1. LISP Implementation Report
LISP ImplementationTeam:
Dave Meyer, Vince Fuller, Darrel Lewis,
John Zwiebel, Andrew Partan & Dino Farinacci
IETF Minneapolis
November 2008

2. Agenda This is not a Tutorial Implementation Details
Platform and OS
Schedule and Stats
Implementation Design
Features Deployed on Pilot Network
What’s Next?
LISP Implementation Report
IETF - November 2008

3. Platform and OS NX-OS runs on Linux Used as a research platform
Runs on Nexus 7K/5K & Service Blades
LISP Implementation Report
IETF - November 2008

4. ID Support draft-farinacci-lisp-09.txt draft-fuller-lisp-alt-03.txt
draft-lewis-lisp-interworking-02.txt
LISP Implementation Report
IETF - November 2008

5. Implementation Schedule
Started implementation at Prague IETF
March 2007
Implementation put on pilot network
July 2007
Since then released over 78 releases
Releases occur on demand with new features and bug fixes concurrently
We have phased testing
Unit/System Test done in development
Alpha test done on pilot network by Dave/Darrel/Vince/Andrew
Beta test done on pilot network by volunteers
LISP Implementation Report
IETF - November 2008

6. Implementation Design
LISP ITR/ETR
‘lisp’ VRF
EID-Prefix
for Site
Loopback interfaces
for LISP-ALT
GRE Tunnel
Default VRF
Loopback interfaces
in site IGP
RLOC
from SP
CE-PE Interface
EID-Prefix Subnets
Legend:
EIDs (End Site IDs) in green
RLOCs (Routing Locators) in red
Site-Facing Intefaces
LISP Implementation Report
IETF - November 2008

7. Implementation Design
LISP PTR
‘lisp’ VRF
EID-Prefixes
from eBGP
of LISP sites
Loopback interfaces
for LISP-ALT
GRE Tunnel
Default VRF
Configured
EID-Prefixes
of LISP sites
Loopback interfaces
for underlying BGP
RLOC Prefixes
Internet-facing Intefaces
Legend:
EIDs (End Site IDs) in green
RLOCs (Routing Locators) in red
LISP Implementation Report
IETF - November 2008

8. Implementation Design
LISP-ALT Router
Default VRF
GRE Tunnels
EID-Prefixes from eBGP
of LISP sites
GRE Tunnels
Loopback interfaces
for LISP-ALT
RLOC Prefixes
Internet-facing Intefaces
Legend:
EIDs (End Site IDs) in green
RLOCs (Routing Locators) in red
LISP Implementation Report
IETF - November 2008

9. Implementation Design
LISP ITR/ETR/PTR
IGP
Site-based Routing
BGP
Underlying Routing
BGP -ALT
EID-based Routing
LISP
Control Plane
Process
Map-Request
on EID
Process
Map-Reply
Mapping Database
(configured)
Default VRF
‘lisp’ VRF
RIB/FIB
Forward to
non-LISP site
Forward
Map-Request
on EID
Encapsulate
in RLOC to
LISP-site
Mapping Cache
IP/IPv6 Forwarding Engine
IPv4 EID -> IPv4/IPv6 RLOC
IPv6 EID -> IPv4/IPv6 RLOC
Packet
from Site
(ITR)
Packet
to Site
(ETR)
LISP IP/IPv6 Encap/Decap Engine
Decap packet
from Core (ETR)
Encap packet
to Core (ITR/PTR)
LISP Implementation Report
IETF - November 2008

10. Data-Plane Features ITR/ETR Support PTR Support
Split functionality
Both IPv4 and IPv6
PTR Support
‘loc-reach-bit’ Support
Setting/clearing
Observing
Both Map-Request and Data-Probe Support
Defaults to Map-Request
LISP Implementation Report
IETF - November 2008

11. Control-Plane Features
Multiple EID-prefix Support
With mixed locator-sets
“accept-map-request-mapping”
Control-plane Gleaning
With verifiable option
Off by default
Data-plane Gleaning
To detect “mobility roam event”
LISP Implementation Report
IETF - November 2008

12. Management Features Extensive Debug Commands Extensive Show Commands
How we test for correctness
How we test for control-plane performance
Extensive Show Commands
With statistics support
Locator hashing algorithm results
Traceroute support
No tunnel mode - these aren’t tunnels but encapsulating nodes
3-segment path
Source ITR ETR Destination
<- EIDs -> <- RLOCs -> <- EIDs ->
LISP Implementation Report
IETF - November 2008

13. Other Efforts IOS implementation under-way
Loc/ID split functionality
Considering IOS-XR implementation
TE-ITR/TE-ETR functionality
OpenLISP implementation been available for FreeBSD a while and being updated
For testing the specs
Considering native Linux implementation
Any other efforts?
LISP Implementation Report
IETF - November 2008

14. What’s Next? Implement Solicit-Map-Requests (SMRs)
Rate-limit Map-Requests/Map-Replies
Policy priority assignment when returning Map-Replies
Implement LISP-Multicast
PTR optimizations to reduce cache size
Continue lowering OpEx xTRs
LISP Implementation Report
IETF - November 2008

15. References Public mailing list: More info at: lisp@ietf.org
LISP Implementation Report
IETF - November 2008