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OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide December 2007 v
Chapter 3 Configuring IS-IS ........................................................................................................3-1
In This Chapter ................................................................................................................3-1
IS-IS Specifications .........................................................................................................3-2
IS-IS Defaults Table ........................................................................................................3-3
IS-IS Quick Steps ............................................................................................................3-5
IS-IS Overview ................................................................................................................3-8
IS-IS Packet Types .................................................................................................3-10
IS-IS Areas .............................................................................................................3-10
Graceful Restart on Stacks with Redundant Switches ...........................................3-12
Configuring IS-IS ..........................................................................................................3-14
Preparing the Network for IS-IS ............................................................................3-14
Activating IS-IS ......................................................................................................3-15
Creating an IS-IS Area ID ......................................................................................3-16
Creating IS-IS Interfaces ........................................................................................3-16
Configuring the IS-IS Level ...................................................................................3-16
Enabling Summarization ........................................................................................3-18
Enabling IS-IS Authentication ...............................................................................3-18
Modifying Interface Parameters .............................................................................3-22
Configuring Redistribution Using Route Maps .....................................................3-24
Using Route Maps ...........................................................................................3-24
Configuring Route Map Redistribution ...........................................................3-28
Route Map Redistribution Example ................................................................3-29
Configuring Router Capabilities ............................................................................3-30
Configuring Redundant Switches in a Stack for Graceful Restart .........................3-31
IS-IS Application Example ...........................................................................................3-32
Step 1: Prepare the Routers .............................................................................3-32
Step 2: Enable IS-IS ........................................................................................3-33
Step 3: Create and Enable Area ID ..................................................................3-33
Step 4: Configuring IS-IS Level Capability ....................................................3-33
Step 5: Create, Enable, and Assign Interfaces .................................................3-33
Step 6: Examine the Network ..........................................................................3-34
Verifying IS-IS Configuration ......................................................................................3-34
Chapter 4 Configuring BGP .........................................................................................................4-1
In This Chapter .........................................................................................................4-1
BGP Specifications ........................................................................................................4-3
Quick Steps for Using BGP ............................................................................................4-4
BGP Overview ................................................................................................................4-5
Autonomous Systems (ASs) .....................................................................................4-6
Internal vs. External BGP .........................................................................................4-7
Communities ............................................................................................................4-8
Route Reflectors .......................................................................................................4-9
BGP Confederations ...............................................................................................4-11
Policies ...................................................................................................................4-12
Regular Expressions ........................................................................................4-13
The Route Selection Process ..................................................................................4-16