Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!anise!salt.acc.com!lars From: lars@salt.acc.com (Lars J Poulsen) Newsgroups: comp.protocols.tcp-ip Subject: Re: ICMP Multiple Echo Replies Keywords: ICMP echo reply Message-ID: <864@anise.acc.com> Date: 30 Jun 89 20:32:36 GMT References: <1131@umn-d-ub.D.UMN.EDU> Sender: news@anise.acc.com Organization: Advanced Computer Communications, Santa Barbara, California Lines: 23 In article <1131@umn-d-ub.D.UMN.EDU> tperala@umn-d-ub.D.UMN.EDU (Tim Perala) writes: >1% /etc/ping multimax.encore.com >PING multimax.encore.com: 56 data bytes ... >64 bytes from 129.91.1.14: icmp_seq=3. time=213. ms >64 bytes from 129.91.1.14: icmp_seq=3. time=220. ms ... >64 bytes from 129.91.1.14: icmp_seq=8. time=284. ms >64 bytes from 129.91.1.14: icmp_seq=8. time=289. ms >Notice that I receive multiple replies on some of the requests. >I have no reason to believe that my ping program is in error. >What are some possible explanations for this behaviour, aside >from the obvious, that the recipient of the request is actually >generating multiple replies from a single ICMP echo request? Somehow, two copies of an ICMP request made it to the host in question. Are there redundant routes ? Could two datagrams have been forwarded by two different gateways out of your LAN ? / Lars Poulsen (800) 222-7308 or (805) 963-9431 ext 358 ACC Customer Service Affiliation stated for identification only My employer probably would not agree if he knew what I said !!