How To Configure Lisp Support For Disjointed Rloc Domains - Cisco Nexus 7000 Series Configuration Manual

How to Configure LISP Support for Disjointed RLOC Domains

An end host connected to xTR 1 in site A sends traffic to an end host attached to the xTR in site B. Since the
source and destination RLOCs are from different RLOC spaces, PxTR 1 performs the role of RTR to transport
traffic across the RLOC spaces. The detailed workflow:
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How to Configure LISP Support for Disjointed RLOC Domains
Note • Map-Servers and RTRs can be connected to eight locator scopes or address spaces.
• Type the switch# configure terminal command to enter global configuration mode (config)#
RTR configuration on PxTR 1 and the Map-Server:
PxTR 1 or RTR Configuration
Step 1 Configure LISP
(config)# feature lisp
Step 2 Create two VRF instances on the RTR, one for the underlay (VRF core), and one for the overlay
(VRF vrf5000).
Configure LISP parameters for the core VRF
Cisco Nexus 7000 Series NX-OS LISP Configuration Guide
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xTR 1 (acting as an ITR) receives traffic from an attached end host, and sends a Map-Request for the
destination EID (198.51.100.10), to the Map-Server (denoted by the IP address 192.0.2.9/32).
The Map-Server responds with a proxy reply containing the configured RTR locators (with IP addresses
192.0.2.1 and 203.0.113.15). The Map-Server does because the ITR-RLOC in the Map-Request from
xTR 1 contains the RLOC from site A.
xTR 1 populates its map-cache with locator information (that is, PxTR 1 and PxTR 2 RLOCs) for the
RTRs.
xTR 1 encapsulates LISP traffic and forwards it to the RTR in the data plane.
The RTR decapsulates the ingress LISP traffic and sends a Map-Request to the Map-Server for the
destination EID, for the first packet.
The ITR-RLOC of the Map-Request comprises the locators configured under the locator set. The locators
are 192.0.2.10 and 192.0.2.21.
A Map-Request is sent because the static map-cache is configured with the map-request command.
The Map-Server forwards the Map-Request to the ETR. The Map-Server does because the ITR-RLOC
in the Map-Request from the RTR contains RLOCs from site A and site B.
The ETR replies to the RTR with the ETR locator information.
The RTR populates its map-cache with the ETR locator information.
The RTR re-encapsulates LISP traffic forwards the ETR.
The ETR receives and sends traffic to the destination end host.
LISP Support for Disjointed RLOC Domains