cisco 2960-xr POE not providing power for my non-cisco IP Phone

timothy_MTS · ‎03-06-2023

Hello all,

Recently there is a problem on one of the ports on my c2960XR switch. The port was plugged with an IP Phone. Suddenly from last week, it stopped working. I found out that the cable is fine. Tried to plug in the external power supply then it works. I tested with a POE testing. In the far end as well as in front of the switch with this tester, it doesn't show the port provides any POE.

I tested with another port on the same switch, it works fine. It means the POE tester shows OK. The IP phone patched to this port, it also works running.

Now I have a testing IP Phone connected to this port (gi1/0/19) directly to the switch. It is off. I checked some statistics on the switch. It doesn't show any clear fault. Any idea?

asw02#show env all
FAN PS-1 is OK
FAN PS-2 is OK
SYSTEM TEMPERATURE is OK
System Temperature Value: 34 Degree Celsius
System Temperature State: GREEN
Yellow Threshold : 67 Degree Celsius
Red Threshold : 75 Degree Celsius
POWER SUPPLY 1A TEMPERATURE: OK
POWER SUPPLY 1B TEMPERATURE: OK

asw02#sh env power all
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1A PWR-C2-1025WAC DCB2050C07J OK Good Good 250/775
1B PWR-C2-1025WAC DCB2052C2CX OK Good Good 250/775
2A PWR-C2-1025WAC DCB2052C2DU OK Good Good 250/775
2B PWR-C2-1025WAC DCB2050C07H OK Good Good 250/775

asw02#sh power inline module 1

Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
1 740.0 52.0 688.0
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/1 auto off 0.0 n/a n/a 30.0
Gi1/0/2 auto off 0.0 n/a n/a 30.0
Gi1/0/3 auto off 0.0 n/a n/a 30.0
Gi1/0/4 auto on 26.0 AIR-AP2802I-Z-K9 4 30.0
Gi1/0/5 auto off 0.0 n/a n/a 30.0
Gi1/0/6 auto off 0.0 n/a n/a 30.0
Gi1/0/7 auto off 0.0 n/a n/a 30.0
Gi1/0/8 auto off 0.0 n/a n/a 30.0
Gi1/0/9 auto off 0.0 n/a n/a 30.0
Gi1/0/10 auto off 0.0 n/a n/a 30.0
Gi1/0/11 auto off 0.0 n/a n/a 30.0
Gi1/0/12 auto off 0.0 n/a n/a 30.0
Gi1/0/13 auto off 0.0 n/a n/a 30.0
Gi1/0/14 auto off 0.0 n/a n/a 30.0
Gi1/0/15 auto off 0.0 n/a n/a 30.0
Gi1/0/16 auto off 0.0 n/a n/a 30.0
Gi1/0/17 auto off 0.0 n/a n/a 30.0
Gi1/0/18 auto off 0.0 n/a n/a 30.0
Gi1/0/19 auto off 0.0 n/a n/a 30.0
Gi1/0/20 auto off 0.0 n/a n/a 30.0
Gi1/0/21 auto off 0.0 n/a n/a 30.0
Gi1/0/22 auto off 0.0 n/a n/a 30.0
Gi1/0/23 auto off 0.0 n/a n/a 30.0
Gi1/0/24 auto off 0.0 n/a n/a 30.0
Gi1/0/25 auto off 0.0 n/a n/a 30.0
Gi1/0/26 auto off 0.0 n/a n/a 30.0
Gi1/0/27 auto off 0.0 n/a n/a 30.0
Gi1/0/28 auto off 0.0 n/a n/a 30.0
Gi1/0/29 auto off 0.0 n/a n/a 30.0
Gi1/0/30 auto off 0.0 n/a n/a 30.0
Gi1/0/31 auto off 0.0 n/a n/a 30.0
Gi1/0/32 auto off 0.0 n/a n/a 30.0
Gi1/0/33 auto off 0.0 n/a n/a 30.0
Gi1/0/34 auto off 0.0 n/a n/a 30.0
Gi1/0/35 auto off 0.0 n/a n/a 30.0
Gi1/0/36 auto on 26.0 AIR-AP2802I-Z-K9 4 30.0
Gi1/0/37 auto off 0.0 n/a n/a 30.0
Gi1/0/38 auto off 0.0 n/a n/a 30.0
Gi1/0/39 auto off 0.0 n/a n/a 30.0
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/40 auto off 0.0 n/a n/a 30.0
Gi1/0/41 auto off 0.0 n/a n/a 30.0
Gi1/0/42 auto off 0.0 n/a n/a 30.0
Gi1/0/43 auto off 0.0 n/a n/a 30.0
Gi1/0/44 auto off 0.0 n/a n/a 30.0
Gi1/0/45 auto off 0.0 n/a n/a 30.0
Gi1/0/46 auto off 0.0 n/a n/a 30.0
Gi1/0/47 auto off 0.0 n/a n/a 30.0
Gi1/0/48 auto off 0.0 n/a n/a 30.0

