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Juan Carlos Zúñiga Akbar Rahman Luis M. Contreras Carlos J. Bernardos Ignacio Soto IETF 79, November 2010. Dedicated Multicast LMA. Dedicated Multicast LMA (1/2). Joint draft = draft-zuniga + draft- contreras - msd Basic concept discussed since IETF 76 (Hiroshima)

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Juan Carlos ZúñigaAkbar RahmanLuis M. ContrerasCarlos J. BernardosIgnacio SotoIETF 79, November 2010

Dedicated

Multicast LMA

dedicated multicast lma 1 2
Dedicated Multicast LMA (1/2)
  • Joint draft = draft-zuniga + draft-contreras-msd
    • Basic concept discussed since IETF 76 (Hiroshima)
  • All concepts and comments addressed now in this draft
    • https://datatracker.ietf.org/doc/draft-zuniga-multimob-smspmip/
  • Scope of Changes:
    • New sections on deployment scenarios
    • Multicast LMA definitions and terminology updated
    • PMIP enhancements:
      • Binding Update
      • Policy Profile
      • MAG to LMA attach requirements
dedicated multicast lma 2 2
Dedicated Multicast LMA (2/2)
  • Advantages
    • Not all LMAs need to support multicast capability and connectivity
      • Reduces total resources and states at LMAs
      • Reduces tunnel convergence issue at the MAG
      • Minimizes the replication of multicast traffic when MNs with different LMAs join the same multicast group
    • Simplifies the multicast tree topology
      • allows a PMIPv6 domain to closely follow a simple multicast tree topology for Proxy MLD forwarding
    • Allows the implementation of a single MLD proxy instance per MAG to support the multicast service
      • Reduces the complexity of the MAG
    • Permits different PMIPv6 deployment scenarios
      • Deployment strategies can be tailored for expected traffic scenarios
several unicast pmipv6 domains served by one multicast lma relationship n 1

Multicast tree

M-LMA

U-LMA

U-LMA

Multicast

area

Unicast

area

Unicast

area

MAG1

MAG2

MAG3

MAG4

MAG5

Several unicast PMIPv6 domains served by one Multicast LMA (relationship N:1)
  • Suited for / Potential benefits:
  • Initial scenario for network deployment (scalable approach)
  • Reduced multicast tree size in core network and/or centralized content distribution
  • Adapted to low multicast-MN customer base (multicast equipment synergy, shared for high number of customers)

Unicast flow

Multicast flow

one unicast pmipv6 domain served by several multicast lmas relationship 1 n
One unicast PMIPv6 domain served by several Multicast LMAs (relationship 1:N)
  • Suited for / Potential benefits:
  • Service differentiation: distinct content providers, transport technology (IPv4/v6), content type (premium vs non-premium), etc
  • Load balance, redundancy
  • Topological efficiency (best route to content source) [only if MAG implements multicast router capabilities]
  • Adaptability to multicast tree dynamics in core network
  • (very) High multicast MN customer base [no overlapping areas]

Multicast tree

U-LMA

Multicast tree

M-LMA

M-LMA

Multicast

area

Multicast

area

MLD proxy

Instance #2

MLD proxy

Instance #1

Unicast

area

Unicast flow

Multicast flow

MAG1

MAG2

MAG3

MAG4

MAG5

several unicast pmipv6 domains served by one multicast lma relationship n 1 with hybrid lma
Several unicast PMIPv6 domains served by one Multicast LMA (relationship N:1) with Hybrid LMA

Multicast tree

HybridLMA

U-LMA

Multicast

area

Unicast

area

Unicast

area

MAG1

MAG2

MAG3

MAG4

MAG5

Unicast flow

Multicast flow