Date: 25 Jun 2003 15:59:54 +0200 From: "clemens fischer" <ino-qc@spotteswoode.de.eu.org> To: "Andy Coates" <andy@bribed.net> Cc: freebsd-ipfw@freebsd.org Subject: Re: ipfw bandwidth shaping problems (intermittent latency) Message-ID: <znk65kbp.fsf@ID-23066.news.dfncis.de> In-Reply-To: <20030625102801.GM84062@andy.btvs.net> (Andy Coates's message of "Wed, 25 Jun 2003 11:28:01 %2B0100") References: <20030625094802.GK84062@andy.btvs.net> <20030625102801.GM84062@andy.btvs.net>
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* Andy Coates: > 64 bytes from x.x.x.x: icmp_seq=0 ttl=248 time=70.803 ms > 64 bytes from x.x.x.x: icmp_seq=1 ttl=248 time=3.850 ms > 64 bytes from x.x.x.x: icmp_seq=2 ttl=248 time=3.551 ms > 64 bytes from x.x.x.x: icmp_seq=3 ttl=248 time=123.844 ms what type of network-card do you have installed? some people claim that this can be an issue with the card, although i don't believe this having tried a couple. PING (some external host): 56 data bytes 64 bytes from x1.x2.x3.x4: icmp_seq=0 ttl=246 time=74.959 ms 64 bytes from x1.x2.x3.x4: icmp_seq=1 ttl=246 time=69.179 ms 64 bytes from x1.x2.x3.x4: icmp_seq=2 ttl=246 time=68.582 ms 64 bytes from x1.x2.x3.x4: icmp_seq=3 ttl=246 time=70.825 ms 64 bytes from x1.x2.x3.x4: icmp_seq=4 ttl=246 time=69.149 ms 64 bytes from x1.x2.x3.x4: icmp_seq=5 ttl=246 time=68.967 ms 64 bytes from x1.x2.x3.x4: icmp_seq=6 ttl=246 time=67.849 ms 64 bytes from x1.x2.x3.x4: icmp_seq=7 ttl=246 time=69.080 ms 64 bytes from x1.x2.x3.x4: icmp_seq=8 ttl=246 time=68.407 ms 64 bytes from x1.x2.x3.x4: icmp_seq=9 ttl=246 time=67.727 ms 64 bytes from x1.x2.x3.x4: icmp_seq=10 ttl=246 time=69.813 ms 64 bytes from x1.x2.x3.x4: icmp_seq=11 ttl=246 time=70.237 ms 64 bytes from x1.x2.x3.x4: icmp_seq=12 ttl=246 time=70.484 ms 64 bytes from x1.x2.x3.x4: icmp_seq=13 ttl=246 time=68.549 ms 64 bytes from x1.x2.x3.x4: icmp_seq=14 ttl=246 time=70.120 ms 64 bytes from x1.x2.x3.x4: icmp_seq=15 ttl=246 time=69.537 ms 64 bytes from x1.x2.x3.x4: icmp_seq=16 ttl=246 time=1075.376 ms 64 bytes from x1.x2.x3.x4: icmp_seq=17 ttl=246 time=75.057 ms 64 bytes from x1.x2.x3.x4: icmp_seq=18 ttl=246 time=1076.529 ms 64 bytes from x1.x2.x3.x4: icmp_seq=19 ttl=246 time=74.996 ms 64 bytes from x1.x2.x3.x4: icmp_seq=20 ttl=246 time=69.312 ms 64 bytes from x1.x2.x3.x4: icmp_seq=21 ttl=246 time=70.170 ms 64 bytes from x1.x2.x3.x4: icmp_seq=22 ttl=246 time=71.475 ms 64 bytes from x1.x2.x3.x4: icmp_seq=23 ttl=246 time=69.761 ms 64 bytes from x1.x2.x3.x4: icmp_seq=24 ttl=246 time=67.868 ms i don't use any type of pipes/queues, and have been noticing this "phenomenon" for years without any god explanation. there's not much traffic into or out of this workstation, no bursts correlating with these delays. this is on A-DSL line. my firewall rules changed considerably over time, but not these numbers. the quoted delays appear on every tenth packet on average. clemens
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