Date: Wed, 4 Nov 2015 13:28:50 -0600 From: Christian Peron <csjp@sqrt.ca> To: elof2@sentor.se Cc: freebsd-net <freebsd-net@FreeBSD.org> Subject: Re: netstat -B "Recv" Message-ID: <04EF5880-800D-4A52-8CD1-DAF87EB6E37A@sqrt.ca> In-Reply-To: <alpine.BSF.2.00.1511041736240.49057@farmermaggot.shire.sentor.se> References: <alpine.BSF.2.00.1511041736240.49057@farmermaggot.shire.sentor.se>
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Your assumptions are correct, recv count is the number of packets which = are received by the bpf peer, match count is the number of packets which = matched the bpf filter that is active.. this shouldn=E2=80=99t be = happening. Are you running netstat during the tcpreplay run or after it = completed? Also can you give me more information on what specifically = mon0 is? > On Nov 4, 2015, at 10:44 AM, elof2@sentor.se wrote: >=20 >=20 > Hi! >=20 > Question: > What do the Recv column in 'netstat -B' show? >=20 > I thought it was tha amount of packets received, but appaently not so. >=20 > I send 2000000 packets from a tcpreplay machine to a receiving = machine. > I do it a few times. >=20 > On the receiver I see: > netstat -in > Name Mtu Network Address Ipkts Ierrs Idrop = Opkts Oerrs Coll > ix0 1500 <Link#1> 0c:c4:7a:58:e2:3c 0 0 0 = 0 0 0 > ix1 1500 <Link#2> 0c:c4:7a:58:e2:3d 6000000 0 0 = 0 0 0 >=20 > and then > netstat -in > Name Mtu Network Address Ipkts Ierrs Idrop = Opkts Oerrs Coll > ix0 1500 <Link#1> 0c:c4:7a:58:e2:3c 0 0 0 = 0 0 0 > ix1 1500 <Link#2> 0c:c4:7a:58:e2:3d 8000000 0 0 = 0 0 0 >=20 > So 6000000 has increased to 8000000. Good. >=20 >=20 > However, 'netstat -B' show: > Pid Netif Flags Recv Drop Match Sblen Hblen Command > 25553 mon0 p--s--- 1996862 0 2000000 0 0 tcpdump >=20 > How can the "Recv" be *lower* than "Match"? > 1996862 < 2000000. >=20 >=20 > For every new run (fast and slow) I get the same results, slightly = less than 2000000 Recv. >=20 > What am I missing? >=20 > /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"
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