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FAQ-Why Packets of Over 14716 Bytes Cannot Be Pinged on the NE40

Publication Date:  2012-07-27 Views:  37 Downloads:  0
Issue Description

Q:

Why packets of over 14716 bytes cannot be pinged on the NE40? 

      
Alarm Information

Null

      
Handling Process

A:

The test is as follows (10.110.156.149 is the interface address of the NE40):
C:\Documents and Settings\m93881>ping -l 14716 10.110.156.149
Pinging 10.110.156.149 with 14716 bytes of data:
Reply from 10.110.156.149: bytes=14716 time<1ms TTL=128
Reply from 10.110.156.149: bytes=14716 time<1ms TTL=128
Reply from 10.110.156.149: bytes=14716 time<1ms TTL=128
Reply from 10.110.156.149: bytes=14716 time<1ms TTL=128
Ping statistics for 10.110.156.149:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:\Documents and Settings\m93881>ping -l 14717 10.110.156.149
Pinging 10.110.156.149 with 14717 bytes of data:
Request timed out
Request timed out
Request timed out
Request timed out
Ping statistics for 10.110.156.149:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
C:\Documents and Settings\m93881>

The DMU of NP of the NE40 can receive packets of less than 14716 bytes. The NP does not process ICMP packets of more than 14716 bytes. 

      
Root Cause

Null

      
Suggestions

Null

END