On Fri, Jul 10, 2015 at 10:08:15PM +0000, Mel Beckman wrote:
> There is most certainly a cost to IPv6, especially in a large, complex 
> deployment, where everything requires acceptance testing. And I'm sure you 
> realize that IPv6 only is not an option.  I agree that it would have been 
> worth the cost, which would have been just a small fraction of the total. The 
> powers that be chose not to incur it now. But we did deploy only IPv6 gear 
> and systems, so it can probably be turned up later for that same incremental 
> cost. 
> 

        I had the luxury that as we deployed IPv6 across the network
we rolled it from the 6bone -> core -> edge over a period of a few months.

        As we shut down the 6bone/3ffe stuff and moved people to gre/ip
and native the core was ready.  This doesn't mean the edges have IPv6
turned on, but it's usually the flip of a switch.

        Where possible take your core and IPv6 enable it and then
touch the upstreams at the same time/next time you do work there.

        Assuming you patch devices for the various SIRT/PSIRT type
events, most devices will be rebooted once every 6-12 months.  this
gives you the chance to drop in and enable ipv6 during or after that 
change/maint window.

        Rolling out the core really isn't hard, go ahead and do it.  There
are plenty of people here who will help you with these steps.

        - Jared

-- 
Jared Mauch  | pgp key available via finger from [email protected]
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.

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