Date: Mon, 28 Nov 2011 14:15:44 +0100 From: Kees Jan Koster <kjkoster@gmail.com> To: freebsd-questions@freebsd.org Subject: diagnosing packetloss: x-files edition Message-ID: <609D354C-18C6-4E12-A57D-2426D9AE8B44@gmail.com>
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Guys, The packet loss I asked about earlier is getting weirder and weirder. I = managed to track this down to being between two specific hosts = exclusively. When I run mtr from saffron to cumin I get packet loss reported on all = intermediate routers. When I run mtr from cumin to saffron I get packet = loss reported only on the end hop to saffron.=20 But (and here it gets weird) when I run mtr from saffron to any other = host on the Internet (although I have not tried exhaustively) I get *no* = packet loss at all. So what I expect now is that this is a hardware issue with the NIC in = Saffron that only affects the traffic going to cumin and not traffic to = any other host. I will swap the NIC in saffron, but I just wanted to check: * can this be caused by the fact that I use fwd rules in ipfw? Both = Saffron and Cumin have such rule. * Can this be caused by IP aliassing? With Saffron and cumin use two IP = addresses on their NIC. * Anything else? -- Kees Jan http://java-monitor.com/ kjkoster@kjkoster.org +31651838192 I hate unit tests; I much prefer the illusion that there are no errors = in my code. -- = Hendrik Muller
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