Cisco Switching/Routing :: PoE Switch Ports Stops Supplying Power On Cat 4507e
Dec 11, 2011
i recently deployed cat4507e switch along with 3 nos of WS-X4748-RJ45V+E - 48 port gigabit PoE modules. I am using polycom IP560 phones.
I am facing issue of some switch ports (randomly) stops supplying power to phone at random time. So far there are about 4 incident and i have been plugging those connection to different - usused ports. I am planning to RESET the switch module during weekend and i think it might fix issues with those ports.
But what would be quick and easy way to fix this issue when the issue is faced? How/what to check on switch port interface wrt to power? If switch module is falling short of overall power requirement, is there a way to boost the power?
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Feb 26, 2012
Essentially, not all ports on our brand new SG300-28P switches provide Inline Power to our older 7900 series phones. I can connect the phone a couple ports down and it usually powers up, but not always. Often I can also connect an 802.3af device to one of the troublesome ports and it will received power, however I am noticing there are some ports that now refuse to supply PoE at all?
This is equipment that has been running perfectly fine for several years now, on C3524 PWR XL switches. I can also tell you that this is not isolated to one switch, but all 5 of our SG300 access switches. And, yes, the firmware has been updated to 1.1.2.0.
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Mar 26, 2012
I have a problem with x4648-rj45V+E module, which is not forwarding frames/packets in my 4507E switch. I have done the diagnostic and the module test is passed. When i try to ping from one PC to another in the flat network, icmp is not forwarding. Even i cannot see the mac addresses in the mac address-table. But i can ping to my management port in the sup module?
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Aug 30, 2012
Can 2 Cisco 4507E switches with redundant SUP6-E modules be connected togther using the the standard 10GB CX4 modules and CX4 copper cables? Are there any special modules or cables required.
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Feb 4, 2012
I have a situation where two of my CGS-2520-16S-8PC switches are not applying POE power to the copper ports, but showing power inline, two ports are showing power applied. Shutting down the port and re-enabling it will return the port to normal and the phone will connect.
I'm running cgs2520-lanbasek9-mz.122-58.EY2 after using 122-58-se1. Happening on both, but i have more switches running EY2 with no issues at the moment. Using DC power supply averaging around 53v.
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Jan 27, 2012
recently a Cisco 3560E switch went down due to a power surge. the switch is getting power but i am only seeing the below message continously. it is keep on rebooting. i try to reset to factory settings/ safe boot nothing worked. is there any way i can bring the switch up or it is hardware failure.Using driver version 1 for media type 2Base ethernet MAC Address: 00:23:33:af:1b:00Xmodem file system is available.The password-recovery mechanism is enabled.Using driver version 1 for media type 2Base ethernet MAC Address: 00:23:33:af:1b:00Xmodem file system is available.The password-recovery mechanism is enabled.
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May 31, 2012
we need to relocate our core switch 6500 with sup 720 to another bldg
what is the command to gracefully shut it down I mean power off
I was told one can just switch off the power
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Apr 28, 2012
We have Communication Media Module (WS-SVC-CMM) mounted on 6513 switch. It went down twice and we brought it up by applying "power enable module".
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Jun 1, 2012
Can a Cisco SG300-10P switch power a Cisco SG200-08 switch over POE? Or an SG200-08P power an SG200-08 via POE? I have an area where I'd like to put a small switch, but would like to avoid having to have electrical power run to it. Or will the SG300 and SG200 POE switches only power endpoint devices such as cameras and IP phones?
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May 19, 2012
I have a 6509 that has dual SUP32's.Just want to make sure and give a reason(if there is one). Slot 6 always becomes the active hot on a full reboot. Meaning from no power to the whole switch to powered on. What is the election process for Supervisors?
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Sep 26, 2011
I have an issue with a 3560 in my network, after sometimes it fails to give out power to some ip phones,while others are not affected and below is the message i get
"Power given, but Power Controller does not report Power Good"
output of sh power inline and sh env all : everything seems to be ok on the switch
#sh power inline
Available:450.0(w) Used:48.0(w) Remaining:402.0(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi0/1 auto off 0.0 n/a n/a 15.4
Gi0/2 auto off 0.0 n/a n/a 15.4
Gi0/3 auto off 0.0 n/a n/a 15.4
[code].....
It's solved by a reboot of the switch, i could have suspected a power environnment issue but it's the only equipement disturbing in the network.
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Nov 9, 2011
I like the SG-300 switches for SMB and I'd like use them in our network. Design is quite simple just 6 SG-300 switches connected to one central switch using SFP ports (using 2 port trunks) so I need 12 SFP ports and this is my question. Could you recomend me switch with more then 12 SFP ports from Cisco for this SMB network ? I don't know all the Cisco product lines and I can't find it.
