Date: Tue, 27 Aug 2002 18:24:29 -0400 (EDT) From: Mark <maxiter@inetu.net> To: freebsd-hackers@freebsd.org Subject: bridge(4) Message-ID: <Pine.BSF.4.10.10208271814530.28248-100000@norad.inetu.net>
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Greets. I'm using bridge(4) for some slightly unintended purposes, and need some insight or alternative suggestions. I have a FreeBSD 4.6.2 box with six NICs. :) I want to use bridge to mirror traffic from xl1 to xl2 and xl3 (and possibly others). I don't have a hub. :( Of course, I'm not using bridge in the traditional sense. The xl1 interface is connected to the SPAN port of a switch. Since the switch only gives me 1 span port, I have to replicate it somehow. This is where I use bridge(4). Knowing that FreeBSD's kernel bridge is not normally going to work the way I want it (it tries to be smart), I changed the bridge_in() function in /usr/src/sys/net/bridge.c to return BDG_BCAST for just about everything. This *almost* works. It gets *ALL* traffic mirrored out to xl2. The xl3 get's *SOME* of the traffic, apparently in a random (about 10% of traffic). Dunno why. This trickery get's me to about 40% cpu (I'm forwarding 15,000+ pps). Don't know if this would have anything to do with it. Anybody know why I might be seeing such behavior... or if I can get the kernel to allocate more CPU to doing such things... (it's 60% idle). Thanks. --------------------------------------------------- Mark Rekai - INetU, Inc.(tm) - http://www.INetU.net Electronic commerce - Web development - Web hosting Mark@INetU.net - Phone: (610) 266-7441 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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