[c-nsp] atm oam ping ok but ping ip not ok

[Andhy Indarto]

Dear all,

I have experience with ATM interface that when I do atm oam ping the
result is normal but when I do ping ip then the result is bad and have a
lot of packet loss.

This is the reslt of atm oam ping :

Sending 500, 53-byte end-to-end OAM echoes, timeout is 2 seconds:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Success rate is 100 percent (500/500), round-trip min/avg/max = 4/6/16
ms

 

And this is the result of ping ip :

Sending 100, 100-byte ICMP Echos to 10.149.3.97, timeout is 2 seconds:

..!!..!!!.!!!..!...!!!.!!!!.!.!!!!.!!...!...!..!!!..!!!.!!!.!!..!!....

..!..!!..!!!.!.!!!...!!..!..!!

Success rate is 53 percent (53/100), round-trip min/avg/max = 4/4/8 ms

I am new with atm and I have to troubleshoot inter-city link using ATM,
what is the cause of L2 ping ok but L3 ping is bad ? What is the
troubleshooting scenario that I should do to verify and find the root
cause ?

Thanks

andhi




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