Cisco Switch Log

[IrfanKhan4904]

Cisco Switch Model is cisco WS-C3750G-24PS (PowerPC405).
Following is the log of this switch. So anybody helps me to understand this?

02:56:26: %ILPOWER-5-IEEE_DISCONNECT: Interface Gi3/0/21: PD removed
02:56:33: %ILPOWER-7-DETECT: Interface Gi3/0/21: Power Device detected: IEEE PD
02:56:33: %ILPOWER-5-POWER_GRANTED: Interface Gi3/0/21: Power granted
02:56:41: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/21, changed state to up
02:56:43: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/21, changed state to up
02:57:02: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/21, changed state to down
02:57:03: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/21, changed state to down
02:57:06: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/21, changed state to up
02:57:08: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/21, changed state to up
03:05:09: %HARDWARE-2-THERMAL_WARNING: Temperature has reached warning threshold
03:09:36: %ILPOWER-7-DETECT: Interface Gi3/0/15: Power Device detected: IEEE PD
03:09:36: %ILPOWER-5-POWER_GRANTED: Interface Gi3/0/15: Power granted
03:09:41: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/15, changed state to up
03:09:43: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/15, changed state to up
03:10:02: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/15, changed state to down
03:10:03: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/15, changed state to down
03:10:06: %LINK-3-UPDOWN: Interface GigabitEthernet3/0/15, changed state to up

[marce1000]

 - The devices connected at the subsequent interface(s) may experience problems and or are going up and down.

 M.

[Leo Laohoo]

Post the complete output to the command "sh interface G3/0/15 controll".

NOTE:  Do not post screenshots.

[IrfanKhan4904]

show interfaces gigabitEthernet3/0/15 GigabitEthernet3/0/15 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is 0026.5266.1e8f (bia 0026.5266.1e8f) Description: ****DORM-E1**** MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, 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 00:00:00, 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) 30 second input rate 82000 bits/sec, 73 packets/sec 30 second output rate 1116000 bits/sec, 200 packets/sec 10094306 packets input, 3435942248 bytes, 0 no buffer Received 94893 broadcasts (0 multicast) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 82912 multicast, 17969 pause input 0 input packets with dribble condition detected 36324787 packets output, 3082363060 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 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

[Leo Laohoo]

What are those PED?

[balaji.bandi]

%HARDWARE-2-THERMAL_WARNING: Temperature has reached warning threshold

if you worried about this logs, look at below explanation and required further information what is the device connected along with controller information.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_37_se/system/message/smg/msg_desc.html