LISP Frequently Asked Questions

Q1. What is LISP?

The Locator/ID separation protocol (LISP) is a new IP routing architecture that implements a "level of indirection" which separates IP addresses into two namespaces: Endpoint Identifiers (EIDs) -- those assigned to end-hosts, and Routing Locators (RLOCs) -- those assigned to devices (primarily routers) that make up the global routing system. In this architecture, there is clear separation between "who" the endpoint is, and "where" the endpoint currently is located. By separating EIDs and RLOCs, LISP inherently enables numerous benefits within a single protocol, including: Low OpEx multihoming with ingress traffic engineering; address familiy independence for efficient IPv6 Transition support; high-scale Virtualization/Multi-tenancy support; Data Center/Cloud Mobility support, including session persistence across mobility events; and seamless mobile node support.

Q2. Why was LISP developed?

Q3. Is LISP a standard? Does Cisco own LISP?

Q4. How is LISP deployed?

Q5. What are the logical components of LISP?

Q6. Which LISP components are supported by Cisco?

Q7. How does a LISP-enabled site communicate with another LISP-enabled site?

Q8. How does a LISP-enabled site communicate with a non-LISP site?

Q9. How does LISP work in a mixed IPv4/IPv6 environment?

Q10. How does LISP handle the maximum transmission unit (MTU)?

Q11. Is LISP compatible with Network Address Translation (NAT)?

Q12. What are some key use cases for LISP?

Q13. What benefits does LISP bring to multihomed environments?

Q14. What benefits does LISP bring to single-homed environments?

Q15. What benefits does LISP bring to the data center?

Q16. What about fast mobility? Does Cisco plan to implement a LISP mobile node client?

Q17. How can LISP help me in my transition to an IPv6 environment?

Q18. Where can I find more information about LISP?