Cisco Switching/Routing :: 3750 - Power Stack Has Unbalanced Power Supplies
Jun 9, 2013
I am receiving the following error on 3750 stack switches. have already verified the power status and found ok.
IOS used: Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)
211540: Jun 10 10:45:17.935 UTC: %PLATFORM_STACKPOWER-4-UNBALANCED_PS: Switch 4's power stack has unbalanced power supplies
211541: Jun 10 10:46:18.045 UTC: %PLATFORM_STACKPOWER-4-UNBALANCED_PS:
[Code]....
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Mar 12, 2012
I have two WS-C3750X-48PF-S in stack, but every one has just one power supply. In the package of the switches is included one stack power supply cable.does it make sense to use stack power cable if every switch has just one power supply ??
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Sep 4, 2012
After stacking two 3750X switches, with four equal power-supply's, with StackWise and PowerStack , still got the next message every few hours %PLATFORM_ENV-1-FRU_PS_ACCESS: FRU Power Supply is not responding (gn4m-rt1p08-04-2)( note that the message revers to the second switch in the stack ) although the stackwise and powerstack on the switches is oke and are working correctly. !
Config : Stack-power in power-sharing mode/strict With CLI on the switch : All the power supply's and stack-power details, prio look OK.
Only: LMS prime /inventory/cisco-view/configure/power supply status result : some power supply's are marked as disabled.with the command > power supply 2 slot a off/on I manage to get the status back to "normal", but after a few hours some power supply's are again marked as "disabled".
Looks like SNMP en IOS difference from opinion.
Hardware
WS-C3750X-24S-S
C3KX-PWR-350WAC
Software
15.0(2)SE
C3750E-UNIVERSALK9-M
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Apr 21, 2013
What will be the recommended connectivity of stack power cable in 6 number of 3750x switches ?
Is it similar to the stack cable ?
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Jan 16, 2012
I have 4 switches in a 3750-X stack.Here is the output from the stack why are the switches out of order and I'm not able to bring up switch 1 port 1.
switch 4 port 2 shows not connect it is I've checked the cables.
Power stack name: Powerstack-4
Stack mode: Power sharing
Switch 1:
Power budget: 695
Low port priority value: 22
High port priority value: 13
Switch priority value: 4
Port 1 status: Shut
Port 2 status: Connected
Neighbor on port 1: 0000.0000.0000
Neighbor on port 2: c471.fe84.e100
Switch 2:
Power budget: 713
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: c471.fe85.3000
Neighbor on port 2: c471.fe80.2800
Switch 4:
Power budget: 697
Low port priority value: 19
High port priority value: 10
Switch priority value: 1
Port 1 status: Connected
Port 2 status: Not connected
Neighbor on port 1: c471.fe80.2800
Neighbor on port 2: 0000.0000.0000
Switch 3:
Power budget: 710
Low port priority value: 20
High port priority value: 11
Switch priority value: 2
Port 1 status: Connected
Port 2 status: Connected
Neighbor on port 1: c471.fe84.e100
Neighbor on port 2: c471.fe7f.eb00s
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Sep 12, 2012
Are the power supplies on these switches interchangeable? I know the model numbers are the same with the exception of the /2 at the end if it. Customer wants it to have a dual power supply but not sure if I need to order a secondary powere supply or just another powere supplu from a spare switch.
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May 14, 2012
I have 6500 core switch with 2500W power supply, and I want to install a second power supply with 3000W ? is this applicable ? if yes, is there a specific configuration that must be done ?
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Sep 19, 2012
If I'm upgrading dual redundant power supplies in a Catalyst 4507 from 1000W (data) to 1400W (data), can it be done without taking the switch through a power cycle? I'm guessing no as I read that the switch will not recognize a 1400W PSU in bay 2 if there is still an original 1000W PSU in bay 1.
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Jul 26, 2010
We just purchased a Nexus 7010 switch and we are at a stand still with our COLO trying to figure out what power source should be provided. APC recommends a 50amp 3phase vertical cabinet PDU (AP7867). What type of power sourcereakers will be sufficient in handling the Nexus 7k /w (3) power supplies? Do the COLO need to provide single phase or 3 phase power recepticals?
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Oct 31, 2012
I have 3 switches in my 3750 X stack. I am getting the following error in the logs: %PLATFORM_STACKPOWER-4-PRIO_CONFLICT: Switch 1's power stack has conflicting power priorities. Not sure what I should do next. Below is my Stack-power configuration:
Power stack name: Powerstack-1 Stack mode: Power sharing Stack topology: Ring Switch 1: Power budget: 735 Low port priority value: 20 High port priority value: 10 Switch priority value: 2 Port 1 status: Connected Port 2 status: Connected Neighbor on port 1: c464.1308.7900 Neighbor on port 2: e8b7.4827.e680
Switch 3: Power budget: 729 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: 2894.0fd9.9f00 Neighbor on port 2: 2894.0fd8.e200
Switch 2: Power budget: 690 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: 2894.0fd8.e200 Neighbor on port 2: c464.1308.7900
Each switch has its own 715W power supply in it and all check out OK.