asw02#show interfaces gi1/0/19
GigabitEthernet1/0/19 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 2c86.d290.c413 (bia 2c86.d290.c413)
Description: available
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 2y41w, output 35w6d, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 41888354
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
85 packets input, 11505 bytes, 0 no buffer
Received 85 broadcasts (64 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 64 multicast, 0 pause input
0 input packets with dribble condition detected
14428161552 packets output, 13111811166839 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

asw02#sh ver
Cisco IOS Software, C2960X Software (C2960X-UNIVERSALK9-M), Version 15.2(5)E2, RELEASE SOFTWARE (fc4)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2017 by Cisco Systems, Inc.
Compiled Sun 30-Apr-17 22:08 by prod_rel_team

ROM: Bootstrap program is C2960X boot loader
BOOTLDR: C2960X Boot Loader (C2960X-HBOOT-M) Version 15.2(3r)E1, RELEASE SOFTWARE (fc1)

asw02 uptime is 5 years, 5 weeks, 5 days, 35 minutes
System returned to ROM by power-on
System restarted at 08:50:40 NZDT Sat Jan 27 2018
System image file is "flash:/c2960x-universalk9-mz.152-5.E2/c2960x-universalk9-mz.152-5.E2.bin"
Last reload reason: power-on

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
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cisco WS-C2960XR-48FPD-I (APM86XXX) processor (revision P0) with 524288K bytes of memory.
Processor board ID FDO2103B04Z
Last reset from power-on
2 Virtual Ethernet interfaces
1 FastEthernet interface
400 Gigabit Ethernet interfaces
16 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 2C:86:D2:90:C4:00
Motherboard assembly number : 73-100633-04
Power supply part number : 341-0533-02
Motherboard serial number : {omitted}
Power supply serial number : {omitted}
Model revision number : P0
Motherboard revision number : A0
Model number : WS-C2960XR-48FPD-I
Daughterboard assembly number : 73-14200-03
Daughterboard serial number : {omitted}
System serial number : {omitted}
Top Assembly Part Number : 68-100319-02
Top Assembly Revision Number : A0
Version ID : V06
CLEI Code Number : {omitted}
Daughterboard revision number : A0
Hardware Board Revision Number : 0x22

Leo Laohoo · ‎03-06-2023

@timothy_MTS wrote:
Last input 2y41w

Whatever is connected to that port is dead. The last time the switch saw any traffic coming out of the downstream client was almost 3 years ago.

Must've caught COVID and did not survive.

timothy_MTS · ‎03-06-2023

Good spot. Nah... That's not the case. The port itself is working fine on the network connections. I plugged in the laptop to that port and it works fine. So this is port with POE is not functioning.

Cheers,

Timothy

balaji.bandi · ‎03-06-2023

is the issue only with gi 1/0/19? can you try connecting to another port - is the phone work? or are none of the ports not getting PoE?

as @Leo Laohoo was suggesting since it was long uptime of the switch, have you get a chance to cold boot and test it.

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timothy_MTS · ‎03-06-2023

Yes. It could be a course of actions to do. I noticed that in the same switch,

For the ports 1-12 it works fine, it should be fine. In port 4, we have an AP running.

From the ports 13-24, which is where I experienced now, are having problems.I tried port 19 and 23, no POE at all.

For the ports 25-36, it should work fine. In port 36, we got another AP running.

For the ports 37-48, we tested but not working as well.

It looks like the problem happened on different module.

Cheers,

Timothy

Leo Laohoo · ‎03-06-2023

Plug the phone to a different port on the switch and do a TDR:

Command: test cable tdr interface <PORT>
Wait for about 5 to 7 seconds.
Command: sh cable tdr interface <PORT>
Post the complete output to #3.

timothy_MTS · ‎03-06-2023

Hi Leo,

This port works fine. Same cable, same IP Phone.

asw02#show cable tdr int gi4/0/29
TDR test last run on: March 07 14:39:10

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi4/0/29 1000M Pair A 34 +/- 10 meters Pair B Normal
Pair B 34 +/- 10 meters Pair A Normal
Pair C 34 +/- 10 meters Pair D Normal
Pair D 34 +/- 10 meters Pair C Normal

This port doesn't work. Same cable, same IP Phone.
asw02#show cable tdr int gi1/0/18
TDR test last run on: March 07 14:43:55

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/18 auto Pair A 2 +/- 10 meters N/A Open
Pair B 3 +/- 10 meters N/A Open
Pair C 2 +/- 10 meters N/A Open
Pair D 2 +/- 10 meters N/A Open

Cheers,

Timothy

Leo Laohoo · ‎03-06-2023

Cold reboot switch 1.

After the reboot, if the problem persist, post the complete output to the command "sh post".

timothy_MTS · ‎03-09-2023

Will arrange a schedule to cold reboot this but not at the near future I can see. Need to get approval. Cheers,

Timothy