Show 54 – Speaking With A LISP Expert – Cisco’s Victor Moreno

This show was recorded on July 7, 2011 (the week before Cisco Live Las Vegas), where Greg and Ethan were joined by subject matter expert Victor Moreno of Cisco in a topical podcast about LISP, the Locator/ID Separation Protocol.


  • What is LISP?
  • What problems are addressed by LISP?
  • How does LISP impact your existing core routing infrastructure?
  • What’s the difference between an RLOC and an EID?
  • How does LISP help with device mobility?
  • How does a packet get from one LISP site to another?
  • LISP uses a (sort of) tunnel, so how much overhead is introduced?
  • How does PMTUD work in a LISP environment?
  • How does LISP help us with multihoming & equal-cost load-balancing between sites?
  • What are LISP’s loop prevention & route optimization mechanisms?
  • Is there a way to apply routing policies to a LISP environment?
  • Is LISP going to talk directly to devices like vCenter or OpenFlow controllers?
  • Do all LISP routers maintain a synchronized routing table?
  • Cisco has an inside joke that “the only way is the overlay.” What’s that mean?
  • Are enterprises dependent on their ISPs if they’d like to leverage LISP?
  • What are some applications for privately deployed LISP inside the data center?
  • How does LISP detect when a host has moved from one domain to another?
  • What is the RFC status of LISP?
  • Would Cisco bet the data center on LISP?
  • What Cisco platforms will LISP be supported on?
  • Will LISP support highly dynamic environments where hosts move frequently?
  • What is Cisco’s reaction to informational RFC6115, Recommendation for a Routing Architecture?
  • What security is baked into the current LISP iteration?



Ethan Banks
Ethan Banks, CCIE #20655, has been managing networks for higher ed, government, financials and high tech since 1995. Ethan co-hosts the Packet Pushers Podcast, which has seen over 3M downloads and reaches over 10K listeners. With whatever time is left, Ethan writes for fun & profit, studies for certifications, and enjoys science fiction. @ecbanks
Ethan Banks
Ethan Banks
  • Chris Marino

    Great podcast. Learned a lot. Although trying not to be stupid about this, but it seems to me that for a some of the problems (many?? most?? I don’t know) that are supposed to be solved with LISP could easily be solved via other means. Certainly within the data center, this seems like overkill. There, why will Endpoint Identifiers (EIDs) be any better than MACs??

    • Etherealmind

      Your choice of scope is too limited. Data Centre networks are only a small fraction of the networking industry overall and, even though there is a lot of growth to come, it’s off a very small base.

      The real opportunity for LISP is to be able to multi-home Internet or WAN connections without having to use BGP routing tables. This technology can be extended into the data centre to be very close to the host and thus provide a global solution to host mobility without impacting any existing systems.

      Because MACs addresses cannot be summarised they will never be useful as an EID outside of a closed system such as the data centre.

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