Lisp Devices Overview - Cisco Nexus 7000 Series Configuration Manual

LISP Devices Overview

LISP changes current IP address semantics by creating two new namespaces: Endpoint Identifiers (EIDs) that
are assigned to end-hosts and Routing Locators (RLOCs) that are assigned to devices (primarily routers) that
make up the global routing system. These two namespaces provide the following advantages:
• Improved routing system scalability by using topologically aggregated RLOCs
• Provider independence for devices numbered out of the EID space
• Multihoming of endsites with improved traffic engineering
• IPv6 transition functionality
LISP is deployed primarily in network edge devices. It requires no changes to host stacks, Domain Name
Service (DNS), or local network infrastructure, and little to no major changes to existing network infrastructures.
Figure 1: Cisco NX-OS LISP Deployment Environment
This figure shows a LISP deployment environment. Three essential environments exist in a LISP environment:
LISP sites (EID namespace), non-LISP sites (RLOC namespace), and LISP Mapping Service (infrastructure).
The LISP EID namespace represents customer end sites as they are defined today. The only difference is that
the IP addresses used within these LISP sites are not advertised within the non-LISP, Internet (RLOC
namespace). End customer LISP functionality is deployed exclusively on CE routers that function within
LISP as Ingress Tunnel Router (ITR) and Egress Tunnel Router (ETR) devices.
Note The ITR and ETR are abbreviated as xTR in the figure.
To fully implement LISP with support for Mapping Services and Internet interworking, you might need to
deploy additional LISP infrastructure components such as Map Server (MS), Map Resolver (MR), Proxy
Ingress Tunnel Router (PITR), Proxy Egress Tunnel Router (PETR), and Alternative Topology (ALT).
LISP Devices Overview
The following devices are found in a full LISP deployment:
Cisco Nexus 7000 Series NX-OS LISP Configuration Guide
4
Configuring Locator ID Separation Protocol