Hello,
One of the interfaces of a 3650 switch is going in an up/down state. It happens about 7-8 times a day.
This interface is fastethernet ,the other end of this interface has a device connected which seems to have 1G capability(to what we know). Below are the error & other outputs for this switch/port.
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/12, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/12, changed state to down
%LINK-3-UPDOWN: Interface FastEthernet0/12, changed state to down
%LINK-3-UPDOWN: Interface FastEthernet0/12, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/12, changed state to up
interface FastEthernet0/12
switchport mode access 1
no cdp enable
spanning-tree portfast
FastEthernet0/12 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0017.e460.805b (bia 0017.e460.805b)
MTU 1500 bytes, BW 100000 Kbit, 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 00:00:06, output 00:00:00, output hang never
Last clearing of "show interface" counters 07:02:55
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 1000 bits/sec, 2 packets/sec
5 minute output rate 16000 bits/sec, 5 packets/sec
119760 packets input, 24863782 bytes, 0 no buffer
Received 32243 broadcasts (0 multicast)
6 runts, 0 giants, 0 throttles
7 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1611 multicast, 0 pause input
0 input packets with dribble condition detected
188172 packets output, 67660430 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
Transmit FastEthernet0/3 Receive
2702787991 Bytes 4137165453 Bytes
64804583 Unicast frames 48150228 Unicast frames
4081262 Multicast frames 659485 Multicast frames
83025247 Broadcast frames 3978992 Broadcast frames
0 Too old frames 3696174848 Unicast bytes
0 Deferred frames 116097607 Multicast bytes
0 MTU exceeded frames 324839550 Broadcast bytes
0 1 collision frames 0 Alignment errors
0 2 collision frames 0 FCS errors
0 3 collision frames 0 Oversize frames
0 4 collision frames 828 Undersize frames
0 5 collision frames 0 Collision fragments
0 6 collision frames
0 7 collision frames 31093062 Minimum size frames
0 8 collision frames 9229742 65 to 127 byte frames
0 9 collision frames 6661202 128 to 255 byte frames
0 10 collision frames 2998387 256 to 511 byte frames
0 11 collision frames 944255 512 to 1023 byte frames
0 12 collision frames 1862058 1024 to 1518 byte frames
0 13 collision frames 0 Overrun frames
0 14 collision frames 0 Pause frames
0 15 collision frames
0 Excessive collisions 1 Symbol error frames
0 Late collisions 0 Invalid frames, too large
0 VLAN discard frames 0 Valid frames, too large
0 Excess defer frames 0 Invalid frames, too small
72108073 64 byte frames 828 Valid frames, too small
34615452 127 byte frames
10227836 255 byte frames 0 Too old frames
4440648 511 byte frames 0 Valid oversize frames
1696645 1023 byte frames 0 System FCS error frames
28822438 1518 byte frames 0 RxPortFifoFull drop frame
0 Too large frames
0 Good (1 coll) frames
0 Good (>1 coll) frames
Also, following is seen when interface error counters are checked.
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize
Fa0/10 0 0 0 2 0
Fa0/11 0 0 0 1 0
Fa0/12 0 0 0 7 12
Fa0/13 0 0 0 0 0
Will setting this fa0/12 to 100/full help here? What is the possible reason for flaps & err/runt on interface.
Appreciate all help please. Thank you.
