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Using several pipes in ipfw (dummynet)

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Operating Systems BSD Using several pipes in ipfw (dummynet)
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Old 01-22-2009
Using several pipes in ipfw (dummynet)


I've already posted this on the freebsd-questions mailing list, but I thought I could try it here too.

I'm using FreeBSD 7.0 with IPFW DUMMYNET enabled.

I've got a problem with creating a ruleset, which allows me to limit the overall bandwidth of a link and afterwards pass the packets to another pipe for processing.

So far I've got those rules:




$cmd add 10 allow all from any to any via lo0

$cmd pipe 100 config mask src-ip 0xffffffff bw $upload_bandwidth queue $queue_size delay $delay
$cmd pipe 200 config mask dst-ip 0xffffffff bw $download_bandwidth queue $queue_size

$cmd add pipe 100 all from $client1_subnet to $server_subnet in via $in_if
$cmd add pipe 200 all from $server_subnet to $client1_subnet out via $in_if

$cmd add pipe 100 all from $client2_subnet to $server_subnet in via $in_if
$cmd add pipe 200 all from $server_subnet to $client2_subnet out via $in_if

$cmd add 10000 allow all from any to any via $management_if
$cmd add 20000 allow all from any to any via $in_if
$cmd add 30000 allow all from any to any via $out_if

What I want to add now, is the possibility to limit the bandwidth of the whole link, e.g. 100Mbit/s on em0.

I've tried to add a pipe:

$cmd pipe 50 config bw 100Mbit/s queue $queue_size
$cmd add pipe 50 all from any to any via $in_if

But when I have a look at the pipes with 'ipfw show' I can only see packets go through pipe 50 and nothing goes through the other pipes (which makes sense actually since IPFW works that way?).

Any help is much appreciated.


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