ipfw pipe show output - clarification needed please
- From: Arone Silimantia <aronesimi@xxxxxxxxx>
- Date: Sat, 27 Jan 2007 09:24:42 -0800 (PST)
I set up a dummynet pipe with this sequence of commands:
sysctl -w net.inet.ip.fw.one_pass=0
ipfw pipe 1 config bw 16Mbit/s
ipfw add 10000 pipe 1 all from any to any
So far so good. Works great. However, when I look at the pipe itself, with this command:
ipfw pipe show 1
I see this:
# ipfw pipe show 1
00001: 16.000 Mbit/s 0 ms 50 sl. 1 queues (1 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp
0 tcp 220.127.116.11/22 18.104.22.168/4333 2970975653 2649647615805 2 2992 10414733
I would like to clarify a few things...
First, the ipfw pipe creation command I ran is not (as far as I can tell) TCP specific, and further, my ipfw rule says "any to any" - but when I look at the pipe, it has a protocol specified (TCP) and further, has a port number (22). I want to throttle ALL IP traffic, not just TCP, and certainly not just port 22.
What am I doing wrong ?
Second, there are seven headings (from BKT at the left to Drp on the right) but underneath those seven headings are _9_ values. What I really want to know is how many packets I am droppinig ... but I can't tell which of the fields are the "dropped" - I assume it is the final number .. if so, what is that measured in ? Packets ?
Finally, why am I dropping any packets ? My total traffic is 5-7 Mbits/s on average ... I don't see why I would be dropping any packets at all ... are they being dropped because the system can't keep up, or are they being dropped because I am hitting the throttle limit and it drops everything above that ?
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