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New Member


I've been monitoring the 2 switchs WS-C3550-48-SMI

over the last couple weeks. Although there are no logs that give evidence, it appears there is something not quite right with these switches. From a monitoring tool that I have I can see interface resets on the Gigabit uplink port for some time now. There is a line under performance summary that states the number of state changes since midnight last night. I do not see this on the interface statistics (under carrier resets) but I have been notified of some complaints about poor performance on these switches. I can see the links are not overloaded so there must be a good explanation somewhere else up to and including something not related to the network

Please suggest me on the same



Hall of Fame Super Bronze

Re: WS-C3550-48-SMI ERROS


Can you please provide the output you are seeing?

Perhaps you are experiencing duplex-mismatch in the configuration between the switch and another device or faulty cable.



New Member

Re: WS-C3550-48-SMI ERROS


Thanks very much for reply

output is below

GigabitEthernet0/1 is up, line protocol is up (connected)

Hardware is Gigabit Ethernet, address is 000e.38e4.5c31 (bia 000e.38e4.5c31)

MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive not set

Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX

input flow-control is off, output flow-control is off

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, output 00:00:11, 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 273000 bits/sec, 462 packets/sec

5 minute output rate 4000 bits/sec, 4 packets/sec

34050999 packets input, 10981338 bytes, 0 no buffer

Received 30924958 broadcasts (0 multicasts)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 23671238 multicast, 0 pause input

0 input packets with dribble condition detected

3115507 packets output, 859866121 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

i have cheked there is no duplexmatch could you suggest me



Hall of Fame Super Bronze

Re: WS-C3550-48-SMI ERROS


Based on the output provided, I don't see anything wrong with the switchport. I'm unsure what mechanisms your NMS tool uses to determine health on the switch but this interface is in good shape.