RE: Dummynet problem in setting up PolyMix-3

From: Sych, Terry (
Date: Wed Feb 28 2001 - 09:43:57 MST

Hi Alex,

Thanks for the quick response. I'm sure this
is the problem. I thought the "Kernel Config
File" information was needed if you downloaded
the FreeBSD source and built your own kernel.


-----Original Message-----
From: Alex Rousskov []
Sent: Wednesday, February 28, 2001 9:29 AM
To: Sych, Terry
Cc: Polygraph MailList (E-mail)
Subject: Re: Dummynet problem in setting up PolyMix-3


        After installing generic FreeBSD kernel, you need to switch to
the optimized kernel that also has ipfw enabled. Did you do that? See
the "Kernel Config File" section at

You can start with your GENERIC configuration file and apply the
recommended changes. This approach may leave some unneeded
drivers/modules in the kernel. Alternatively, you can start with our
CACHEOFF3 configuration file and add missing drivers (e.g., if you
have a non-Intel NIC) as needed.

Regardless of the approach, you will need to remake and install the
kernel with the new/updated file (as described in the section above)
and reboot.



On Wed, 28 Feb 2001, Sych, Terry wrote:

> I ran into a problem in setting up Polygraph
> for the first time. I'm using Polygraph 2.5.4
> and FreeBSD from Measurement Factory. I'm
> following the directions in "How to run
> a Polymix-3 test" on the TMF website.
> I get a "Protocol not available" error message
> during all ipfw commands during the Dummynet
> configuration. An example:
> ipfw: setsockopt(IP_FW_FLUSH): Protocol not available
> This is my first experience with FreeBSD. Did
> I install the OS correctly? Do I need to configure
> or enable the firewall first?
> I appreciate any help on this.
> Thanks,
> Terry Sych
> --
> 3.5: Configure Dummynet
> On all polygraph clients, run:
> # ipfw -f flush
> On all polygraph servers, run
> # ipfw -f flush
> # ipfw pipe 1 config delay 40ms plr 0.0005
> # ipfw pipe 2 config delay 40ms plr 0.0005
> # ipfw add pipe 1 ip from any to 10.X.0.0/16 in
> # ipfw add pipe 2 ip from 10.X.0.0/16 to any out
> Check your work! Ping a client from a server and you should see round trip
> times of about 80 msec.

This archive was generated by hypermail 2b29 : Tue Jul 10 2001 - 12:00:17 MDT