Extreme Networks ExtremeWare XOS 11.3, Manual

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Contents
ExtremeWare XOS 11.3 Concepts Guide
12
Delta Expression Example ..................................................................................................389
Ratio Expression Example ..................................................................................................390
Delta-Ratio Expression Example..........................................................................................392
Part 2: Using Switching and Routing Protocols
Chapter 19: Ethernet Automatic Protection Switching.................................................................... 395
Licensing ...............................................................................................................................395
Overview of the EAPS Protocol .................................................................................................395
Fast Convergence ..............................................................................................................397
Fault Detection and Recovery ...................................................................................................397
Link Down Message Sent by a Transit Node .........................................................................398
Ring Port Down Event Sent by Hardware Layer .....................................................................398
Polling .............................................................................................................................399
Restoration Operations.......................................................................................................399
Multiple EAPS Domains...........................................................................................................400
EAPS Data VLAN Spanning Two Rings Connected by One Switch...........................................400
Multiple EAPS Domains per Ring—Spatial Reuse.................................................................401
Multiple EAPS Rings Sharing a Common Link ......................................................................402
Configuring EAPS on a Switch ..................................................................................................403
Creating and Deleting an EAPS Domain...............................................................................404
Defining the EAPS Mode of the Switch................................................................................404
Configuring EAPS Polling Timers ........................................................................................405
Configuring the Primary and Secondary Ports .......................................................................406
Configuring the EAPS Control VLAN ....................................................................................406
Configuring the EAPS Protected VLANs ...............................................................................407
Enabling and Disabling Fast Convergence ............................................................................407
Enabling and Disabling an EAPS Domain.............................................................................407
Enabling and Disabling EAPS on the Switch ........................................................................407
Unconfiguring an EAPS Ring Port .......................................................................................408
Displaying EAPS Status Information....................................................................................408
Configuring EAPS Shared Ports ................................................................................................411
Steady State .....................................................................................................................412
Common Link Failures .......................................................................................................412
Flushing the FDBs.............................................................................................................414
Creating and Deleting a Shared Port....................................................................................414
Defining the Mode of the Shared Port..................................................................................414
Configuring the Link ID of the Shared Port...........................................................................414
Configuring the Shared Port Segment Timer.........................................................................415
Unconfiguring an EAPS Shared Port....................................................................................415
Displaying EAPS Shared-Port Status Information..................................................................415
EAPS Shared Port Configuration Rules ......................................................................................418
EAPS Shared Port Configuration Examples ................................................................................419
Basic Configuration ...........................................................................................................419
Basic Core Configuration....................................................................................................419
Right Angle Configuration ..................................................................................................420
Combined Basic Core and Right Angle Configuration ............................................................420
Large Core and Access Rings Configuration..........................................................................421
Advanced Configuration .....................................................................................................422