I've noticed a change in behaviour between FreeBSD 4.9 and FreeBSD 5.4 When sending an undirected broadcast to 255.255.255.255, FreeBSD 4.9 encapsulates this with the broadcast MAC address (ff:ff:ff:ff:ff:ff) as the destination.
However, FreeBSD 5.4 encapsulates the packet using the MAC address of the default router, and therefore nobody else on the network sees it. Where this broke me was using wakeonlan. This utility sends a magic packet to 255.255.255.255 by default, and worked under FreeBSD 4.9 but not 5.4. After debugging with tcpdump -e, I found the issue with the MAC address. Configuring the program to send to the network's broadcast address instead of 255.255.255.255 fixed the problem; the packet was addressed to ff:ff:ff:ff:ff:ff, and the other computer woke up. Now I know about this, I can demonstrate it using 'ping 255.255.255.255' just as easily. My question is: is this an intentional change? Is it documented? # egrep -i '(broadcast|255)' /usr/src/UPDATING # Thanks, Brian. _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
