ipfw bandwidth shaping

From: Bikrant Neupane (bikrant_ml_at_wlink.com.np)
Date: 07/15/04

  • Next message: Mikolaj Rydzewski: "Re: php accelerators" 
    To: freebsd-isp@freebsd.org
Date: Thu, 15 Jul 2004 10:36:29 +0545

    Hi I am using freebsd 4.9 with ipfw to shape b/w for my broadband clients.
    I have created a 64Kbit pipe and I have configured few ips to use the pipe. ie
    more than one client share the same 64Kbit pipe.

    I have been montoring the b/w utilization by using the command:
    ipfw pipe show $inpipe | tail -1 | awk '{ print $6 }
    ipfw pipe show $outpipe | tail -1 | awk '{ print $6 }

    This is the output of ipfw pipe show $pipe_no
    BKT Prot _Source IP/port_ __Dest. IP/port___ Tot_pkt/bytes Pkt/Byte Drp
      0 tcp 24.76.245.191/62165 202.79.50.55/4347 2826105 864936484 42 11232
    150386
    I assumed the 6th field gives the total bytes going though the pipe.
    These two commands give the bytes going through the pipe and I am using the
    values to plot the mrtg graph.
    But I see b/w utilization exceeding 64Kbit. At one point it reached 93Kbit!!
    Am I using wrong countres to obtain b/w utilization?? please aadvice.

    with regards,
    Bikrant

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