On 05/30/2016 10:03 PM, Randy Bush wrote: > rfc1812 says > > 4.3.2.4 ICMP Message Source Address > > Except where this document specifies otherwise, the IP source address > in an ICMP message originated by the router MUST be one of the IP > addresses associated with the physical interface over which the ICMP > message is transmitted. If the interface has no IP addresses > associated with it, the router's router-id (see Section [5.2.5]) is > used instead. > > some folk have interpreted this to mean that, if a router R has three > interfaces > > .-----------------. > | | > | B |--------- D > S ---------| A R | > | C |--------- (toward S) > | | > `-----------------' > > of course, simpletons such as i would desire the source of the time > exceeded message to be A. after all, this is the interface to which i > sent the icmp with the TTL to expire.
Do you mean the source address or the source interface? I'm not sure if you mean that, if sent through C it should have the source addres of A, or that it should actually be sent through A regardless of the routing table (which sounds better to me). Octavio.