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Mar 9, 2012
I have upgraded my C3560-PS-S switch to the latest IOS version 12(2)55-SE4 and it is not providing PoE anymore? It used to work before this upgrade? I searched Cisco bugtrack and there is bug defined for this IOS/Switch.
Switch(config-if)#do show power inline Available:370.0(w) Used:0.0(w) Remaining:370.0(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto off 0.0 n/a n/a 15.4
Fa0/3 auto off 0.0 n/a n/a 15.4
Fa0/4 auto off 0.0 n/a n/a 15.4
Fa0/5 auto off 0.0 n/a n/a 15.4
Fa0/6 auto off 0.0 n/a n/a 15.4
Fa0/7 auto off 0.0 n/a n/a 15.4
Fa0/8 auto off 0.0 n/a n/a 15.4
Fa0/9 auto off 0.0 n/a n/a 15.4
Fa0/10 auto off 0.0 n/a n/a 15.4
Fa0/11 auto off 0.0 n/a n/a 15.4
Fa0/12 auto off 0.0 n/a n/a 15.4
Fa0/13 auto off 0.0 n/a n/a 15.4
Fa0/14 auto off 0.0 n/a n/a 15.4
Fa0/15 auto off 0.0 n/a n/a 15.4
Fa0/16 auto off 0.0 n/a n/a 15.4
Fa0/17 auto off 0.0 n/a n/a 15.4
Fa0/18 auto off 0.0 n/a n/a 15.4
Fa0/19 auto off 0.0 n/a n/a 15.4
Fa0/20 auto off 0.0 n/a n/a 15.4
Fa0/21 auto off 0.0 n/a n/a 15.4
Fa0/22 auto off 0.0 n/a n/a 15.4
Fa0/23 auto off 0.0 n/a n/a 15.4
Fa0/24 auto off 0.0 n/a n/a 15.4
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Nov 13, 2011
We have one switch 4510R which could have total 300 cisco GE color phone connected. That means 300x15.4=4620W. Considering the 89% effiency for the PoE line cards, that means each line card needs 5191W input power from chasis power supply. Based on the 6000W power supply specs, only up to 4800W is allocated for PoE purpose. But we need 5191W from power supply which redundant mode can't offer. We don't want to go with combined mode. So should we add external power shelf to add more power?Another question will be how much power we need from utility or UPS. For example, the efficency of cisco power supply is 75% and we use two 6000W power supplies in redudant mode. Then we need 8000W. The voltage is 220V. Then the AMP we need is 36.4A from UPS or utility power.
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Apr 16, 2012
i have one of my switch modules that shows PwrDown when i issue the command show mod.
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 9 Supervisor Engine 32 8GE (Active) WS-SUP32-GE-3B SAD09120263
2 48 48 port 10/100/1000mb EtherModule WS-X6148-GE-TX SAL1029VWZ5
[Code]....
i tried disabling the diagnostic monitor for the module, did a power enable module command and then reset it but it still fails. this is the third blade that i am replacing in a few weeks and i still get the same error. i am persuded that it is not a hardware since it is the third blade in a matter of weeks. after the module reset, i receive this error % module 3 is operationally off (FRU-power failed)
could an ios upgrade solve this issue? are there any ios related bugs?
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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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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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Dec 8, 2012
I would like to check if it may be possible to hot-upgrade/swap the 4506E power supplies? Based on the configuration guide; I have summarized the steps as follows:
1. Switch has 2 existing power supplies to be upgraded
2. Remove right side/bay 2 power supply and install new power supply
3. At this point; the new power supply will be in err-disabled due to different power supplies on the switch
4. Remove the left side power supply and install new power supply
For item 4; during the removal of the old power supply in bay 1/left side and installation of the new power supply; I am wondering if the switch would lose power even though the new power supply is installed in bay 2?
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May 18, 2012
The following discussion is based on cisco cat 6500 switches with two power supplies: p1 and p2. . Both power supplies are running in combined mode .Each power supplies is rated with 500 watts max( I just picked 500 watts for simplicity)Combined mode In combined mode, each power supply provides approximately 83% of its capacity to the chassis. This allows for greater utilization of the power supplies and potentially increased PoE densities
1) Let say our specific 6500 switch's configuration requires 1000 watts. We have two power supplies p1 and p2 ,each with rated power of 500 watts. Both power supplies must operate in combined mode. Will power supplies be able to meet the total load power requirement of 1000 watts?
Here is my understanding :The maximum power delivered by each power supplies is 83 percent of its rated power, assuming power supplies are running in combined mode.
