Naive IPv6 (was AT&T UVERSE Native IPv6, a HOWTO)

Christopher Morrow morrowc.lists at
Wed Dec 4 21:30:04 UTC 2013

On Wed, Dec 4, 2013 at 3:58 PM, Brian Dickson
<brian.peter.dickson at> wrote:
> On Wed, Dec 4, 2013 at 3:48 PM, Christopher Morrow <morrowc.lists at>
> wrote:
>> On Wed, Dec 4, 2013 at 3:43 PM, Brian Dickson
>> <brian.peter.dickson at> wrote:
>> > Except that we have a hard limit of 1M total, which after a few 100K
>> > from
>> where does the 1M come from?
> FIB table sizes, usually dictated by TCAM size. Think deployed hardware,
> lots of it.
> (Most instances of TCAM share it for IPv4 + IPv6, with each slot on IPv6
> taking two slots of TCAM, IIRC. And a few other things also consume TCAM,
> maybe not as significantly.)
> (Newer boxes may handle more on some network's cores, but I don't believe it
> is ubiquitously the case across the DFZ.)

ok, that's fair... but in ~5yrs time we'll work ourslves out of the 1M
mark, right? to 5M or 10M? (or something more than 1M)

More information about the NANOG mailing list