Hi
I have the following scenario:
- a router with openwrt
- a (german) VDSL connection with IPv4 and IPv6
- a delegated IPv6 prefix (/56) that I use in my internal LAN segments
My problem:
I happens that I have to reconnect my VDSL (update of router, tripped
over cable, whatever) - with that I get a new IPv6 prefix delegated. Now
my clients have 2 prefixes/addresses. The old one (before the router
reboot/reconnect) and a new one. That's bad because the old one won't
route anymore. simple solution: set the lifetime to sth like 5min or so
and the old addresses gets deprecated fast enough.
Now my ULA addresses have also a lifetime of 5min - which is bad because
after 5 min of router downtime (update) I lose my local delivery between
clients.
My solution (to this very specific and edge case problem) would be to
set a large lifetime for ULA prefixes and use a short one for WAN delegated.
My idea would be to allow the user to set (optional) a ULA lifetime
where one can specify the ULA prefix. The odhcpd process would then use
this config entry and send RA with the respective lifetime.
I write to gather feedback and maybe alternative solutions and if a path
/ PR for my solution would be accepted.
kind regards
//chriss
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