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LISP Draft Changes

LISP Draft Changes. IETF/IRTF Chicago - July 2007 Dino Farinacci Dave Meyer Vince Fuller Dave Oran. Agenda. Intro on the -00 draft Describe diffs from -00 to -01 Describe diffs from -01 to -02. draft-farinacci-lisp-00.txt. Published in January 2007

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LISP Draft Changes

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  1. LISP Draft Changes IETF/IRTF Chicago - July 2007 Dino Farinacci Dave Meyer Vince Fuller Dave Oran

  2. Agenda • Intro on the -00 draft • Describe diffs from -00 to -01 • Describe diffs from -01 to -02 IETF/IRTF Chicago 2007

  3. draft-farinacci-lisp-00.txt • Published in January 2007 • Describes idea and terminology with variants before knowing about a mapping service • Describes IP-n-IP encapsulation and where to place tunnel routers • Describes a “data-triggered” mapping method • Describes locator reachability via ICMP unreachables and Request polling • Designed specifically to solve site and ISP Traffic Engineering issues • With the side-benefit of reducing routing table bloat IETF/IRTF Chicago 2007

  4. draft-farinacci-lisp-00.txt • Many ideas from the RAWS in October 2006 • Lots of comments received privately and from the RAM & RRG mailing list Dave Meyer, Jason Schiller, Lixia Zhang, Dorian Kim, Peter Schoenmaker, Darrel Lewis, Vijay Gill, Geoff Huston, David Conrad, Ron Bonica, Ted Seely, and Mark Townsley. IETF/IRTF Chicago 2007

  5. draft-farinacci-lisp-01.txt • Published June 2007 • IETF latency made it July 2007 • Huge contributions from Dave Meyer, now co-author • Changed encapsulation format to UDP • Made LISP AFI agnostic • Added noncing and loc-reach-bits • Added text now that CONS, NERD, and APT were clearly documented • Added to the security section • Added to the multicast section IETF/IRTF Chicago 2007

  6. draft-farinacci-lisp-01.txt • Even more comments received privately and from the RAM & RRG mailing lists Jason Schiller, Lixia Zhang, Dorian Kim, Peter Schoenmaker, Darrel Lewis, Vijay Gill, Geoff Huston, David Conrad, Ron Bonica, Ted Seely, Mark Townsley, Chris Morrow, Brian Weis, Dave McGrew, Peter Lothberg, Dave Thaler, Scott Brim, Eliot Lear, Shane Amante, Ved Kafle, and Olivier Bonaventure IETF/IRTF Chicago 2007

  7. draft-farinacci-lisp-01.txt • New encapsulation format is UDP • Get through firewalls • ITR hashes on inner header to produce a source port LAG router can hash on • Can carry nonce for ETR anti-spoofing • Can carry Locator reachability bits IETF/IRTF Chicago 2007

  8. draft-farinacci-lisp-01.txt 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Identification |Flags| Fragment Offset | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port | Dest Port | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Type | Locator Reach Bits | Nonce ... | LISP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | ... Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Identification |Flags| Fragment Offset | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IETF/IRTF Chicago 2007

  9. draft-farinacci-lisp-01.txt +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| Traffic Class | Flow Label | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Payload Length | Next Header=17| Hop Limit | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | O + + u | | t + Source Routing Locator + e | | r + + | | H +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ d | | r + + | | \ + Destination Routing Locator + \ | | \ + + \ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4342 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Type=1 | Locator Reach Bits | Nonce ... | LISP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | ... Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ . . . IETF/IRTF Chicago 2007

  10. draft-farinacci-lisp-01.txt . . . +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4342 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Type=1 | Locator Reach Bits | Nonce ... | LISP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | ... Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| Traffic Class | Flow Label | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Payload Length | Next Header | Hop Limit | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | I + + n | | n + Source EID + e | | r + + | | H +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ d | | r + + | | \ + Destination EID + \ | | \ + + \ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IETF/IRTF Chicago 2007

  11. draft-farinacci-lisp-01.txt • Imperative that Locator reachability not in mapping service • To scale mapping cannot change often • ICMP Unreachables may be used • Piggyback Locator reachability in data messages • ITRs at sites know when each other are unreachable, they tell ETR • ETR (when it is an ITR) uses Locators that are reachable IETF/IRTF Chicago 2007

  12. EID-prefix: 2.0.0.0/8 Locator-set: 12.0.0.2, priority: 1, weight: 50 13.0.0.2, priority: 1, weight: 50 14.0.0.2, priority: 2, weight: 70 15.0.0.2, priority: 2, weight: 30 Mapping Entry ITR load-splits flows across 2 locators X X 2) When any site locator advertises loc-reach-bits of 0x009, only 12.0.0.2 will be used. 3) When any site locator advertises loc-reach-bits of 0x008, ony 15.0.0.2 for priority 2 is used. draft-farinacci-lisp-01.txt Ordinal assigments: 0 -> 12.0.0.2 1 -> 13.0.0.2 2 -> 14.0.0.2 3 -> 15.0.0.2 Locator reachability: 12.0.0.2 -> Up 13.0.0.2 -> Up 14.0.0.2 -> Down 15.0.0.2 -> Up Loc-reach-bits bitfield: 0x00b -> b’0000 0000 1011’ Advertised by all ITRs from site which they encapsulate anywhere 1) In this scenario, ITR load-splits equally across 12.0.0.2 and 13.0.0.2 because they are up. IETF/IRTF Chicago 2007

  13. draft-farinacci-lisp-02.txt • Published mid-July 2007 • Not in ID directory because of deadline • Fixed bugs in packet format • Added loc-reach-bits to Map-Request & Map-Reply messages • Consistent packet format with CONS • Prototype also in sync with LISP-02 IETF/IRTF Chicago 2007

  14. So what did the 3rd grader say after Steve Jobs gave an iPhone demo to the class? IETF/IRTF Chicago 2007

  15. IETF/IRTF Chicago 2007

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