Date: Fri, 22 Oct 2010 16:17:47 -0400 From: Randy Bush <randy@psg.com> To: Mike Tancsa <mike@sentex.net> Cc: Chris Morrow <morrowc@ops-netman.net>, Joel Jaeggli <joelja@bogus.com>, stable <stable@freebsd.org> Subject: Re: repeating crashes with 8.1 Message-ID: <m2y69q9e38.wl%randy@psg.com> In-Reply-To: <201010221848.o9MIm7WF096197@lava.sentex.ca> References: <m2zku7cqt5.wl%randy@psg.com> <m2y69rcqjc.wl%randy@psg.com> <201010221416.o9MEGSa0094817@lava.sentex.ca> <m2tykeb9ac.wl%randy@psg.com> <201010221425.o9MEPcWC094867@lava.sentex.ca> <m2k4lab6nh.wl%randy@psg.com> <201010221848.o9MIm7WF096197@lava.sentex.ca>
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>>>>> Do you know how this panic is triggered ? Are you able to >>>>> create it on demand ? >>>> >>>> no i do not. bring server up and it'll happen in half an hour. >>>> and the server was happy for two months. so i am thinking hardware. >>> >>> Perhaps. The reason I ask is that I had a box go down last night with >>> the same set of errors. The box has a number of ipv6 routes, but its >>> next hop was down and the problems started soon after. So I wonder if >>> it has something to do with that. Do you have ipv6 on this box and >>> are all the next hop addresses correct / reachable ? >>> >>> Oct 22 02:06:02 i4 kernel: em1: discard frame w/o packet header >>> Oct 22 02:06:10 i4 kernel: em2: discard frame w/o packet header >>> Oct 22 02:06:21 i4 kernel: em1: discard frame w/o packet header >> >>it was co-incident with a border router being taken down for new router >>install. that router was the v6 exit the servers was using. i have now >>pointed default6 to a different exit. the server seems happy. > > > Are you servers still up ? I guess the question now is how to > trigger this problem on demand. Perhaps lots of inbound ipv6 traffic > with a bad next hop out ? How recent are you sources ? The kernel > said Oct 21st. Were the sources from then too ? yes, kernel and world from 21 oct chris had an idea on retrigger, install a static for a small dest that points to a hole. send a packet to the small dest. randy
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