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One of the ME60 port have the CRC count and growing more and more ( packets loss when ping the direct port)

Publication Date:  2014-11-21 Views:  262 Downloads:  0

Issue Description

【 Problem Summary 】 One of the ME60 port have the CRC count and growing more and more ( packets loss when ping the direct port)

Handling Process

1. Check the port count, found the CRC of port growing more and more . CRC: 1610154 packets;

2. Ping the IP address of direct port in ME60, found the packets loss;

3. The possibility of port CRC :1) The optical module have the problem in any of equipment side; 2)There is link or transmission problem between the equipment.

4.The customers said they have conformed there is no problem between the equipment transmission, please checking the local ME60 whether have the problem;

5.Apply the business interruption for this port during the operation windows. And then doing the loopback ping test.

Base on the test, the ping is ok and confirmed that there is no problem on local ME60 side.
Detail procedure as follows:

1) config Loopback local on the port;
2) cancel the icmp fast reply; ( under the system view, input 'Undo icmp-reply fast')
3) config static ARP.  The address is the local IP address of this port.

Arp static 0018-0000-e30a
[ME60]display arp int gi 6/0/1
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,               0018-0000-e30a                       I -                 GE6 and 0/1
4) ping testi, confirm whether can be or not;
Ping -a (the ip of interface) - i (interface) (the ip of interface) 
ping -a -i GigabitEthernet 6/0/1

Root Cause

There is no problem with ME60 optical module and must have the problem in the link or transmission.


【 Resolution Summary 】 Check the link and opposite equipment.
【 Resolution Details 】 Analysis: based on the loopback ping testing results, the local interface of ME60 do not have any problem, Please Check the link and opposite equipment.