Cisco Nexus 7000 Series Configuration Manual page 54

Configuring Simple LISP Shared Model Virtualization
Note All IPv4 or IPv6 EID-sourced packets destined for both LISP and non-LISP sites are forwarded in one of two
ways:
• LISP-encapsulated to a LISP site when traffic is LISP-to-LISP
• Natively forwarded when traffic is LISP-to-non-LISP
Packets are deemed to be a candidate for LISP encapsulation when they are sourced from a LISP EID and the
destination matches one of the following entries:
• a current map-cache entry
• a default route with a legitimate next-hop
• a static route to Null0
• no route at all
In this configuration example, because the xTR has IPv4 RLOC connectivity, a default route to the upstream
SP is used for all IPv4 packets to support LISP processing. Adding an IPv6 default route to Null0 ensures
that all IPv6 packets are handled by LISP processing. (The use of the static route to Null0 is not strictly
required, but is a LISP best practice.)
The components in the figure above are as follows:
LISP site
• The CPE functions as a LISP ITR and ETR (xTR).
• Both LISP xTRs have two VRFs: GOLD and PURPLE. Each VRF contains both IPv4 and IPv6
EID-prefixes. A LISP instance ID is used to maintain separation between two VRFs. In this example,
the share key is configured "per-site" and not "per-VRF." (Another configuration could configure the
shared key per-VPN.)
• Each LISP xTR has a single RLOC connection to a shared IPv4 core network.
Mapping system
• One map server/map resolver system is shown and is assumed available for the LISP xTR to register to.
The MS/MR has an IPv4 RLOC address of 10.0.2.2 within the shared IPv4 core.
• The map server site configurations are virtualized using LISP instance IDs to maintain separation between
the two VRFs.
Perform the following procedure (once through for each xTR in the LISP site) to enable and configure LISP
ITR and ETR (xTR) functionality when using a LISP map server and map resolver for mapping services. The
example configurations at the end of this task show the full configuration for two xTRs (xTR1 and xTR2).
Summary Steps
Before you begin, create the VRF instances by using the vrf definition command.
Before you begin
Create the VRFs using the vrf definition command.
Cisco Nexus 7000 Series NX-OS LISP Configuration Guide
42
LISP Instance-ID Support