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LISP Traffic Engineering

LISP Traffic Engineering. draft-farinacci-lisp-te- 01 Dino Farinacci Cisco Systems Parantap Lahiri Microsoft Corporation Michael Kowal Cisco Systems. Problem Statement. LISP provides data-path stretch = 1 When encapsulating from ITR to ETR What if stretch = 1 path is congested?

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LISP Traffic Engineering

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  1. LISP Traffic Engineering draft-farinacci-lisp-te-01 Dino Farinacci Cisco Systems Parantap Lahiri Microsoft Corporation Michael Kowal Cisco Systems

  2. Problem Statement • LISP provides data-path stretch = 1 • When encapsulating from ITR to ETR • What if stretch = 1 path is congested? • Could we hair-pin as a feature? • To find a better performing data path

  3. ETR ITR Re-Encapsulation Points A D X Y B C RTR ‘Y’ decaps packet and performs lookup on dest EID for ELP (if not cached) RTR ‘Y’ encaps packet to ETR EID-prefix: 2001:db8:2::/48 Locator-set: (x,y,ETR): priority 1, weight 100 EID-prefix: 2001:db8:2::/48 Locator-set: (x,y,ETR): priority 1, weight 100 RTR ‘X’ decaps packet and performs lookup on dest EID for ELP (if not cached) EID-prefix: 2001:db8:2::/48 Locator-set: (x,y,ETR): priority 1, weight 100 ELPs provisioned via Programmable Interface ITR encapsulates to RLOC ‘X’ EID RLOCa.a.a.0/24 w.x.y.1 b.b.b.0/24 x.y.w.2 c.c.c.0/24 z.q.r.5 d.d.0.0/16 z.q.r.5 EID RLOCa.a.a.0/24 w.x.y.1 b.b.b.0/24 x.y.w.2 c.c.c.0/24 z.q.r.5 d.d.0.0/16 z.q.r.5 EID RLOCa.a.a.0/24 w.x.y.1 b.b.b.0/24 x.y.w.2 c.c.c.0/24 z.q.r.5 d.d.0.0/16 z.q.r.5 MS/MR RTR RTR § LISP encapsulation

  4. ETR ITR Recursion X E F Y B D A C EID-prefix: RTR-Y Locator-set: (e,f,y): priority 1, weight 100 (y) : priority 2, weight 100 EID-prefix: ETR Locator-set: (x,e,f,y,ETR): priority 1, weight 100 (x,y,ETR): priority 2, weight 100 RTR ‘X’ performs lookup on ETR ‘ETR’ L-bit setting for ‘Y’ determines: re-encap or lookup RTR RTR RTR RTR § LISP encapsulation

  5. Service Chaining dEID sEID Service Chain described by ELP RTR ITR ETR RTR Scrubber Service described by EID in mapping database Honey-pot Deep Packet Inspection

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