Date: Fri, 25 Jan 2002 07:37:24 -0600 (CST) From: mark tinguely <tinguely@web.cs.ndsu.nodak.edu> To: freebsd-multimedia@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG, henrich@sigbus.com Subject: Re: MBone/mrouted troubles Message-ID: <200201251337.g0PDbOu29231@web.cs.ndsu.nodak.edu> In-Reply-To: <20020124200726.B70786@sigbus.com>
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could you send the contents of both of your /etc/mrouted.conf and what is the TTL on the vic session? There was a bug discovered in FreeBSD 4.4 in MCAST forwarding when a local session is also went out the tunnel. The UDP checksum was not calculated on the forwarding packet. I do not know when the hardware checksum feature was added to FreeBSD but that may have been FreeBSD 4.2 also. The patch was not picked up in FreeBSD 4.5 (at least it is not in RC1). To look for this bug, perform a tcpdump of the tunnel's contents and you will see UDP checksum errors. If you have this problem, I can give you a simplified version of Bill Fenner's patch. --mark tinguely. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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