Re: I-D Action: draft-gont-6man-slaac-renum-02.txt

[Fernando Gont <[e-mail]>]

Hello, Erik,

On 5/3/20 01:29, Erik Kline wrote:
> Is the 4.4 stuff really what we want?  I kinda think there might be 
> other options.

The stuff in Section 4.4 follows the principle of "do smarts at hosts", 
in this case, *without explicit signalling* from routers.  This allows 
hosts to recover from stale information even with current/legacy routers.



> For example, something like an ND Option that routers can include in 
> their NA (they already set the IsRouter flag).

The stuff in Section 4.4 doesn't exclude options like this. In fact, 
it's complementary.



> If this option 
> represented a kind of "generation number", then hosts could notice when 
> it changed during regular NUD (they don't need to wait for an RA, which 
> they might have already missed for one reason or another) and start a 
> countdown timer to send a unicast RS to check for changes.

Indeed that might be doable. However, Section 4.4 is stuff that if a 
host implements, it can already benefit from without having to wait for 
routers to be updated.

Thanks!

Cheers,
-- 
Fernando Gont
SI6 Networks
e-mail: [e-mail]
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