On Wed, Dec 8, 2010 at 11:41 AM, Dobbins, Roland <rdobbins@arbor.net> wrote:
On Dec 9, 2010, at 2:38 AM, Cameron Byrne wrote:
I still fail to see the value of LISP in a mature and sane IPv6 world.
Abstraction of the global routing table away from direct dependence upon the underlying transport in use at a given endpoint network alone offers huge benefits for futureproofing; there are lots of other benefits as well, for mobility, CDNs, and so forth.
I believe a lot of folks think the routing paths should be tightly coupled with the physical topology. If not, there is MPLS. If underlying transport is IPv6, i don't see the incremental value (hence mature IPv6 world comment, most major ISPs are pretty well along the way). IP Mobility as in Mobile IP already exists .... not terribly popular. There is already abstraction within most ISPs with MPLS. Yet another layer of abstraction is just not something i would consider lightly with Internet scale. Just my humble opinion. Today, IPv6 provides real value with larger address space. MPLS provides real value with FRR and network virtualization (MPLS L3 VPNs). In a mature IPv6 world, that is sane, i am not sure what the real value of LISP is. But, IMHO, i do think there is something to the long term value of ILNP. I am just very biased again additional tunnels, encapsulation/overhead, complexity, and that is what LISP is, edge to edge tunnels. Then there is the question of who benefits from LISP and who pays. The edge pays and the DFZ guys benefit (they deffer router upgrades).... i already pay the DFZ guys enough today. Cameron
----------------------------------------------------------------------- Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.com>
Sell your computer and buy a guitar.