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Jun 10, 2012
I have a switch stack with three WS-C3750X-48 switches running 12.2(55)SE. Recently, stack member 3 went offline for a few minutes, after being online for over a year. A show version on member 3 reports that the system returned to ROM by power-on.
Stack member 3 shares a UPS with a router that did not lose power and all three stack members have stack power with four 350 WATT power supplies between the three of them. There are no crashinfo files on any of the switches, log files show the stack ports on the other switches going offline then switch 3 being removed from the stack.
Surveillance recordings show there was no one near the switch during the time and AAA accounting shows no clues. Is it possible the switch crashed without leaving a trace in the logs, a crashinfo file and report that it returned to ROM by power-on?
I've read before that loose stack cables can cause stack member reboots. Would such an event generate log messages other than the stack ports changing states to down?
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Oct 26, 2011
Any issues are reported while configuring power stack ? We did several times with 12.2.58SE1 and SE2, sometimes the power stack is created automatically, sometimes needs to be configured manually. Looks like the behavior is not the same. Maybe it depends on the number/type of switches and number/type of power supplies.
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Oct 26, 2011
Does the color strips on C3750X stack power cables mean anything, I mean the green and yellow ones. On all Cisco pictures the green one seems to be plugged in the upper ports. I asked local Cisco representative, but he seems not to be sure. We tried to try different scenarios, and it looks like it does not matter what cable end we use. We do not have any external power supply, only interconnecting C3750Xs.
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Oct 28, 2012
We have 9 x 3750x switches with 5-nonPOE and 5-POE. There is a limitation with 4 POE per stack with Stack Power.
Can we combine all 9 to one stack since there are only 4 POE?
Or, is the 4-switch limitation applied regardless if they are mixed with POE and non-POE?
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Apr 14, 2013
We have two switches of the same model (WS-C3560-48PS-S) that are not providing PoE. I'm trying to remotely determine what the cause of the issue is.
Here is some output.
Hostname#show power inlineAvailable:0.0(w) Used:0.0(w) Remaining:0.0(w)
Interface Admin Oper Power Device Class Max (Watts)--------- ------ ---------- ------- ------------------- ----- ----Fa0/1 auto off 0.0 n/a n/a 15.4Fa0/2 auto off 0.0 n/a n/a 15.4Fa0/3 auto off 0.0 n/a n/a 15.4Fa0/4 auto off 0.0 n/a n/a 15.4Fa0/5 auto off 0.0 n/a n/a 15.4Fa0/6 auto off 0.0 n/a n/a 15.4Fa0/7 auto off 0.0 n/a n/a 15.4Fa0/8 auto off 0.0 n/a n/a 15.4Fa0/9 auto off 0.0 n/a n/a 15.4Fa0/10 auto off 0.0 n/a n/a 15.4(code)
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Feb 28, 2011
I have a 6500 chassis with 2 power supplies. At the moment I am using the default configuration:
power-redudancy mode redundant
The problem is that an inserted module is in "power deny" state due too insufficient power.
I know, that It's not a good idea to change into combined mode (loss of redundancy), but my customers requested this anyway.
So I will change to combined mode. So here's the 1 million dollar question: "Which modules will go into power deny, if one of my power supplies fails?"
The 6500 config guide states:
"Power supply is removed withredundancy disabled
• System log and syslog messages are generated.
• System power is decreased to the power capability of one supply.
• If there is not enough power for all previously powered-up modules, some modulesare powered down and marked as power-deny in the show power oper state field."
Well, do you know if there's any way to configure some kind of priority? E.g. I definetly don't want by 10Gig Module or WiSM module to be in power deny. Can i statically make sure, those module will be powered on for sure? Like: "power enable module slot_number" How is this calculated? Or is random?
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Apr 4, 2012
In a stand alone 3750x switch configuration, can the secondary power supply only act as a redundant power supply (active/standby), or can it become a "pool" of power similar to power sharing mode for StackPower (somewhat active/active)? I understand there is no stack involved here but I'm curious if this functionality is possible.
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Oct 31, 2012
I recently bought a bunch of cisco 3750-x switches. I configured them all and started deploying them. A day later, some of the switches started failing on me. When I connect the power cord to the AC main, the power supply module on the back shows "AC OK" LED Green but the "PS OK" LED shows Red. I started referring to the installation guide and it told me that "PS OK" LED turns RED when output has failed. Guessing this I checked with another power supply module that was working, but still I get the same LED indicators.The original power supply module works with other switches.IOS crash...?
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Jun 9, 2011
I am running a 4507 with the Power Supples PWR-C45-2800ACV. url...
Can I plug this power supply into this UPS unit? url...
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Feb 10, 2010
I have a 6509-E with redundant 3000W power supplies (WS-CAC-3000W) but one supply is current non-operational.From the outputs I'm not sure whether the issue is (more likely to be) with the supply to the PSU or the PSU itself, i.e. whether my first action should be to get an electrian to check the supply or fault call the PSU with our maintenance providers and have it replaced?
