User guide

Contents
OmniSwitch AOS Release 7 Advanced Routing Guide March 2015 v
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 ............................................................................3-15
Activating IS-IS ......................................................................................................3-15
Creating an IS-IS Area ID ......................................................................................3-16
Activate IPv4 or IPv6 Routing ...............................................................................3-16
Creating IS-IS Circuit .............................................................................................3-16
Configuring the IS-IS Level ...................................................................................3-17
Enabling Summarization ........................................................................................3-18
Enabling IS-IS Authentication ...............................................................................3-19
Modifying IS-IS Circuit Parameters ......................................................................3-22
Configuring Redistribution Using Route Maps .....................................................3-23
Using Route Maps ...........................................................................................3-24
Configuring Route Map Redistribution ...........................................................3-27
Route Map Redistribution Example ................................................................3-28
Configuring Router Capabilities ............................................................................3-30
Configuring Redundant Switches in a Stack for Graceful Restart .........................3-30
IS-IS Application Example ...........................................................................................3-31
Step 1: Prepare the Routers .............................................................................3-31
Step 2: Enable IS-IS ........................................................................................3-32
Step 3: Create and Enable Area ID ..................................................................3-32
Step 4: Configuring IS-IS Level Capability ....................................................3-32
Step 5: Enabling IS-IS on VLAN ....................................................................3-32
Step 6: Examine the Network ..........................................................................3-33
Multi-Topology IS-IS Overview ...................................................................................3-34
M-ISIS Operation ...................................................................................................3-34
Enabling M-ISIS Capability ...................................................................................3-34
Verify M-ISIS Configuration ..........................................................................3-35
M-ISIS Configuration Scenario .............................................................................3-35
Verifying IS-IS Configuration ......................................................................................3-36
Chapter 4 Configuring BGP .........................................................................................................4-1
In This Chapter ................................................................................................................4-2
BGP Specifications ........................................................................................................4-3
Quick Steps for Using BGP ............................................................................................4-4
BGP Overview ................................................................................................................4-5
Autonomous Systems (ASs) .....................................................................................4-6
BGP 4-Octet Autonomous System Number (ASN) ..........................................4-6
Internal vs. External BGP .........................................................................................4-8
Communities ............................................................................................................4-9
Route Reflectors .....................................................................................................4-10
BGP Confederations ...............................................................................................4-11
Policies ...................................................................................................................4-12