Port down, POE showing applied to port

[andrew.mcmanus]

Hi,

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.

Thanks,

Andrew

[ebarticel]

If port goes down and then comes up after you enable it, it could be a port security issue, not relating to poe settings.

Check port security settings.

Hope this helps

Eugen

[andrew.mcmanus]

hi

No port security on this switch yet.

Thanks

Andrew

Sent from Cisco Technical Support iPhone App

[ebarticel]

How is your power inline configured? auto, static, never?

[andrew.mcmanus]

auto

Sent from Cisco Technical Support iPhone App

[ebarticel]

Did you try to set the power inline to static on a port?

Choose a port that will have an ip phone attached and shut it down, config "power inline static" with no value,( switch will automatically allocate 15.4W max) then open the port again.

Eugen

[ebarticel]

Also can you post the output of "show power inline consumption" and "show interface "

[andrew.mcmanus]

#sh power inline consumption
Interface  Consumption      Admin
           Configured    Consumption (Watts)
---------- -----------  -------------------

Fa0/17         NO                 0.0
Fa0/18         NO                 0.0
Fa0/19         NO                 0.0
Fa0/20         NO                 0.0
Fa0/21         NO                 0.0
Fa0/22         NO                 0.0
Fa0/23         NO                 0.0
Fa0/24         NO                 0.0

#sh power inline
Available:65.0(w)  Used:7.0(w)  Remaining:58.0(w)

Interface Admin  Oper       Power   Device              Class Max
                            (Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/17    auto   on         7.0     Ieee PD             2     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

FastEthernet0/17 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is f025.72cc.8b13 (bia f025.72cc.8b13)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  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 47000 bits/sec, 36 packets/sec
     23478 packets input, 4099586 bytes, 0 no buffer
     Received 13 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     6985367 packets output, 1274518081 bytes, 0 underruns

[ebarticel]

I see that you get power on Fa0/17. Do you have ip phones connected to other 7 ports? Is cdp enabled on those ports?

Are the ip phones Cisco? If they are not, you should set the power inline to static.

Eugen

[Leo Laohoo]

Sounds like an IOS bug to me.