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Network latency and ping drops

Publication Date:  2012-07-27 Views:  2 Downloads:  0
Issue Description
Quidway S8512 Software Version V100R006B01D028SP05
VRP (R) software, Version 5.30 (NE40E&80E V300R002C06B325)
NE80E G12/0/0 --- G2/0/0 NE40E G5/0/0.2 --- G0/1/1 S8512
Alarm Information
Null
Handling Process
The following error was showing up with the ping failure:
wrong data byte #1538 should be 0xfa but was 0x2
Root Cause
Host connected to the S8512 had very high latency accessing the internet and had also ping drops when the packet size was larger than 188 bytes from S8512 to NE80E
<SAN_JUAN_S8512_MCN_N1>ping -s 2000 -c 100 10.80.2.61
 
PING 10.80.0.11: 2000  data bytes, press CTRL_C to break
Request time out
Reply from 10.80.0.11: bytes=2000 Sequence=2 ttl=253 time=1 ms
wrong data byte #1538 should be 0xfa but was 0x2
Request time out
Reply from 10.80.0.11: bytes=2000 Sequence=4 ttl=253 time=1 ms
Suggestions
The issue was in the link between the NE80E --- NE40E
It caused by NP chip of slot 2 LPU (in the NE40E), this NP chip works abnormal. After we restart this NP chip,it is works.
It is cuased by software of Micro Engine works abnormally.
It is a infrequent behavior. It is impossible to happen again.The probability that happen again is very low 
<Quidway>sys
   [Quidway]_d
   [Quidway_d]efu me slot 2 egress restart all-me

END