Cisco switch 2960 - 7port - POE issue

mfouad.jahmi · ‎11-13-2011

hi,

when am trying to plug a PC into the switch, it takes power as the switch is POE . but when trying to plug IP Camera Device it does not take any power.

although i have cisco 2960 - 24 ports both PC and IP Camera getting power. while troublshooting by #show power inline , i get nothing as well.

dwtc-edge2960-7-1st#show power inline

GigabitEthernet GigabitEthernet IEEE 802.3z

consumption Show inline power consumption

| Output modifiers

<cr>

dwtc-edge2960-7-1st#show power inline consumption

Interface Consumption Admin

Configured Consumption (Watts)

dwtc-edge2960-7-1st#show power inline consumption

Available:0.0(w) Used:0.0(w) Remaining:0.0(w)

Interface Admin Oper Power Device Class Max

(Watts)

--------- ------ ---------- ------- ------------------- ----- ----

any advice !!?

Regards,

MJ

jimmysands73_2 · ‎11-13-2011

First question:

>>when am trying to plug a PC into the switch, it takes power as the switch is POE .

How does your PC get power? I dont understand why a PC needs POE.

Second:

Your port configs doesnt have it turned POE do they?

From http://www.cisco.com/en/US/products/hw/switches/ps4324/products_configuration_example09186a0080722cdb.shtml

Switch(config-if)# power inline auto

auto Automatically detect and power inline devices

Make sure that yuou are using a known working POE device when testing. Also try a nonPOE device to make sure the port atleast becomes up/up.

Third:

When you do debug while plugging in a capable POE device what does it say?

Handy docs:

Troubleshooting Power over Ethernet (PoE)

(diff platform, same exact principle)

http://www.cisco.com/en/US/products/hw/switches/ps4324/products_configuration_example09186a0080722cdb.shtml

Message was edited by: Jimmy Sands More reference Configuration Note for Catalyst 2960 Switch Power over Ethernet Ports, Rel. 12.2(44)SE http://www.cisco.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_44_se/configuration/note/ol14988.html

Leo Laohoo · ‎11-13-2011

Can you please post the complete output for the command "sh version"?

mfouad.jahmi · ‎11-14-2011

jimmy,

i followed your advice but i cant Use the power inline interface configuration command to configure the power management mode on the Power over Ethernet (PoE) ports.

when am trying to allocate power inline under the interface, am not able to get the following commands :

#power inline {auto [max max-wattage] | never | static [max max-wattage]}

or

#logging event power-inline-status

Is that due a software version which not supported those commands ?

leo,

pls look at the sh ver output >>>

dwtc-edge2960-7-1st#show version

Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Compiled Fri 26-Mar-10 09:14 by prod_rel_team

Image text-base: 0x00003000, data-base: 0x01400000

ROM: Bootstrap program is C2960 boot loader

BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(35r)SE2, RELEASE SOFTWARE (fc1)

dwtc-edge2960-7-1st uptime is 14 minutes

System returned to ROM by power-on

System image file is "flash:c2960-lanbasek9-mz.122-50.SE4/c2960-lanbasek9-mz.122-50.SE4.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

cisco WS-C2960G-8TC-L (PowerPC405) processor (revision C0) with 65536K bytes of memory.

Processor board ID FOC1504W3BW

Last reset from power-on

2 Virtual Ethernet interfaces

8 Gigabit Ethernet interfaces

The password-recovery mechanism is enabled.

64K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address : 44:E4:D9:62:67:00

Motherboard assembly number : 73-10613-08

Power supply part number : 341-0208-02

Motherboard serial number : FOC15031MKT

Power supply serial number : LIT15010964

Model revision number : C0

Motherboard revision number : B0

Model number : WS-C2960G-8TC-L

System serial number : FOC1504W3BW

Top Assembly Part Number : 800-28133-02

Top Assembly Revision Number : E0

Version ID : V02

CLEI Code Number : COM7S00ARB

Hardware Board Revision Number : 0x01

Switch Ports Model SW Version SW Image

------ ----- ----- ---------- ----------

* 1 8 WS-C2960G-8TC-L 12.2(50)SE4 C2960-LANBASEK9-M

Configuration register is 0xF

Regards,

MJ

Vitor Afonso Strabello · ‎11-14-2011

Hi Mohamad, how are you doing?

What is the model for the 24-port 2960? Seems like the the model you sent the sh ver (WS-C2960G-8TC-L) doesn't support PoE. As I found in this link. Look at table 14:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/product_data_sheet0900aecd80322c0c.html

Also you can see a comparision between 2960 models on this URL:

http://www.cisco.com/en/US/products/ps6406/prod_models_comparison.html

Regards,

Vitor

mfouad.jahmi · ‎11-14-2011

Vitor,

thanks for you assitance, your post were really useful to me.

the switch model is WS-C2960G-8TC-L which is Cisco Catalyst 2960-8TC-L.

i tracked the link attached and found that there is no POE mentioned .

does this mean the switch not supported POE ?

Regards

Leo Laohoo · ‎11-14-2011

Model number                    : WS-C2960G-8TC-L

That's not a PoE switch. It won't support PoE.

You have but three choices:

1. If an 8-port PoE switch is what you need then consider the WS-C3560-8PC; or

2. Get power injectors for the power devices; or

3. Get a mid-span switch.