Subject: Re: [PATCH net-next 0/3 v4] changes to make ipv4 routing table aware of next-hop link status

From: Nicolas Dichtel <[email-masked]>
Date: Wed, 17 Jun 2015 18:05:32 +0200

Le 15/06/2015 18:33, Andy Gospodarek a écrit :
> This series adds the ability to have the Linux kernel track whether or
> not a particular route should be used based on the link-status of the
> interface associated with the next-hop.
>
> Before this patch any link-failure on an interface that was serving as a
> gateway for some systems could result in those systems being isolated
> from the rest of the network as the stack would continue to attempt to
> send frames out of an interface that is actually linked-down.  When the
> kernel is responsible for all forwarding, it should also be responsible
> for taking action when the traffic can no longer be forwarded -- there
> is no real need to outsource link-monitoring to userspace anymore.
>
> This feature is only enabled with the new per-interface or ipv4 global
> sysctls called 'ignore_routes_with_linkdown'.
>
> net.ipv4.conf.all.ignore_routes_with_linkdown = 0
> net.ipv4.conf.default.ignore_routes_with_linkdown = 0
> net.ipv4.conf.lo.ignore_routes_with_linkdown = 0
> ...
Sorry for my late reply, but is it possible to advertise this sysctl via the
netconf infra (grep NETCONFA_)?

Regards,
Nicolas