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Hi I wanted to know what the Ethernet II Protocol number for an ICMP echo request and also for a ICMP echo reply?

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2 Answers 2

ICMP is an IP protocol not an Ethernet Protocol. It's protocol number is 1, for the rest see the IANA assignments document.

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Just to add a little bit, echo-request is ICMP Type 8 and echo-reply is ICMP type 0 –  Zypher Feb 9 '10 at 22:45
    
Sounds more like a little byte to me ;) –  einstiien Feb 9 '10 at 22:50
    
@Zypher nicely clarified. –  Helvick Feb 9 '10 at 23:17
    
In addition, the ICMP code number returned with the type can be invaluable in troubleshooting: en.wikipedia.org/wiki/Internet_Control_Message_Protocol –  joeqwerty Feb 10 '10 at 3:39

The Ethernet protocol number would be 0800, as for any IP frame.

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