A first measurement look at the deployment and evolution of thelocator/id separation protocol

By: 
Damien Saucez, Luigi Iannone, Benoit Donnet
Appears in: 
CCR April 2013

During the last decade, we have seen the rise of discussions regarding the emergence of a Future Internet. One of the proposed approaches leverages on the separation of the identifier and the locator roles of IP addresses, leading to the LISP (Locator/Identifier Separation Protocol) protocol, currently under development at the IETF (Internet Engineering Task Force). Up to now, researches made on LISP have been rather theoretical, i.e., based on simulations/emulations often using Internet traffic traces. There is no work in the literature attempting to assess the state of its deployment and how this has evolved in recent years. This paper aims at bridging this gap by presenting a first measurement study on the existing worldwide LISP network (lisp4.net). Early results indicate that there is a steady growth of the LISP network but also that network manageability might receive a higher priority than performance in a large scale deployment.

Public Review By: 
Sharad Agarwal

The Internet operator and research communities have been lamenting the increase in BGP routing table entries and increase in churn for some time now. Many solutions have been proposed, but few have been deployed. This paper looks at the operational deployment of the Locator/ID Separation Protocol, or LISP. LISP is a protocol that separates two functions of IP addresses -- identifying a communication endpoint, and locating where it is connected to the Internet. This provides flexibility in sending traffic to an endpoint via different connection points or routes, while managing the traditional problems of routing table bloat and churn. As can be seen on the lisp4.net website, the current LISP topology includes over a hundred tunneling routers and a large number of endpoint prefixes. This paper explains LISP, gives an overview of the current deployment, and examines how the performance of LISP has changed over time. The deployment of LISP is still in its early stages and it is premature to do an in-depth research study on it. However, the reviewers agree that this paper provides value to the community as an introduction to the protocol and statistics on the current deployment. The authors have worked diligently with the reviewers to improve their paper.