I tag
This presentation is the property of its rightful owner.
Sponsored Links
1 / 7

I-TAG PowerPoint PPT Presentation


  • 69 Views
  • Uploaded on
  • Presentation posted in: General

I-TAG. A multiplexing tag for service instance scaling in Provider Bridged Networks Mick Seaman [email protected] I-TAG. Purpose Architecture Format Context. ITAG : Purpose. Allow upto 2 20 service instances in a PBN Particularly to address the E-LINE reqmt

Download Presentation

I-TAG

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


I tag

I-TAG

A multiplexing tag forservice instance scalingin Provider Bridged Networks

Mick Seaman

[email protected]


I tag1

I-TAG

  • Purpose

  • Architecture

  • Format

  • Context

Service instance multiplexing


Itag purpose

ITAG : Purpose

  • Allow upto 220 service instances in a PBN

    • Particularly to address the E-LINE reqmt

    • Use for E-LAN, E-TREE optional/as reqd(more later on benefits of choice)

  • Leverages existing solutions

    • Complements .1Q, .1ad, .1D

    • GVRP, GMRP

  • No major new protocols required for scaling

Service instance multiplexing


Itag architecture

ITAG : Architecture

I-tagging systems are “end-stations” on a provider backbone or core network.

The backbone can be either bridged (.1D) or virtual bridged (.1Q /.1ad)

If backbone is .1Q then tagging, detagging (ingress and egress) rules are exactly as they are today

Tag can be added/not added and tag value dependent on frame C-VID just as for “dual bridge model” in .1Q

<<see Paul Bottorff’s slides from Monday for diagram>>

Service instance multiplexing


I tag format 1

I-TAG : Format (1)

  • I-TAG EtherType (16 bits)

  • I-TAG TCI (Tag Control Info, i.e. version, flags8 bits)

  • PRI/DE (priority, drop eligible 4 bits)

  • SID (Service Instance ID – 20 bits)

  • User DA (Destn. Address of conveyed ‘frame’ – 48 bits)

  • User SA (Source Address of conveyed ‘frame’ – 48 bits)

    16 + 128 bits total

Service instance multiplexing


I tag format 2

I-TAG : Format (2)

Service instance multiplexing


I tag context

I-TAG : Context

Service instance multiplexing


  • Login