Date: Sat, 24 Mar 2001 22:27:30 -0500 From: "Anthony Volodkin" <bytehedd@yahoo.com> To: <freebsd-isp@freebsd.org> Subject: Bridging on FreeBSD - loss of data in packets. Message-ID: <003b01c0b4db$86655800$0201a8c0@nonstandard.net>
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Hi, Today I setup bridging on a Freebsd 4.2 machine with dual Intel EEPRO100s. Added the kernel option, set the sysctl variables, and setup ipfw to allow all traffic (got my info from here: http://people.freebsd.org/~nsayer/bdg-ipfw.txt ) Then i connected another machine to fxp1 via a crossover cable. Fxp0 is connected to the rest of the network. When I try to ping any machine on the other side of the bridge from the box behind it, most of my packets (149 of 150 pings) get lost. Occasionally a few make it through. I decided to tcpdump on the bridge to see if I can see anything unusual. Here's what grabbed my attention: 20:27:33.722272 truncated-ip - 38 bytes missing!10.10.9.1 > 10.10.9.2: icmp: echo request (DF) 20:27:59.511615 truncated-ip - 14 bytes missing!10.10.9.1.1887 > d83b5f53.dsl. flashcom.net.http: S 3132881080:3132881080(0) win 5840 <mss 1460,sackOK,[|tcp]> (DF) There were LOTS of these from the 10.10.9.1, the box behind the router! I guess they are the reason its not working. The only reason I can think of is the fact that the box behind the bridge is equipped with a 10Mbit card while the bridge itself has 100Mbit cards. Has anyone else ever had this problem? What can I do to diagnose this further, or fix it? Any input is highly appreciated. Thanks! Anthony Volodkin http://non-standard.net/ _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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