Table of Contents

4-Byte Autonomous System Numbers Overview
Juniper Networks Implementation of 4-Byte Autonomous System Numbers
Configuring 4-Byte Autonomous System Numbers
Establishing a Peer Relationship Between a 4-Byte Capable Router and a 2-Byte Capable Router Using a 2-Byte AS Number
Establishing a Peer Relationship Between a 4-Byte Capable Router and a 2-Byte Capable Router Using a 4-Byte AS Number
Understanding a 4-Byte Capable Router AS Path Through a 2-Byte Capable Domain
Prepending 4-Byte AS Numbers in an AS Path
Understanding 4-Byte AS Numbers and Route Distinguishers
Configuring 4-Byte AS Numbers and BGP Extended Community Attributes
Understanding 4-Byte AS Numbers and Route Loop Detection