User guide

Contents
vi OmniSwitch AOS Release 7 Advanced Routing Guide March 2015
Regular Expressions ........................................................................................4-13
Route Dampening ...................................................................................................4-16
CIDR Route Notation .............................................................................................4-16
BGP Configuration Overview .......................................................................................4-17
Starting BGP .................................................................................................................4-18
Disabling BGP ........................................................................................................4-18
Setting Global BGP Parameters ....................................................................................4-20
Setting the Router AS Number ...............................................................................4-21
Setting the Default Local Preference .....................................................................4-21
Enabling AS Path Comparison ...............................................................................4-22
Controlling the use of MED Values .......................................................................4-23
Synchronizing BGP and IGP Routes .....................................................................4-24
Displaying Global BGP Parameters .......................................................................4-25
Configuring a BGP Peer ................................................................................................4-26
Creating a Peer .......................................................................................................4-28
Restarting a Peer .....................................................................................................4-29
Setting the Peer Auto Restart .................................................................................4-29
Changing the Local Router Address for a Peer Session .........................................4-30
Clearing Statistics for a Peer ..................................................................................4-30
Setting Peer Authentication ....................................................................................4-31
Configuring the advertising of IPv4 routes for an IP BGP peer ............................4-31
Setting the Peer Route Advertisement Interval ......................................................4-31
Configuring a BGP Peer with the Loopback0 Interface ..................................4-31
Configuring Aggregate Routes .....................................................................................4-33
Configuring Local Routes (Networks) ..........................................................................4-34
Adding the Network ........................................................................................4-34
Configuring Network Parameters ....................................................................4-35
Viewing Network Settings ..............................................................................4-36
Controlling Route Flapping Through Route Dampening ..............................................4-37
Example: Flapping Route Suppressed, then Unsuppressed ............................4-37
Enabling Route Dampening ............................................................................4-38
Configuring Dampening Parameters ...............................................................4-38
Clearing the History ........................................................................................4-40
Displaying Dampening Settings and Statistics ................................................4-40
Setting Up Route Reflection .........................................................................................4-41
Configuring Route Reflection ................................................................................4-43
Redundant Route Reflectors ...................................................................................4-43
Working with Communities ..........................................................................................4-45
Creating a Confederation ..............................................................................................4-46
Configuring Redistribution ...........................................................................................4-47
Using Route Maps ...........................................................................................4-47
Configuring Route Map Redistribution ...........................................................4-51
Route Map Redistribution Example ................................................................4-52
Configuring Redundant CMMs for Graceful Restart .............................................4-53
Application Example .....................................................................................................4-54
AS 100 .............................................................................................................4-54