![]() ![]() ICMPv4 is specified in RFC 792: and extended in RFC 4884. The IPv4 Time to Live field and functionality is described in the Internet Protocol RFC 791. A routing loop simply can’t be addressed at this level. Most likely it will retransmit more quicky than if it had not (no waiting for an acknowledgement first, it knows the packet has not arrived). Even if the ICMP message does arrive, there is no easy way for the host to handle the error and take an appropriate course of action. If the cause of the TTL expiring is a routing loop, this will likely exacerbate the problem. ICMP messages are frequently blocked or rate limited at various points in a network for perceived security benefits and if that occurs, the source will retransmit the discarded packet(s) a number of times.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |