Messages in this thread | | | From | Maciej Żenczykowski <> | Date | Wed, 17 Nov 2021 01:50:54 -0800 | Subject | Re: [PATCH net-next] ipv6: don't generate link-local addr in random or privacy mode |
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> Can't 4 be the same as 3? The same netlink message can configure both > the addr_gen_mode and the token, no? > > It seems to me that the following should work, and would be much simpler. > > 1. Bring the interface down. All addresses are deleted. > 2. Send a netlink request to set addr_gen_mode RANDOM_LL_TOKEN or > PRIVACY_LL_TOKEN and set the token. > 3. Bring the interface up. Autoconf runs. The link-local address is > generated from the token. An RS is sent. When the RA is received, the > global address is generated using RFC 7217 or randomly.
Could you simply manually add an ipv6 link local address to the interface while it is down (ip -6 addr add fe80::..../64 dev X), then bring the interface up (ip link set dev X up)... All that would need to happen is the automatic link local generation would need to be suppressed if there's already a link local ip configured - which sounds like a good idea anyway, since why have two? (btw. even a manually added link local ip will get deleted when the interface gets brought back down)
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