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

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

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beyond their own AS boundaries. or multiple ASes within their own admin domain ... Allow for traffic optimization and path protection /restoration beyond AS boundaries ... – PowerPoint PPT presentation

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


1
Inter-AS MPLS TE Requirements draft-zhang-mpls-int
eras-te-req-00.txt
Raymond Zhang, INFONET Kenji Kumaki, KDDI JP
Vasseur, Cisco Paul Mabey, Qwest Nadim
Constantine, INFONET
2
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.

3
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

4
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
5
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
6
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

7
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

8
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

9
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
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