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Date:      Thu, 16 Dec 2010 08:50:06 GMT
From:      Dennis Yusupoff <yusdyr@gmail.com>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   misc/153206: "netstat -sz" doesn't reset any IPv6 statistic
Message-ID:  <201012160850.oBG8o66x064235@red.freebsd.org>
Resent-Message-ID: <201012160900.oBG90KRk078909@freefall.freebsd.org>

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>Number:         153206
>Category:       misc
>Synopsis:       "netstat -sz" doesn't reset any IPv6 statistic
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Dec 16 09:00:19 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Dennis Yusupoff
>Release:        8.1-STABLE
>Organization:
SOHO
>Environment:
FreeBSD server.dyr 8.1-STABLE FreeBSD 8.1-STABLE #5: Wed Nov 10 23:34:51 MSK 2010     root@server.dyr:/usr/obj/usr/src/sys/DYR_SERVER  amd64
>Description:
nestat doesn't clear IPv6 statictic, under any circumstates, by using "netstat -sz" or "netstat -s -z -f inet6".

===
root@server:/usr/home/dyr (7203) netstat -ssz -f inet6; netstat -ss -f inet6
tcp:
        1767 packets sent
                243 data packets (32971 bytes)
                1212 ack-only packets (0 delayed)
                101 window update packets
                211 control packets
        1490 packets received
                404 acks (for 33086 bytes)
                14 duplicate acks
                1092 packets (1392624 bytes) received in-sequence
                7 window update packets
                1 packet received after close
        101 connection requests
        14 connection accepts
        102 connections established (including accepts)
        116 connections closed (including 0 drops)
                15 connections updated cached RTT on close
                15 connections updated cached RTT variance on close
        13 embryonic connections dropped
        402 segments updated rtt (of 402 attempts)
        18 retransmit timeouts
        2 keepalive timeouts
                2 connections dropped by keepalive
        918 correct data packet header predictions
        14 syncache entries added
                14 completed
        14 cookies sent
        7 SACK options (SACK blocks) received
udp:
        438 datagrams received
        22 dropped due to no socket
        7 broadcast/multicast datagrams undelivered
        34 dropped due to full socket buffers
        375 delivered
        392 datagrams output
ip6:
        669902 total packets received
        93933 packets for this host
        517361 packets forwarded
        192733 packets sent from this host
        265 multicast packets which we don't join
        Input histogram:
                TCP: 377282
                UDP: 69829
                ICMP6: 214085
                no next header: 8706
        Mbuf statistics:
                26188 one mbuf
                two or more mbuf:
                        lo0= 2
                643712 one ext mbuf
                0 two or more ext mbuf
        Source addresses selection rule applied:
                111354 first candidate
                10366 same address
                139781 appropriate scope
                135406 outgoing interface
icmp6:
        28088 calls to icmp6_error
        Output histogram:
                unreach: 28088
                echo reply: 12
                router advertisement: 9185
                neighbor solicitation: 52557
                neighbor advertisement: 20923
                MLDv2 listener report: 22
        Input histogram:
                echo: 12
                router solicitation: 197
                router advertisement: 10877
                neighbor solicitation: 20923
                neighbor advertisement: 37674
        Histogram of error messages to be generated:
                4635 address unreachable
                23453 port unreachable
        12 message responses generated
ipsec6:
rip6:
tcp:
        11 packets sent
                11 data packets (2636 bytes)
        3 packets received
                3 acks (for 2688 bytes)
        2 segments updated rtt (of 1 attempt)
udp:
ip6:
        669902 total packets received
        93933 packets for this host
        517361 packets forwarded
        192733 packets sent from this host
        265 multicast packets which we don't join
        Input histogram:
                TCP: 377282
                UDP: 69829
                ICMP6: 214085
                no next header: 8706
        Mbuf statistics:
                26188 one mbuf
                two or more mbuf:
                        lo0= 2
                643712 one ext mbuf
                0 two or more ext mbuf
        Source addresses selection rule applied:
                111354 first candidate
                10366 same address
                139781 appropriate scope
                135406 outgoing interface
icmp6:
        28088 calls to icmp6_error
        Output histogram:
                unreach: 28088
                echo reply: 12
                router advertisement: 9185
                neighbor solicitation: 52557
                neighbor advertisement: 20923
                MLDv2 listener report: 22
        Input histogram:
                echo: 12
                router solicitation: 197
                router advertisement: 10877
                neighbor solicitation: 20923
                neighbor advertisement: 37674
        Histogram of error messages to be generated:
                4635 address unreachable
                23453 port unreachable
        12 message responses generated
ipsec6:
rip6:
===

>How-To-Repeat:
Do netstat -ssz -f inet6; netstat -ss -f inet6 and compare.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:



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