linux-kernel - Re: [PATCH net-next v2] net-sysfs: expose number of carrier on/off changes

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Message-ID: <20140329183628.509f1239@nehalam.linuxnetplumber.net>
Date:	Sat, 29 Mar 2014 18:36:28 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	David Decotigny <decot@...glers.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Eric Dumazet <edumazet@...gle.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Weilong Chen <chenweilong@...wei.com>,
	Jiri Pirko <jiri@...nulli.us>, Amir Vadai <amirv@...lanox.com>,
	Michael Dalton <mwdalton@...gle.com>,
	Al Viro <viro@...IV.linux.org.uk>, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH net-next v2] net-sysfs: expose number of carrier on/off
 changes

On Sat, 29 Mar 2014 09:48:35 -0700
David Decotigny <decot@...glers.com> wrote:

> This allows to monitor carrier on/off transitions and detect link
> flapping issues:
>  - new /sys/class/net/X/carrier_changes
>  - new rtnetlink IFLA_CARRIER_CHANGES (getlink)
> 
> Tested:
>   - grep . /sys/class/net/*/carrier_changes
>     + ip link set dev X down/up
>     + plug/unplug cable
>   - updated iproute2: prints IFLA_CARRIER_CHANGES
>   - iproute2 20121211-2 (debian): unchanged behavior
> 
> Signed-off-by: David Decotigny <decot@...glers.com>

Is there a related SNMP MIB variable? should there be?


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