A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : End Host Mobility Use Cases for LISP
Authors : Yves Hertoghs
Marc Binderberg
Filename : draft-hertoghs-lisp-mobility-use-cases-00.txt
Pages : 17
Date : 2014-02-14
Abstract:
This memo proposes use cases for LISP in the area of end Host
mobility. The applicability of end host mobility can be found in
data centers, where Virtual Machines (VM's) can be moved freely from
one physical server onto another physical server, independent of
location, without having to change the IP/MAC-addresses inside those
VMs, nor impacting traffic flows to and from those VMs. Wireless end
hosts are another area of applicability. Although this draft will
not address wireless end host mobility, most of the same principles
apply.
Traditionally L2 extension technologies have been used to handle
mobility events, but they could lead to suboptimal routing of traffic
to and from the end host after the mobility event, as well as created
big broadcast domains. This memo describes how LISP solves the
traffic optimization issues caused by a mobility event of an end host
like a Virtual Machine, as it decouples the identity of the end host
from its location, such that traffic will always be forwarded to the
correct location. More-over the LISP control plane can be leveraged
to discover and distribute the reachability information of end hosts
such that end to end broadcast domains, and their associated
problems, are no longer needed.
Various sub-use cases will be looked at in this draft, depending on
whether mobility is achieved at L2 (using MAC-addresses as EID) or at
L3 (using IP addresses as EIDs), and whether subnets are L2 extended
across LISP sites or not. This memo also describes how to handle
mobility in the case where the default gateway of the end host is not
capable of performing the LISP map-and-encap function, while the LISP
xTR function is located one or more L3 hops away from the default
gateway.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-hertoghs-lisp-mobility-use-cases/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-hertoghs-lisp-mobility-use-cases-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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