So Maximum power delivered by power supplies
= 83% of p1+ 83% of p2
= 83% of 500 + 83% of 500
= 415 +415
=830 watts
Thus the required load of 1000 watts can not be met by our power supplies in combined mode.
2 )Suppose our switch's switch configuration needs 500 watts. Again our power supplies each rated with 500 watts, are configured for combined mode. How much power is being delivered by each power supply? Is it 83 percent of the total load i.e 500 watts?
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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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May 10, 2012
My cisco 3550 EMI switch is not responding to power connection. I have checked and changed power cable. its still not working.fan is not running and no lights on front panel
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Nov 6, 2012
I have a 3750x 48port POE switch that I installed a second power supply in. But it doesnt power on. Am I supposed to enable it in the switch somewhere? I've plugged it into a couple different outlets so I know that's not the problem.
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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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Jul 13, 2012
The default Gateway and DHCP server is connected to port 1 of the switch. I have various other devices on the network plugged into other ports on the switch.I want port 1 to communicate with every port on the switch, but don't want the other ports to be able to see eachother unless I specifically allow them to. For example, port 5 should see port 1, and 7, but nothing else.Everything needs to be in the same subnet. With the older Dlink switches I am used to this feature is called "Port Segmentation" but I see no such option in this switch. I have been playing with the VLAN settings but so far I have not been able to achieve this.
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Feb 5, 2013
I have a statck of 4 2960s switches, with POE powered access points on 2 of them. All of the access points appear to be functioning normally. For some reason, on 3 interfaces connected to access points, I get the following when issuing show interfaces status:
Gi3/0/9 connected: T 7 a-full a-1000 10/100/1000BaseTX
^
My question is regarding the "T" in the status field. I can't find any documentation on this.
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Feb 20, 2013
I was viewing the 3560x switch datasheet and i need network module C3KX-NM-10G. I have dark fiber with over 12 km distance to i guess i will be needing SFP EX for single mode.
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Feb 19, 2013
My SG200-50P Switch Log appears as follows with Random ports going up and down. I am trying to find out if this links to another problem I'm having with a Client Server software locking up on the client end. The hardware, thin clients and desktops, are working and have checked all sleep and power settings. All items in working order, now I'm wondering about the switch
2147483369 2013-Feb-20 15:12:07 Warning %STP-W-PORTSTATUS: gi19: STP status Forwarding
2147483370 2013-Feb-20 15:12:02 Informational %LINK-I-Up: gi19
2147483371 2013-Feb-20 15:12:00 Warning %LINK-W-Down: gi19
2147483377 2013-Feb-20 14:51:31 Informational %LINK-I-Up: gi45
2147483378 2013-Feb-20 14:51:28 Warning %LINK-W-Down: gi45
[code]....
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Apr 7, 2012
After a power problem at our data centre we find Module 11 of our Cisco 6513 Core Switch in PWR Down state.Show Module 11 returns: Status: PWRDownShow Power Status Module 11 returns: OperStatus Off (Module Reset due to an exception or user request).The command:
Power enable Module 11 was issued and returned the following: %PM_SCP-SP-1-LCP_FW_ERR: System resetting module 11 to recover from error: Linecard received system exception. Errcode = 2509000001.%OIR-SP-3-PWRCYCLE: Card in module 11 is being powercycled Öff (Module reset due to exception or user request%C6KPWR-SP-4-DISABLED: Power to module in slot 11 set off (Module Reset due to exception or user request),We have restarted the switch twice. The module is currently not passing traffic causing downtime to services.
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Dec 7, 2011
I am facing switch reboot issue when power of switch restore from RPS to AC.
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Nov 28, 2012
We have a cisco catalyst 6509 with Supervisor Engine . After power outage, the switch always start in Rommon mode. Configuration register is 0X2102, we want to it always start in normal mode. What should i do?
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Dec 15, 2012
does the WS-C2960-24TT-L switch support power over Ethernet ?
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Jan 22, 2012
I've a 7206VXR (NPE-G1) router. I would like to purchase a PA-GE port adaptor where I've to use a GBIC connector.
1. Is it possible to have a connection between PA-GE and a 3560G switch (4 SFP ports)? If yes, what type of cables & connectors are to be used?
2. Is there any GigabitEthernet port adaptors / modules for 7206vxr where I can connect RJ45 (cat 5) or SFP modules?
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Feb 1, 2013
I have been reading the postings on this site trying to retrieve the MAC address for the client devices (computers, printers) attached to our switches. We have approximately 500 switches and I need to map the mac address to the switch. It appears the OID information is for SNMP v2. We are restricted to using only SNMP v3. I have tried using the Cisco SNMP Object Navigator without any success.
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