From: David Ahern <dsahern@gmail.com>
To: James Prestwood <prestwoj@gmail.com>, netdev@vger.kernel.org
Cc: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
David Ahern <dsahern@kernel.org>, Roopa Prabhu <roopa@nvidia.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Vladimir Oltean <vladimir.oltean@nxp.com>,
Ido Schimmel <idosch@nvidia.com>,
Nikolay Aleksandrov <nikolay@nvidia.com>,
Chinmay Agarwal <chinagar@codeaurora.org>,
Yajun Deng <yajun.deng@linux.dev>, Tong Zhu <zhutong@amazon.com>,
Johannes Berg <johannes@sipsolutions.net>,
Jouni Malinen <jouni@codeaurora.org>
Subject: Re: [PATCH v5 0/2] Make neighbor eviction controllable by userspace
Date: Thu, 21 Oct 2021 16:09:39 -0600 [thread overview]
Message-ID: <944f6c2e-bb84-0dfd-b411-1ddefeddb78e@gmail.com> (raw)
In-Reply-To: <1903d7cb20ac31d95e2440424a00190522facb47.camel@gmail.com>
On 10/21/21 3:59 PM, James Prestwood wrote:
> So the test itself is pretty simple. The part I'm unsure about is how
> you actually set the carrier state from userspace. I see "ip link set
> <dev> carrier {on,off}" but this reports not supported for veths,
> wlans, and eth interfaces I have tried. AFAIK the driver controls the
> carrier state. Maybe some drivers do support this?
>
> Is there a way to set the carrier state that you, or anyone is aware
> of?
with veth pairs, if you set one down the other goes into no-carrier mode
make veth0 the one you are validating and put veth1 in a namespace
called testing. Then 'ip -netns testing li set veth1 down' put veth0 in
NO_CARRIER
prev parent reply other threads:[~2021-10-21 22:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 0:32 [PATCH v5 0/2] Make neighbor eviction controllable by userspace James Prestwood
2021-10-21 0:32 ` [PATCH v5 1/2] net: arp: introduce arp_evict_nocarrier sysctl parameter James Prestwood
2021-10-21 14:08 ` David Ahern
2021-10-21 0:32 ` [PATCH v5 2/2] net: ndisc: introduce ndisc_evict_nocarrier " James Prestwood
2021-10-21 14:15 ` David Ahern
2021-10-21 2:33 ` [PATCH v5 0/2] Make neighbor eviction controllable by userspace David Ahern
2021-10-21 21:59 ` James Prestwood
2021-10-21 22:09 ` David Ahern [this message]
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