From: Jesper Dangaard Brouer <jdb@comx.dk>
To: "David S. Miller" <davem@davemloft.net>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: BUG: NIU driver: strange issues with multicast "UDP: short packet"
Date: Tue, 03 Feb 2009 14:38:20 +0100 [thread overview]
Message-ID: <1233668300.20497.49.camel@localhost.localdomain> (raw)
I have this strange issues with multicast and the NIU driver (Sun
neptune Quad NIC). When receiving multicast traffic the kernel log
spams with something like this:
__ratelimit: 5071 callbacks suppressed
UDP: short packet: From 81.161.2.106:0 44063/1324 to 233.123.173.7:0
UDP: short packet: From 81.161.2.106:0 44063/1324 to 233.123.173.7:0
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
__ratelimit: 3555 callbacks suppressed
UDP: short packet: From 81.161.2.106:0 49320/1324 to 233.123.173.7:0
UDP: short packet: From 81.161.2.106:0 49320/1324 to 233.123.173.7:0
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
UDP: short packet: From 81.161.2.106:8304 27493/1324 to 233.123.173.7:24931
Tcpdumping the packets, the contents of the packets are correct.
The next strange thing is that I can make the log messages go away, if I
setup a static multicast route out another interface.
smcroute -a eth52 81.161.2.106 233.123.173.7 eth21
Any hints whats going wrong?
--
Med venlig hilsen / Best regards
Jesper Brouer
ComX Networks A/S
Linux Network developer
Cand. Scient Datalog / MSc.
Author of http://adsl-optimizer.dk
LinkedIn: http://www.linkedin.com/in/brouer
next reply other threads:[~2009-02-03 13:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-03 13:38 Jesper Dangaard Brouer [this message]
2009-02-03 23:38 ` BUG: NIU driver: strange issues with multicast "UDP: short packet" David Miller
2009-02-04 8:55 ` Jesper Dangaard Brouer
2009-02-04 9:00 ` David Miller
2009-02-04 9:32 ` Jesper Dangaard Brouer
2009-02-04 9:34 ` David Miller
2009-02-05 12:44 ` Jesper Dangaard Brouer
2009-02-05 12:47 ` [PATCH] Fix UDP short packet false positive Jesper Dangaard Brouer
2009-02-05 23:06 ` David Miller
2009-02-06 9:00 ` [RFC] " Jesper Dangaard Brouer
2009-02-06 9:08 ` David Miller
2009-02-06 9:55 ` [PATCH] udp: Fix potential wrong ip_hdr(skb) pointers Jesper Dangaard Brouer
2009-02-06 9:59 ` David Miller
2009-02-06 10:04 ` Eric Dumazet
2009-02-06 10:49 ` Jesper Dangaard Brouer
2009-02-06 11:11 ` David Miller
2009-02-04 11:52 ` BUG: NIU driver: strange issues with multicast "UDP: short packet" Herbert Xu
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