUSB/Articles/usbimplementation.html
And thanks
Message was edited by: nerowolfe

Power consumption for router and switch

I have a linksys EZSX88W switch which I checked power consumption of 70ma idle. It's supplied by the adapter which has an output of 1000ma. Not sure what the consumption when switch is being used. I also have an WRT54GS but haven't checked consumption yet, but it's powered by the same 1000ma adapter. In an effort to save energy-that -GREEN FEELING- I was thinking of using on power adapter to power bothe the router and switch. Has anyone tried this yet?? Also if I posted this in the wrong area I hope the moderator will move the post.
thanks

So you are thinking of Powering on both the Devices using a single Power Adapter? Well never tried to make both the devices use a single power adapter. As far as i think its not possible. But if you still wish, you can give a try and check if that works for you or not.

Cisco 1252s with regular 802.3af PoE switches - what are the impacts?

Does anyone have any real-life experience with deploying the 1252s on regular 802.3af PoE switches? I have a few 1252s one some 3560 PoE ports and the show up with "low power" alarms.
I am wondering what the real world impact is with this scenario. The 1252s have both 2.4 Ghz and 5.0 Ghz radios in them and I have HT enabled on the controller.
I'm wondering what capabilities I am losing by running on 802.3af power besides the annoyance of the alarms.
Thanks in advance!

Sorry in advance for the book I have just written.
I have three 1252s on 75 feet of Cat5e cable running to a 3560 PoE switch. Sometimes, but not always, I see a low power alarm on the access point(s). This is in a small building that is built like a fortress so the RF environment is somewhat challenging. I am watching WCS closely and see all three 2.4 GHz radios powered all the way up to power level 1. I notice that two of the 5GHz radios are on power level 1, and one is on level 3. I thought that RRM would not power anything down until you had at least four access points as RF neighbors. I believe I read that in a Ciscopress book and it seems to be true everywhere in our network when I look at buildings with 3 or less WAPs.
The building in question does not have any other buildings close by with any 5GHz radios in operation - or at least I didn't see any when I did the survey.
I'm wondering if the power setting of the radios is also related to the length of the Cat5e cabling. Seems to me a shorter run would have less resistance than longer runs, allowing the radio to have more power.
My main concern is not this building in question, since we went for coverage and not client density in the design. We several other buildings on the radar, all libraries, which are going to be both RF challenging (bookshelves, furniture, cubicles, cubbies) and client-density challenged. These buildings have hundreds of WLAN clients in them at times - and I mean devices, not just people.
Someone else told me (reputable source) that channel bonding is not an option when on 802.3af power. Makes sense, actually. I would never even think of bonding in the 2.4 GHz range for obvious reasons, but up in the 5GHz range it is a definate possibility in these buildings. Seems to be that we might be shooting ourselves in the foot by not using 802.3at power in these buildings.
If channel bonding is disabled and the upper two MCS rates (using 800ns guard interval) of 117 and 130 are disabled, then I'm looking at maximum MCS rate of 104 Mbit/s compared to 270 Mbit/s with 802.3at with channels bonded in the 5GHz range.

PoE for IP Phones and non PoE switches

Like everyone has already pointed out, a PoE device will need to be connected directly to a 802.3af compliant PoE switch. If you only have one jack for every workstation, then you will have to connect the phone to the wall/switch, and connect the computer to the phone. If you have separate data and voice vlans (like you should), 802.1q will need to be configured for the port as well.
PoE injectors are a great if you have them installed here and there, but if every port has one it will be a mess and PITA to work with since there will be double the Ethernet and as many power cords as you have injectors.
I stated 802.3af earlier because I've come across "PoE" devices (mainly from ubiquity) that still need an injector even though the switch is PoE.

I recently purchased a netgear PoE switch in order to power some IP phones we are going to implement into our office. The switch is with the router in our server room and I was wondering if power will continue through non poe switches. Each desk only has one ethernet port beside it and so in pretty much all our offices I have a 5 port switch so we can use multiple devices and printers and now these phones. Does anyone have any experience with PoE and dealing with non PoE switchs behind a PoE switch? much appreciated!
This topic first appeared in the Spiceworks Community

