Tuesday, February 16, 2016

Other Technical: Pinging With Different Packet Sizes

Sometimes its important to do a quick test to verify jumbo frames are able to pass through the network path you need it to.  If you are the network guy, and a server guy comes to you saying they are having problems with jumbo frames, YOU need to be able to test the network yourself to see if it works.  You can change the size of the packet with a ping to verify this.
Here is a normal ping:
C:\Users\switch>ping 10.10.10.10

Pinging 10.10.10.10 with 32 bytes of data:
Reply from 10.10.10.10: bytes=32 time=20ms TTL=55
Reply from 10.10.10.10: bytes=32 time=34ms TTL=55
Reply from 10.10.10.10: bytes=32 time=25ms TTL=55
Reply from 10.10.10.10: bytes=32 time=29ms TTL=55

Ping statistics for 10.10.10.10:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 20ms, Maximum = 34ms, Average = 27ms


Now, here is a ping using a larger size for jumbo frame testing:
C:\Users\switch>ping -l 9000 10.10.10.10

Pinging 10.10.10.10 with 9000 bytes of data:
Reply from 10.10.10.10: bytes=9000 time=23ms TTL=55
Reply from 10.10.10.10: bytes=9000 time=39ms TTL=55
Reply from 10.10.10.10: bytes=9000 time=24ms TTL=55
Reply from 10.10.10.10: bytes=9000 time=24ms TTL=55

Ping statistics for 10.10.10.10:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 23ms, Maximum = 39ms, Average = 27ms

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