Re: A common problem with SLAAC in "renumbering" scenarios

[Fernando Gont <[e-mail]>]

On 31/1/19 09:04, Sander Steffann wrote:
>> "   o  A CPE MUST record, on stable storage, the list of prefixes being
>>      advertised on each LAN segment."
>>
>> This is not always doable as some devices have very small flash with no write-leveling, so doing this generally might ruin the flash cells on some devices. This above requirement will drive cost, especially in the low end market of HGWs.
> 
> A flash cell is at least capable of 1000 to 3000 erase/write cycles. Even if the prefix would change every single day that gives a lifetime of 3 to 9 years. And prefixes shouldn't change that often anyway. When looking at more realistic estimates line a change on average once a week you'l get to 20 years. Seems more than enough for low end extra cheap devices. I don't see this driving cost up, except for spending a few hours on properly engineering this.

You don't really know where these boxes are going to be deployed. I know
of several places where you do experience electric outages several times
a week.

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