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Date: Wed, 20 Aug 2014 09:29:07 +0000 From: David Laight <David.Laight@...LAB.COM> To: 'Cong Wang' <cwang@...pensource.com> CC: Jamal Hadi Salim <jhs@...atatu.com>, Linux Netdev List <netdev@...r.kernel.org> Subject: RE: Lost ping responses From: Cong Wang > On Tue, Aug 19, 2014 at 4:35 AM, David Laight <David.Laight@...lab.com> wrote: > > From: Jamal Hadi Salim > > > >> > Any ideas how to find out where the discards are happening? > >> > It might just be somewhere that would affect other traffic flows. > >> > >> netstat -s > > > > Thanks - 'Ip: outgoing packets dropped' increments for every lost response. > > > > Next step is to work out what that means... > > > > Try dropwatch, it should give you better hints. That involves finding/compiling a version that will run on ubuntu 13.10 server. And working out which extra ubuntu packages it needs to work. On a system I've built the sources on (after fixing LDLIBS) I get the error 'Unable to find NET_DM family' - whatever that means. but that isn't the system dropping packets. David
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