Linux Temporary Address - Premature expiry

[Sebastian Wiesinger]

* Sebastian Wiesinger <ipv6-ops at ml.karotte.org> [2012-01-13 16:06]:
> Hello,
> 
> I don't know if anyone (except me) tries to use IPv6 temporary
> addresses (Privacy Extensions) on Linux.
> 
> I tried to use them but noticed that temp_prefered_lft (86400) and
> temp_valid_lft (806400) are ignored. My linux changes temporary
> addresses every hour and the old address disappears.

Okay, I think I found the problem:

My router is sending it's RAs with

Valid time              :         7200 (0x00001c20) seconds
Pref. time              :         3600 (0x00000e10) seconds

The linux kernel compares temp_prefered_lft / temp_valid_lft to these
and then uses the lesser of the two.

Regards

Sebastian

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