Xorg black screen after monitor power off, AMD r9 270X & aoc u2868pqu

Is there a way to get xorg to reset its video settings, and how are we getting more debug messages out of xorg these days?
(not any kind of emergency as everything is "working")
when I power off my monitor for a few minutes xorg goes completely black.
I can switch to other TTYs and start a second xorg from there
When I try to get back to the original TTY that xorg's still black.
these messages show up on the second TTY
<code>[34181.758006] [drm:si_dpm_set_power_state [radeon]] *ERROR* si_restrict_performance_levels_before_switch failed
[34181.835519] [drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[34181.835526] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
[34181.838937] [drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[34181.838942] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed</code>
nothing looks relevant in
~/.local/share/xorg/*
these messages also show up if I turn off the monitor when positioned on a console, but the console is still accessible on monitor power up.
none of these show up if I turn off the monitor when positioned on a KMScon, and the KMScon is still accessible on monitor power up.

Is there a way to get xorg to reset its video settings, and how are we getting more debug messages out of xorg these days?
(not any kind of emergency as everything is "working")
when I power off my monitor for a few minutes xorg goes completely black.
I can switch to other TTYs and start a second xorg from there
When I try to get back to the original TTY that xorg's still black.
these messages show up on the second TTY
<code>[34181.758006] [drm:si_dpm_set_power_state [radeon]] *ERROR* si_restrict_performance_levels_before_switch failed
[34181.835519] [drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[34181.835526] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
[34181.838937] [drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[34181.838942] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed</code>
nothing looks relevant in
~/.local/share/xorg/*
these messages also show up if I turn off the monitor when positioned on a console, but the console is still accessible on monitor power up.
none of these show up if I turn off the monitor when positioned on a KMScon, and the KMScon is still accessible on monitor power up.

Using Cisco 7961 Phones with Linksys SRW208P POE Switch

I am having a problem getting our Cisco 7961 phones to work with a Linksys SRW208P POE switch. The internet works great , but when I connect a 7961 Cisco phone it hangs at the " configuring IP " screen. Are these model phones compatible with this switch? Any Ideas. Thank You!

I'm having a similar problem with the Cisco 7941G phones using a Linksys SLM224G4PS (with PoE). Did you ever get them to work?
The 7941Gs work with the plain Linksys SR224 and using power injectors, but not with the smart switch. It has nothing to do with the PoE, I've used the power injectors with the SLM224G4PS. It wasn't a current overload problem.
I've gotten the phones to work for somewhere between 10-40 seconds, which has given me enough time to find the IP address (DHCP) then pull up the web interface of the Cisco 7941G.
The phone on the SR244 had GARP enabled and Voice VLAN enabled and the operation, the phone on the SLM224G4PS had both disabled.
The working phone on the SR244 had a operational VLAN ID of 31, the non working phone on the SLM224G4PS didn't have any indicated.
I'm guessing that the root of the problem is the Voice VLAN, but tech support tells me that out of the box the switch should pass everything.
Apparently not so much...

CISCO 3850 PoE+ SWITCHES

Hi,
I have a device which work on PoE (IEEE802.3af).
Is it possible to sent the data + power to the PoE device by use of Cisco PoE+ (IEEE802.3at) i.e Could PoE+ Switches (IEEE802.3at) support the PoE Devices (IEEE802.3af).
Please help.
Thanks
Amey

See this:
3850 PoE, PoE+, and Cisco UPOE Ports
The PoE+ and Cisco Universal Power Over Ethernet (Cisco UPOE) ports use the same connectors as described in the "10/100/1000 Ethernet Ports" section.
They provide:
•PoE+ ports: Support for IEEE 802.3af-compliant powered devices (up to 15.4 W PoE per port) and support for IEEE 802.3at-compliant powered devices (up to 30 W PoE+ per port). The maximum total PoE power in a 1RU switch is 1800 W.
•Cisco UPOE ports: Support for powered devices on all four Ethernet signal pairs (up to 60 W Cisco UPOE per port).
•Support for Cisco-enhanced PoE.
http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/hardware/installation/guide/HIGOVERV.html#wp1351798

Powering AP's via POE switch or injector

Hi,
Could anyone please advise if there is any difference in the power supplied to a 1142N AP when using a power injector (AIR-PWRINJ3/AIR-PWRINJ4) compared to using poe on the switch port (2960S 24 port POE switch WS-C2960S-24PS-L).
Thanks.

but someone once advised that in order to get full N potential from the AP's you need injectors.
Someone got their facts wrong.
If I was to get the full potential with N, I'd look to plug the WAP into a GigabitEthernet port. PoE or Injector won't make any difference.

Monitoring Power output on a POE switch

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