I have a 2960 switch and every then and now the ports are flapping, while i was on console i saw ports going down and coming up...when the ping to machine ip addresses timed out the port status on switch was still up...no errors collisions seen on sw port. Below is sh int when the port was flapping
-2960-24-SW1#sh int fa 0/5
FastEthernet0/5 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is a418.7535.eb05 (bia a418.7535.eb05)
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 00:49:02
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 2000 bits/sec, 1 packets/sec
5 minute output rate 42000 bits/sec, 2 packets/sec
18683 packets input, 3593873 bytes, 0 no buffer
Received 297 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
33090 packets output, 8573689 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
here is the config from the port
interface FastEthernet0/5
switchport mode trunk
srr-queue bandwidth share 10 10 60 20
priority-queue out
mls qos trust cos
auto qos voip trust
spanning-tree portfast
end
Its setup as trunk although its going to a PC that is because we are going to deploy non Cisco Ip phones from third party..
anybody has any ideas..this is happeing with all of the ports every then and now
