Track CRC error on 3550/3560 FE interface

From: C Chan (cch.ccie@gmail.com)
Date: Mon Mar 10 2008 - 12:59:42 ARST


Hi all experts,

I am using cisco 3550 and 3560 switches.
If I want to implement a proactive monitoring by examining the CRC error
counter of any FE interface, how can I do that?

The only solution I think is to use "rmon alarm" and "rmon event' to issue a
log statement in syslog server and notify the NOC duty staff.
But, *how do I get the correct OID (eg ifEntry.x.x) of this object?* There
are too many MIB objects. I am not sure how to search.

Regards,
CH

SW_3560#s int fa0/1
FastEthernet0/1 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0017.94c0.5981 (bia 0017.94c0.5981)
  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 00:00:34, 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)
  1 minute input rate 33000 bits/sec, 53 packets/sec
  1 minute output rate 41000 bits/sec, 61 packets/sec
     3721716809 packets input, 3349318567 bytes, 0 no buffer
     Received 966426 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 89 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 526916 multicast, 0 pause input
     0 input packets with dribble condition detected
     101994607 packets output, 2082354208 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



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