Inter-AS%20MPLS%20TE%20Requirements%20draft-zhang-mpls-interas-te-req-00.txt

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Inter-AS MPLS TE Requirementsdraft-zhang-mpls-int
eras-te-req-00.txt
Raymond Zhang, INFONET Kenji Kumaki, KDDI JP
Vasseur, Cisco Paul Mabey, Qwest Nadim
Constantine, INFONET
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Overview of the Draft

• TE WG Charter
• The working group may also consider the
  problems of traffic engineering across autonomous
  systems boundaries
• This requirements draft is driven by SPs with
  MPLS TE needs
• beyond their own AS boundaries
• or multiple ASes within their own admin domain
• Currently several major SPs, such as INFONET,
  KDDI, Qwest, are in support of this draft.

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Overview of the Draft

• Problems and Requirements
• Issues with BGP-based inter-as routing policies
• Sub-optimum routing
• Un-deterministic traffic condition changes
• It is rather difficult to do transmission
  resource optimization across different ASes for
  stricter QoS requirements.
• Inter-AS traffic cannot be fast protected in case
  of ASBR failure or inter-AS link failure
• Need to extend intra-AS TE into multiple ASes

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Overview of the Draft

• Application Scenarios Extended or Virtual POP

CE2 VPN-Mars
SP1 (GSP)
Inter-AS DS-TE for Extended trunking
ASBR
CE1 VPN-Mars
CE3 VPN-Mars
ASBR
SP2 (RSP)
V-POP RTR
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Overview of the Draft

• Application Scenarios End-to-End Inter-AS
  MPLS/TE (CE-CE)

CE2 VPN-Mars
SP1 (GSP)
E2E Inter-AS DS-TE
ASBR
CE1 VPN-Mars
ASBR
CE3 VPN-Mars
SP2 (RSP)
PE
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Overview of the Draft

• Other Application Scenarios
• Deployment of Inter-AS TE in SPs multi-AS
  network
• Allow for traffic optimization and path
  protection /restoration beyond AS boundaries
• Transit AS TE paths
• Utilize other SPs network as either primary or
  backup paths via inter-AS TE with FRR across AS
  boundaries

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Overview of the Draft

• Major Detailed Requirements
• Interoperable with current intra-AS MPLS TE
  operations, e.g. provisioning and mgnt.
• DS-TE Support
• Diverse routing and FRR
• Path signaling and computations
• Support for LSP aggregations
• Inter-AS confidentiality and policy control

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Overview of the Draft

• Evaluation Criteria
• Should satisfy detailed requirements
• Scalability and extensibility
• Performance
• Backward compatibility
• Security Considerations
• Inter-AS trust model
• Policy control
• Others

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Conclusion

• We would like to invite comments from other SPs
• Already 4 SPs are seeing concrete requirements
• Equant has recently joined the draft
• We would like to propose the TE WG to adopt this
  draft as a WG document