Date: Tue, 01 Dec 2015 09:58:35 +0300 From: Alexander V. Chernikov <melifaro@ipfw.ru> To: "elof2@sentor.se" <elof2@sentor.se>, freebsd-net <freebsd-net@freebsd.org> Subject: Re: ngrep/ixgbe bpf bug Message-ID: <944961448953115@web11h.yandex.ru> In-Reply-To: <alpine.BSF.2.00.1511301707450.54839@farmermaggot.shire.sentor.se> References: <alpine.BSF.2.00.1511051551350.49057@farmermaggot.shire.sentor.se> <alpine.BSF.2.00.1511301707450.54839@farmermaggot.shire.sentor.se>
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Do you have vlans on top of ixgbe? And actually I wonder what does tcpdump show for the same expression. ( and tcpdump -i ixX -lnes0 might provide good traces on what is going on) 30.11.2015, 19:09, "elof2@sentor.se" <elof2@sentor.se>: > No one has a theory? > > /Elof > > On Thu, 5 Nov 2015, elof2@sentor.se wrote: > >> Hi all! >> >> Why don't ngrep work on ix interfaces? >> >> It shows nice values if I sniff on other interfaces, e.g. igb0 and >> bridge0: >> >> # ngrep -d igb0 "q" ip >> I see some matching packets. Everything looks good. >> >> # netstat -B >> Pid Netif Flags Recv Drop Match Sblen Hblen Command >> 1800 igb0 p--s--- 135 0 129 380 0 ngrep >> The BPF stats show Recv and Match values. Good. >> >> # ngrep -d bridge0 "q" ip >> I see some matching packets. Good. >> >> # netstat -B >> Pid Netif Flags Recv Drop Match Sblen Hblen Command >> 1901 bridge0 p--s--- 661897 0 659170 425606 0 ngrep >> Again, the BPF stats show Recv and Match values. Good. >> >> However, if I sniff on an ix interface: >> >> # ngrep -d ix1 "q" ip >> I get no matching packets! >> >> # netstat -B >> Pid Netif Flags Recv Drop Match Sblen Hblen Command >> 1816 ix1 p--s--- 45340 0 0 0 0 ngrep >> ^^^ >> ...and the BPF stats always show zero Matches. >> >> Bug in the ixgbe driver or in ngrep? >> >> /Elof >> >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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