Re: [PATCH v2 net-next 1/1] Allow user to set metric on default route learned via Router Advertisement.

On 1/19/21 3:17 PM, praveen chaudhary wrote:

quoted

quoted

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For IPv4:
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Config in etc/network/interfaces
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auto eth0
iface eth0 inet dhcp
   metric 4261413864

how does that work for IPv4? Is the metric passed to the dhclient and it
inserts the route with the given metric or is a dhclient script used to
replace the route after insert?

Yes, DHCP client picks config under “iface eth0 inet dhcp” line and if metric is configured, then it adds the metric for all added routes.

As I recall ifupdown{2} forks dhclient as a process to handle dhcp
config, and I believe there is a script that handles adding the default
route with metric. Meaning ... it is not comparable to an RA.

Thanks a lot again for spending time for this Review,
This feature will help SONiC OS [and others Linux flavors] for better IPv6 support, so thanks again.

I think SONiC is an abomination, so that is definitely not the
motivation for my reviews. :-)