On Wed, Dec 4, 2013 at 3:48 PM, Christopher Morrow <[email protected]>wrote:
> On Wed, Dec 4, 2013 at 3:43 PM, Brian Dickson > <[email protected]> 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.) Brian
