LISP

LISP Terminology

• EID: Endpoint ID, e.g. server's IP address

• RLOC: Routing Locator, e.g. router's link ip address

• MS: Map Server: keep track of table of EID and corresponding RLOC used to reach that EID

• MR: Map Resolver: responds to map-request messages

• iTR: Ingress Tunnel Router:

  • Asks Map Resolve for EID to RLOC mapping

  • Encapsulates packet in LISP (UDP)

• eTR: Egress Tunnel Router:

  • Decapsulate LIPS and forwards to destination

  • Register EID/RLOC mapping to Map Server

• xTR: combine roles of iTR and eTR

• PiTR: Proxy Ingress Tunnel Router, iTR which connects LISP to non LISP

• PeTR: Proxy Egress Tunnel Router, eTR which connects LISP to non LISP

• PxTR: combined PiTR and PeTR

Configuration

iTR/eTR Functionality

feature lisp
ip lisp itr
ip lisp etr
ip lisp itr map-resolver $IPAddressMR
ip lisp database-mapping $PrefixToRegister $IPAddressOfRLOC priority 1 weight 100
ip lisp etr map-server $IPAddressMS key 0 $Password

MS/MR Functionality

ip lisp map-resolver
ip lisp map-server
lisp site DC_site_1
authentication-key 0 $Password
eid-prefix $PrefixToRegister-byiTR

Verification

• show ip lisp

• show lisp site

• show ip lisp map-cache

LISP Mobility

feature lisp

ip lisp itr
ip lisp etr
ip lisp itr map-resolver $IPAddressOfMR
ip lisp etr map-server $IPAddressOfMS key 0 $PASSWORD
lisp dynamic-eid VLAN_10
  database-mapping $PREFIX $IPofRLOC priority 1 weight 50
  map-notify-group 224.10.10.10

interface vlan10
  lisp mobility VLAN_10
  lisp extend-subnet-mode

# MAP Server
site DC1
  authentication-key $PASSWORD
  eid-prefix $PREFIX accept-more-specifics

Reference

• Cisco LISP - Locator/ID Separation Protocol (sd-access protocol): https://www.youtube.com/watch?v=5zHwZOOG8Nk