Abstract: IS-IS Deployment & Design Guidelines, with Emphasis on New Features

Shankar Vemulapalli, Cisco

Level: intermediate
 The presentation discusses IS-IS deployment scenarios (L1-Only, L2-Only, L1 & L2 with route-leaking), design consisderations, and features that have been added recently to the IS-IS protocol, such as route-leaking, route-tags, and extensions to MPLS-TE.

An outline follows:

  • Introduction
    • Agenda
    • Scope of the presentation
  • Depoloyment Scenarios
    • L1-Only
    • L2-Only
    • L1 & L2 with Route-Leaking
    Design Considerations
    • Set overload bit
    • LSP flooding
    • Exponential back-off
    • SPF, PRC, LSP generation
    • Hello padding
    • Database timers
    • Non-adverstisement of parallel adjacencies in the LSP
  • New Features
    • Route-leaking
    • Extensions to MPLS-TE
    • Fast hellos
    • dCEF and IS-IS
    • Route-tags
    • p2p adjancencies over broadcast media
  • Suggested reading


    • About the Presenter
    Shankar Vemulapalli is a Technical Lead in the Internet Service Provider Support Group at Cisco, involved in designing large-scale ISP networks with an emphasis on IS-IS. His other areas of interest include OSPF, EIGRP, MPLS-TE, and MPLS-VPNs. Vemulapalli has written several IS-IS documents for the Cisco web site, and has also served as a CCIE Lab Proctor.

    PowerPoint presentation
    HTML presentation
    RealVideo stream