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1588 over MPLS Update. draft-ietf-tictoc-1588overMPLS-02 IETF 84 (Vancouver), July 2012 Shahram Davari. Requirements. Transport 1588 messages over MPLS network Support Master, Slave, Boundary Clock and Transparent Clock at LER Support Transparent clock at LSR

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1588 over mpls update

1588 over MPLSUpdate

draft-ietf-tictoc-1588overMPLS-02

IETF 84 (Vancouver), July 2012

Shahram Davari

requirements
Requirements
  • Transport 1588 messages over MPLS network
  • Support Master, Slave, Boundary Clock and Transparent Clock at LER
  • Support Transparent clock at LSR
  • Backward compatible with non-1588-Capable LSRs
master clock at ler
Master Clock at LER

Master Clock

PTP-LSP

LER

LER

LSR1

LSR2

LSR3

(A)

(B)

LSP Label

LSP Label

IP header

PW Label

UDP header

CW

Ethernet Header

PTP Message

PTP Message

slave clock at ler
Slave Clock at LER

Slave Clock

PTP-LSP

LER

LER

LSR1

LSR2

LSR3

(A)

(B)

LSP Label

LSP Label

IP header

PW Label

UDP header

CW

Ethernet Header

PTP Message

PTP Message

boundary clock at ler

Boundary Clock

Boundary Clock at LER

Slave

Clock

Master

Clock

PTP-LSP

LER

LER

LSR1

LSR2

LSR3

(A)

(B)

(A)

(B)

IP header

Ethernet Header

LSP Label

LSP Label

UDP header

IP header

PW Label

PTP Message

UDP header

CW

PTP Message

Ethernet Header

PTP Message

PTP Message

transparent clock at ler
Transparent Clock at LER

Measure Transit

Delay

Update

Correction Field

PTP-LSP

LER

LER

LSR1

LSR2

LSR3

(A)

(B)

(A)

(B)

IP header

Ethernet Header

LSP Label

LSP Label

UDP header

IP header

PW Label

PTP Message

UDP header

CW

PTP Message

Ethernet Header

PTP Message

PTP Message

transparent clock tc at lsr
Transparent Clock (TC) at LSR

Measure Transit

Delay

Update

Correction Field

PTP-LSP

LER

LER

LSR1

LSR2

LSR3

(A)

(B)

(A)

(B)

LSP Label

LSP Label

LSP Label

LSP Label

IP header

PW Label

IP header

PW Label

UDP header

CW

UDP header

CW

Ethernet Header

Ethernet Header

PTP Message

PTP Message

PTP Message

PTP Message

backward compatibility
Backward Compatibility

Transparent

Clock

Transparent

Clock

Ingress LER Must be 1588-Capable

PTP-LSP

LER

LER

LSR1

LSR2

LSR3

1588-Capable

LER

1588-Capable

LSR

Non-1588-Capable

LSR

1588-Capable

LSR

current solution draft 02
Current Solution draft-02
  • Use standard Encapsulation
    • IP/MPLS or PW
  • Use Dedicated LSPs/PWs to carry 1588
    • To detect 1588 messages without DPI
  • PTP LSP/PW is signaled
    • RSVP-TE extension
    • LDP, BGP PW signaling extension (FFS)
  • Routers advertise their 1588-capability
    • OSPF, IS-IS extension
proposed enhancements to draft 03
Proposed Enhancements to draft-03
  • Draft-03 to only describe data plane behavior
  • Separate drafts needed for each of the Routing and Control Plane protocol enhancements
  • Make the solution more generic solution
    • Support PTP, NTP, Special Shim, etc.
  • Support Time-stamping and Correction Field update
proposed enhancements to draft 031
Proposed Enhancements to draft-03
  • Signal the following in OSPF, ISIS
    • 1588 capability per-port
  • Signal the following via LDP, BGP, RSVP-TE
    • Offset to the Timing message
    • Timing message type (PTP, NTP, Special Timing Shim, etc)
    • Action Type (TS or CF update)
status
Status
  • Draf-00 published Jan 2011
  • Draft-02 published Oct 2012
  • Draft-03 was written but not officially released
    • Plan is to release draft-03 after Vancouver meeting based on feedback from affected WGs
next step
Next Step
  • Require review and comments from:
    • TICTOC WG
    • MPLS WG
    • PWE3 WG
    • OSPF WG
    • ISIS WG
  • Publish draft-03