From: Patrick McHardy <kaber@trash.net>
To: Milan Kocian <milon@wq.cz>
Cc: netdev@vger.kernel.org
Subject: Re: Difference between device statistics from ifconfig and ip -s l l
Date: Wed, 17 Oct 2007 11:36:30 +0200 [thread overview]
Message-ID: <4715D79E.7020201@trash.net> (raw)
In-Reply-To: <20071017092659.GA16356@wq.cz>
Milan Kocian wrote:
> hello,
>
> see dropped packets, please:
>
> sit:~# ifconfig eth0
> eth0 Link encap:Ethernet HWaddr 00:04:23:D6:D5:DE
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:522284892 errors:0 dropped:16800 overruns:0 frame:0
> TX packets:506064445 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:1405350664 (1.3 GiB) TX bytes:4082649020 (3.8 GiB)
> Base address:0xac00 Memory:ff6e0000-ff700000
>
> see via ip l l (here are no dropped packets):
>
> sit:~# ip -s l l dev eth0
> 2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc htb qlen 1000
> link/ether 00:04:23:d6:d5:de brd ff:ff:ff:ff:ff:ff
> RX: bytes packets errors dropped overrun mcast
> 2494988681 523755694 0 0 0 57458
> TX: bytes packets errors dropped carrier collsns
> 453184821 507470461 0 0 0 0
>
> but see more detailed stats (dropped packet are as missed in RX errors ?!):
>
> sit:~# ip -s -s l l dev eth0
> 2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc htb qlen 1000
> link/ether 00:04:23:d6:d5:de brd ff:ff:ff:ff:ff:ff
> RX: bytes packets errors dropped overrun mcast
> 2752159866 524110163 0 0 0 57485
> RX errors: length crc frame fifo missed
> 0 0 0 0 16800
> TX: bytes packets errors dropped carrier collsns
> 607359337 507807361 0 0 0 0
> TX errors: aborted fifo window heartbeat
> 0 0 0 0
>
> Is this bug or feature ? From my point of view is somewhere lost any sum.
> Or is it driver dependent? Kernel 2.6.23.1 (in 2.6.20.20 is the same behavior),
> driver e1000. iproute2-ss070313; net-tools 1.60, ifconfig 1.42 (2001-04-13)
ifconfig gets its data from /proc/net/dev, which adds up rx_errors
and rx_missed.
next prev parent reply other threads:[~2007-10-17 9:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-17 9:27 Difference between device statistics from ifconfig and ip -s l l Milan Kocian
2007-10-17 9:36 ` Patrick McHardy [this message]
2007-10-17 10:13 ` Milan Kocian
2007-10-17 10:35 ` Patrick McHardy
2007-10-17 11:29 ` Milan Kocian
2007-10-17 12:01 ` jamal
2007-10-17 13:42 ` Milan Kocian
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