My own experience was that I tried to use the 2000::/3 route initially and that was fine with static routes in my lab, but once dynamic routing protocols were introduced, ::/0 was the only thing recognized as "default" to propagate or not with default-route statements in BGP and OSPF. That may vary from platform to platform, however the ones I played with all exhibited this behaviour. Theodore Baschak - AS395089 - Hextet Systems https://ciscodude.net/ - https://hextet.systems/ http://mbix.ca/ On Thu, Mar 2, 2017 at 8:01 PM, Dennis Bohn <bohn@adelphi.edu> wrote:
Interesting question whether 2000::/3 or ::/0 is the better default route. From what I can tell (as OP indicated) most are using ::/0. (I should probably add for those who have not been running V6 for long that for the forseeble future 2000::/3 is the extent of the V6 allocation, the rest being held back for future use. Which is why that could be a default.) Is there any case where 2000::/3 would hurt one? One person mentioned something like 64:ff9b::/96, which per http://www.iana.org/assignments/iana-ipv6-special- registry/iana-ipv6-special-registry.xhtml, is the v4 to v6 translator net. Does anyone actually use that? best, dennis
Dennis Bohn Manager of Network and Systems (ret) Adelphi University bohn@adelphi.edu
On Thu, Mar 2, 2017 at 12:20 PM, Baldur Norddahl < baldur.norddahl@gmail.com> wrote:
Shouldn't that be 2000::/3 ?
Den 2. mar. 2017 17.06 skrev "Aaron Gould" <aaron1@gvtc.com>:
Correction... ::/0 is what I learn from those 3 :)