I've spent some time changing various parameters within pf.conf that I must
be missing something so obvious.
My real goal is to have FreeBSD see either the ECT_0 or ECT_1 bit in the IP
packet (which contains a TCP data segment) and set the CC bits so my
transport layer can react to it. For testing purposes I am also using pfctl
to emulate a 20,000 bps link, so in theory I won't need any competing flows
to congest the link. I could use Dummynet to constrain the link, but I have
no idea what the interaction between the two would be. I have set the
interface queue both via sysctl and pfctl to a small number 5. I should see
and via wireshark do see packet loss. Therefore, I would expect to set some
parameter which defines a threshold where the ECN CC bit would be set before
packet loss occurs.
Is there a problem with RED and constraining my link to 20,000 bps?
Best Regards.
Pat
_____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Adrian Penisoara Sent: Tuesday, September 25, 2007 4:05 PM To: Feighery, Patrick D. Cc: [email protected] Subject: Re: ECN Capability in the Network Layer Hi, You should lookup the pf.conf(5) man page for the red and ecn scheduler parameters (as a matter of fact ecn implies red). Regards, Adrian. On 9/24/07, Feighery, Patrick D. <[EMAIL PROTECTED]> wrote: I am currently trying to integrate an ECN capability into a third party's transport layer protocol. In the past I have used Dummynet to test how transport protocols react under a variety of strange and non-typical network characteristics. Now I am trying to use a combination of Dummynet and ECN. Unfortunately after crawling the network for a few days, I can't really figure out how to configure FreeBSD to support ECN. I have been testing with a FreeBSD 6.2 installation and have added the ALTQ into the kernel. However I can't figure out how to create an /etc/pf.conf config file for ECN. Do I need to install a different version of FreeBSD to get this functionality. Can anyone point me into the correct direction? Best Regards Pat Feighery _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw To unsubscribe, send any mail to "[EMAIL PROTECTED]"
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