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New Member

input errors on a span destination port


i get a strange error, i get "input errors" on the span destination port. In this port is connected another switch, so is normal that's some input packets (stp, mcast, bcast, cdp ...) but why "input errors".

here is the output of the "sh int "

GigabitEthernet3/46 is up, line protocol is down (monitoring)

Hardware is C6k 1000Mb 802.3, address is 001b.d50e.3bdd (bia 001b.d50e.3bdd)

Description: Vers_sondes

MTU 1500 bytes, BW 100000 Kbit, DLY 10 usec,

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

Encapsulation ARPA, loopback not set

Full-duplex, 100Mb/s

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

Clock mode is auto

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

Last input never, output never, output hang never

Last clearing of "show interface" counters 3d00h

Input queue: 0/2000/156680/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 437000 bits/sec, 178 packets/sec

156680 packets input, 10027520 bytes, 0 no buffer

Received 130567 broadcasts (130567 multicast)

0 runts, 0 giants, 0 throttles

156680 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 0 multicast, 0 pause input

0 input packets with dribble condition detected

36431728 packets output, 11384576396 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


Re: input errors on a span destination port

This can occur when a port connected to a sever or other heavily used device receives too much data from other switch ports. When this occurs the data will be dropped and re-transmission can occur.

Issue the show port [mod/port] command in order to verify that the speed/duplex settings are same on both end of the connected interface.

Issue the show port jumbo command in order to check that the MTU settings, if any, are configured in that device.

New Member

Re: input errors on a span destination port


altually it's due to the hardware difference of the line cards and supervisors.

it's just a cosmetic problem


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