On Wed, Mar 5, 2008 at 11:24 AM, Scott Brim <[EMAIL PROTECTED]> wrote: > Propagating TTL expired for encapsulated packets is an interesting > thought. I'll have to learn more about what other protocols do.
Scott, Implementations generating an ICMP error message like destination unreachable are only required to return the IP header and the first 8 bytes of the layer 4 header. That won't include any knowledge about the encapsulated packet. Most modern implementations seem to return as much of the dead packet as will fit in to 512 bytes. This includes enough of the encapsulated packet for the ITR to reflect the unreachable back to the originating host. Regards, Bill Herrin -- William D. Herrin [EMAIL PROTECTED] [EMAIL PROTECTED] 3005 Crane Dr. Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
