Date: Wed, 25 Jun 2003 10:48:02 +0100 From: Andy Coates <andy@bribed.net> To: freebsd-ipfw@freebsd.org Subject: ipfw bandwidth shaping problems (intermittent latency) Message-ID: <20030625094802.GK84062@andy.btvs.net>
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Hi, Up until now I've been fairly happy with just using a simple pipe with: pipe 1 config bw 2400Kbit/s However recently under a more utilised link we start to see every third packet or so have a higher latency than the rest. For example, an icmp ping to the host would show 10ms, 10ms, and then 190ms, then back to 10ms for another 2 pings and upto 190ms again. I decided to play with the queue settings, and tried: pipe 1 config bw 2400Kbit/s queue 15 This then brought that third ping down to 70ms, so an improvement. This still isn't acceptable however, since the amount of bandwidth being used is only 1000Kbit/s so I can't see where the problem is. Is there anything else I can change to improve the response/latency? Or is this some type of bug? Thanks in advance. Andy.
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