1, regarding the ICMP error message does not produce the ICMP error message

2, the destination address is the broadcast address or IP datagram multicast address

3, is not the first piece of IP fragmentation

4, the source address is not a single IP datagram
Why want to ask next more than a few cases it does not produce the ICMP error report? Thank you!

CodePudding user response:

1. Itself is wrong if it should have been an error errors package infinite loop
2. If the broadcast and multicast is produced, received all the machine will return together icmp packets to source
3. If it is, in view of the IP fragmentation of all pieces that would have quite a lot of errors in the bag, really don't have to
4. The source address is not a single address are generally counterfeit package
All together is afraid of too much feedback bandwidth and processing power, and the feedback really don't have to, these problems are easy to forge the address against the data packet guide,