Date: Thu, 23 Jan 1997 13:31:54 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: rg@gds.de Cc: freebsd-isp@freebsd.org Subject: Re: Ping DUP Message-ID: <199701231231.NAA21897@labinfo.iet.unipi.it> In-Reply-To: <199701231229.NAA20550@gds.de> from "Richard Gresek" at Jan 23, 97 01:28:00 pm
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> route add 194.231.79.60 localhost > > Now, when I ping this address from another network every ip-packet > get duplicated: > > PING 194.231.79.60 (194.231.79.60): 56 data bytes > 64 bytes from 194.231.79.60: icmp_seq=0 ttl=251 time=59.921 ms > 64 bytes from 194.231.79.60: icmp_seq=0 ttl=251 time=69.929 ms (DUP!) > 64 bytes from 194.231.79.60: icmp_seq=1 ttl=251 time=60.104 ms > 64 bytes from 194.231.79.60: icmp_seq=1 ttl=251 time=70.113 ms (DUP!) > 64 bytes from 194.231.79.60: icmp_seq=2 ttl=251 time=60.108 ms > 64 bytes from 194.231.79.60: icmp_seq=2 ttl=251 time=70.071 ms (DUP!) > 64 bytes from 194.231.79.60: icmp_seq=3 ttl=251 time=50.142 ms > 64 bytes from 194.231.79.60: icmp_seq=3 ttl=251 time=60.133 ms (DUP!) > ^C --- > 194.231.79.60 ping statistics --- 4 packets transmitted, 4 packets > received, +4 duplicates, 0% packet loss round-trip min/avg/max = > 50.142/62.565/70.113 ms # > > There are no DUPs when pinging from within the same net. > > I did not have this problem with FreeBSD 2.1.5 nor with 3.0 and a > NE2000 clone. > > Could it be a bug in the vx0 driver or did I misconfigure something? most likely you have two paths to/from your host, and either the ping request or the response are duplicated. It i also interesting to note the 10ms difference between the dups -- although I cannot tell where this difference comes from! Luigi -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________
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