06-06-2019 10:40 AM
Good day. I have a Cisco 3650 48 port switch that is acting strange. POE seemed to jump around at first, but now after pulling the switch from the closet and testing it with a single cisco phone I am realizing an issue with the switch detecting the correct port and I was curious if anyone else has seen this before. I plugged a cisco phone into port g1/0/1 and I am watching the logs as it comes up. It detects the incorrect port at first and then changes the correct port state to up... Any port I plug into seems to do this allows power to the incorrect interface
After plugging phone into port g1/0/1 look below:
*Jun 6 16:06:16.401: %ILPOWER-7-DETECT: Interface Gi1/0/3: Power Device detected: IEEE PD
*Jun 6 16:06:17.401: %ILPOWER-5-POWER_GRANTED: Interface Gi1/0/3: Power granted
*Jun 6 16:06:25.992: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
*Jun 6 16:06:26.992: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
HOWEVER.., If you look at the int status & the power inline stats you can see that power appears to be applied to g1/0/3 with nothing actually plugged into that interface. During the interface status we are showing the correct interface connected.
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 on 15.4 Ieee PD 3 30.0
Gi1/0/4 auto off 0.0 n/a n/a 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
Switch#sh int status
Port Name Status Vlan Duplex Speed Type
Gi1/0/1 connected 1 a-full a-1000 10/100/1000BaseTX
Gi1/0/2 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/3 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/4 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/5 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/6 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/7 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/8 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/9 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/10 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/11 notconnect 1 auto auto 10/100/1000BaseTX
Any suggestions? I'm about to contact TACS but I figured I'd check the blogs first.
06-07-2019 01:28 AM
Hi Dave,
that sounds very weird. Which IOS version do you use? Have you tried different versions?
Best regards,
Johannes
06-07-2019 07:36 AM
06-07-2019 01:44 AM
Seen a similar issue. Software release may not match but do the Symptom/Conditions/Workaround match?
06-07-2019 07:39 AM
06-09-2019 12:47 AM
07-31-2019 10:28 AM
Test came back normal:
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/5 1000M
Pair A 5 +/- 10 meters N/A Normal
Pair B 5 +/- 10 meters N/A Normal
Pair C 7 +/- 10 meters N/A Normal
Pair D 5 +/- 10 meters N/A Normal
After further testing; plugging a phone into port 1 causes g1/0/3 to grant power (as well as g1/0/1). Plugging into g1/0/5 gives me a message that g1/0/7 has PD Removed and then power device detected when no device is plugged into that port. Here is a readout of me unplugging and plugging in g1/0/5 for example.
Switch#
*Jul 31 17:27:17.358: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/7: PD removed
*Jul 31 17:27:17.360: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi1/0/7: PD removed
*Jul 31 17:27:17.489: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to down
*Jul 31 17:27:17.993: %ILPOWER-7-DETECT: Interface Gi1/0/7: Power Device detected: IEEE PD
*Jul 31 17:27:18.371: %ILPOWER-5-POWER_GRANTED: Interface Gi1/0/7: Power granted
*Jul 31 17:27:18.491: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to down
*Jul 31 17:27:25.963: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to up
*Jul 31 17:27:26.963: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to up
08-01-2019 12:13 AM
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