We're having some very aggravating PoE issues with 2960S switches powering primarily Bosch video surveillance cameras. We'll have several cameras connected to a WS-C2960S-48FPS-L switch or a stack of them, and all will come up and work correctly. At some later time, one or more of the cameras will lose connection while the others continue to function. Moving the dead camera to another port on the same switch doesn't work, neither does swapping the patch cable, doing a shut/no shut on the interface, setting power inline static/auto on the port, etc.
However, that same camera _will_ power back up when we bring a spare 2960S switch in to the IDF, using all the same patch cables & cable run out to the installed location.
We're definitely not coming anywhere near overruning the power budget on these switches.
On one of the problematic devices, I do see the following in the logs when I admin the power down then back up:
Jan 9 09:10:29.401: %LINK-5-CHANGED: Interface GigabitEthernet1/0/24, changed state to administratively down
Jan 9 09:10:39.678: %SYS-5-CONFIG_I: Configured from console by admin on vty0 (10.32.100.250)
Jan 9 09:10:39.804: %ILPOWER-7-DETECT: Interface Gi1/0/24: Power Device detected: IEEE PD
Jan 9 09:10:40.527: %ILPOWER-5-POWER_GRANTED: Interface Gi1/0/24: Power granted
Jan 9 09:10:40.726: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/24, changed state to down
Jan 9 09:10:45.676: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/24, changed state to up
Jan 9 09:10:46.677: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/24, changed state to up
Jan 9 09:10:49.839: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/24, changed state to down
Jan 9 09:10:50.840: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/24, changed state to down
The switch thinks it's still providing power to that port:
as05-sbmdf#show power inline gig1/0/24
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/24 auto on 15.4 Ieee PD 0 30.0
Interface AdminPowerMax AdminConsumption
(Watts) (Watts)
---------- --------------- --------------------
Gi1/0/24 30.0 15.4
But the link never comes back up:
as05-sbmdf#sh int gig1/0/24
GigabitEthernet1/0/24 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is b4e9.b0ea.9998 (bia b4e9.b0ea.9998)
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 239/255, 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 never, output 00:00:07, output hang never
Last clearing of "show interface" counters 00:04:53
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
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
0 packets input, 38194 bytes, 0 no buffer
Received 0 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
145 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
8 packets output, 2627 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
as05-sbmdf#
Config for all those ports is pretty minimal:
as05-sbmdf# sh run int gig1/0/24
Building configuration...
Current configuration : 91 bytes
!
interface GigabitEthernet1/0/24
switchport access vlan 329
spanning-tree portfast
end
as05-sbmdf#
We've tried working with Bosch, but they don't have much useful to offer. The really infuriating thing is that these same cameras will come up when connected to a spare switch, but never when connected to the original switch they were on when they initially began to fail.
I did try opening a TAC case on this, but while our 2960S are still covered under their one year warranty for hardware, Cisco won't let me open a support case on them without adding them to one of our support contracts.
