Date: Sat, 03 Mar 2007 09:50:43 +0800 From: John Mok <jmok@attglobal.net> To: freebsd-ipfw@freebsd.org Subject: Dummynet cascade of pipes Message-ID: <45E8D473.5090808@attglobal.net>
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Hi, I am new to Dummynet. I would like to setup a FreeBSD QoS box to replace the one using Linux IMQ. However, I have the following questions :- 1. Is it possible to cascade pipes, such that the bandwidth management could be easier by hierarchical control rather than flat-out? For instance, pipe 100 is the total bandwidth 2Mbps of the serial link to Internet pipe 110 cascade pipe 100 with a weight 8Kbps and ceiling 16 Kbps pipe 120 cascade pipe 100 with a weight 32Kbps and ceiling 256 Kbps pipe 130 cascade pipe 100 with a weight 384Kbps and ceiling 2Mbps pipe 140 cascade pipe 100 with a weight 224Kbps and ceiling 2Mbps Pipe 130 and pipe 140 are allowed to consume the total bandwidth if there is no other traffic, but would only get its share 224 / (8 + 32 + 384 + 224) when all pipes are fully loaded. 2. Is there any FIFO queue rather WFQ? If there are 3 queues defined top sahre the bandwidth of pipe 110, how to make the traffic to go in FIFO manner? Thanks a lot. John Mok
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