Procedures%20for%20Dynamically%20Signaled%20Hierarchical%20Label%20Switched%20Paths%20draft-ietf-ccamp-lsp-hierarchy-bis-01.txt - PowerPoint PPT Presentation

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Procedures%20for%20Dynamically%20Signaled%20Hierarchical%20Label%20Switched%20Paths%20draft-ietf-ccamp-lsp-hierarchy-bis-01.txt

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Title: Procedures%20for%20Dynamically%20Signaled%20Hierarchical%20Label%20Switched%20Paths%20draft-ietf-ccamp-lsp-hierarchy-bis-01.txt


1
Procedures for Dynamically Signaled Hierarchical
Label Switched Pathsdraft-ietf-ccamp-lsp-hierarc
hy-bis-01.txt
  • Nov. 6, 2006
  • Kohei Shiomoto, Richard Rabbat
  • Arthi Ayyangar, Adrian Farrel, Zafar Ali

2
Goal of this ID
  • How to let the egress node know that an FA-LSP
    needs to be advertised as an FA, or as a RA, or
    only to be locally used.
  • Equally applicable to both numbered and
    unnumbered TE links.
  • Identify the routing instance in which the
    TE-link should be advertised.

Ingress (RTR-IDa)
Egress (RTR-IDb)
TE-link
TE-LINK-IDx
TE-LINK-IDy
TE-LINK-IDx R,F TII
LSP_TUNNEL_INTERFACE_ID Object
TE-LINK-IDy R,F TII
3
Document status
  • (Re)-defined LSP_TUNNEL_INTERFACE_ID Object
  • R-bit
  • F-bit
  • Target IGP Instance ID
  • To do
  • Support of bundled link

4
Support of bundled link
  • A newly established LSP constitutes a component
    link of the bundle.
  • The component link id has to be exchanged.
  • Association between the component link and the
    bundled TE-link is made.

Ingress (RTR-IDa)
Egress (RTR-IDb)
TE-LINK-IDx
TE-LINK-IDy
TE-link
COMPONENT-LINK-IDi
COMPONENT-LINK-IDj
5
Next step
  • Add treatment for bundled link.
  • Solicit feedback from the WG.

6
Backup slides
7
Coding of R,F bits
R,F Behavior
0,0 neither the FA nor RA (used as a local link)
0,1 only advertised as FA
1,0 only advertised as RA
1,1 advertised as RA in both IP and MPLS-TE topologies
this table applies to bi-directional LSP only
8
Target IGP Instance
IGP instance 1
IGP instance 0
Ingress (RTR-IDa)
Egress (RTR-IDb)
TE-link
TE-LINK-IDx
TE-LINK-IDy
TE-LINK-IDx R,F TII1
LSP_TUNNEL_INTERFACE_ID Object
TE-LINK-IDy R,F TII1
9
Existing mechanism forNumbered TE-link
Ingress (RTR-IDa)
Egress (RTR-IDb)
TE-link
TE-LINK-IDx
Sender Template object
tunnel sender address x
TE-LINK-IDx where x /31 address of x
LSA RTR-IDa LINK-IDb
LSP_TBL
ingress egress TE-LINK-ID
Search for a
LSA RTR-IDb LINK-IDa
a b x
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