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Oct 22, 2012
I am connecting power cable (series power cables) on 3750 stacks. i have connected them the same way the stack cables are connected i.e. fo rexample on a stack with 3 3750s:
1- fitst slot on fist switch connected the second slot last switch in the stack.
2- second slot/ port on the first switch to the first on second and seoncd on teh second switch to first on the third switch.
this how they are alway been stacked.Now, I need to connect power cables and I have followed the same method for stacks up to 4 switches. it seems that if a stack has more tham 4 switches, then the cabling will be dofferent!?I was wondering what will be on the cabling scheme for stacks more than 4 switches.
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Dec 3, 2011
power supply problem...?Switch cisco WS-C3750-24P is showing "Unavail" from sh env all.Switch3750#sh env all FAN is OK,TEMPERATURE is OK,SW PID,Serial# Status Sys Pwr PoE Pwr Watts,Does it means that power supply 1 was removed? failed?,Do you know about another command to see more details?
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May 14, 2012
I am new to this and have ran into some problems. I butilt up my router I was able from the rom> prompt to get my router to boot from SLOT0:xxxxx
Then I did the copy command copy slot0:xxxxxxx bootflash:xxxxxxxMy router starts up fine. I did all my configurations and did my copy run start when I was done. As this is what I do on my 3750s.
My router lost power and rebooted and I lost everything it did not boot up to my last configuration.How do I save my configurations when I am done ? How do I get it to boot from that configuration every time?
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May 20, 2013
I want to know how much minimum power required for swicth catalyst 3750.I want to know cause in my building place, the power in unstable so it make my switch corrupt/damage even i add power consistancy....
How much amount power to the ups and ups to switch?
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Dec 5, 2012
CISCO 3945 Routers - Are the 3945 Router power supplies load balanced by default? We are trying to determine if our switch/server rack at our remote location has maxed out it's power load requirements. I just need to know if the 3945 power supplies load balance by default or if the redundant power supply is ON but not really providing the router with power and is just there incase the other power supply fails .
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Jul 21, 2011
I keep getting alerts from our WCS stating that our 1252s are drawing low power. Now I am aware that they require enhanced PoE (up to 20W) but as we only have standard PoE in that building we purchased the 1252 series power injectors to go with them.
However, even with the correct power injectors the WCS still reports the draws low power error.
Is this a bug? Running WCS 7.0.172 at the moment.
Forgot to say we are using the PWR-INJ4 and the injector status is enabled and you see the injector MAC address when you drill in to the AP status.
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Aug 23, 2011
I have a stack of five 3750X's connected in a single stack with the stackwise cables. Within this one stack, I created two power stacks, one power stack has 3 switches and the other has two switches. In each of the separate power stacks, one power stack port on a switch shows "shut", so the power stacks are not operating in a full ring. Is there a way to do a "no shut" on those stacks ports that are shut? IOS is 12.2(55)SE1
Here is the configuration -
stack-power stack XXX
stack-power stack YYY
!
stack-power switch 1
stack XXX
stack-power switch 2
[code]...
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Dec 5, 2012
how can I enable an automatic power-on after a power failure on an ASA 5512-X?
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Mar 3, 2013
how can I enable an automatic power-on after a power failure on an ASA 5512-X?
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Sep 4, 2012
I got some specs here that I can't seem to match with any existing switch - unless the 350CG-8PC-S can be powered by PoE.Let me quickly put down the important specs.
8x Gigabit ports
2x 1G Copper or 1G SFP Uplinks (It'll be a 1x Copper and 1x SFP setup)
support for PoE passthrough ( so just capable of it, provided it's 2x Copper Uplinks )
Does that match the 350CG-8PC-S ?
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Jul 22, 2012
Have Cisco catalyst 2960 IOS ver12.2(53)se2 when power on the power LED does not come up and on this is what shown on hyper terminal. what need to be done for this switch ?
Boot Sector Filesystem (bs) installed, fsid: 2
Base ethernet MAC Address: b4:d9:8d:27:4c:00
Xmodem file system is available.
[code]......
Interrupt within 5 seconds to abort boot process. Boot process failed. The system is unable to boot automatically. The BOOT environment variable needs to be set to a boot able image.
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Mar 21, 2013
I am building a switch stack using 4 48 port 3750X switches that will also have the power stacked. If I install a single 715W power supply in each switch will the stack support 802.3af accross all 48 ports on each switch? My calculations are 48 ports x 15.4W which gives me almost 740W needed which is over hte 715W power supply. I was reading somewhere were it mentioned that in a powerstack additional power can be drawn from the stack. I know this will not work if you are trying to support power on all switches accross all ports but would it if say 2 of the 4 switches are needing to provide PoE accross all 48 ports? If I say we can only use 24 ports per switch for PoE that drops the power need down to 370W which I believe should work. Just trying to get a better understanding of PoE consumption. Would the best solution be to just add a second power supply to each switch?
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Sep 28, 2012
I have a small business SD208p P.O.E switch that will not power a 7960 VoIP phone over P.O.E. It currently is powering a 7965 VoIP phone and a WiFI access point. what's wrong? I have tried several different VoIP phone's & port combo's.
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