3Com Router 3000 Ethernet FamilyConfiguration Guide Table of Contents3Com CorporationiTable of ContentsChapter 1 Reliability Overview..................................................................................................... 1-11.1 Introduction to Reliability.................................................................................................... 1-1Chapter 2 Backup Center Configurations................................................................................... 2-12.1 Introduction to Backup Center ........................................................................................... 2-12.2 Backup Center Configurations........................................................................................... 2-12.2.1 Entering the View of a Main Interface ..................................................................... 2-22.2.2 Assigning Backup Interfaces with Priorities to the Main Interface .......................... 2-22.2.3 Setting Failover and Fallback Delays...................................................................... 2-32.2.4 Configuring Routes on the Main and Backup Interfaces ........................................ 2-32.2.5 Configuring the Warmup Timer ............................................................................... 2-42.2.6 Configuring Backup Load Sharing .......................................................................... 2-42.2.7 Setting Backup Bandwidth of the Main Interface .................................................... 2-42.2.8 Configuring Flow Check Interval ............................................................................. 2-52.3 Displaying and Debugging the Backup Center.................................................................. 2-52.4 Backup Center Configuration Example ............................................................................. 2-62.4.1 Configuring Backup between Physical Interfaces................................................... 2-62.4.2 Configuring Multiple Backup Interfaces .................................................................. 2-62.4.3 Configuring Dial-up Backup to the ADSL................................................................ 2-7Chapter 3 VRRP Configurations .................................................................................................. 3-13.1 Introduction to VRRP ......................................................................................................... 3-13.2 VRRP Configurations......................................................................................................... 3-23.2.1 Enabling/Disabling Virtual IP Address Pinging ....................................................... 3-33.2.2 Adding or Deleting a Virtual IP Address.................................................................. 3-33.2.3 Configuring Router Priority in a Standby Group...................................................... 3-43.2.4 Configuring Preemption Mode and Preemption Delay............................................ 3-53.2.5 Configuring Authentication Mode and Authentication Key...................................... 3-53.2.6 Configuring the Adver_Timer of VRRP ................................................................... 3-63.2.7 Configuring Interface Tracking ................................................................................ 3-73.2.8 Configuring TTL Check on VRRP Packets ............................................................. 3-83.3 Displaying and Debugging VRRP...................................................................................... 3-83.4 VRRP Configuration Example ........................................................................................... 3-93.4.1 Configuring a Single VRRP Standby Group ........................................................... 3-93.4.2 Configuring Interface Tracking .............................................................................. 3-103.4.3 Configuring Multiple Standby Groups ................................................................... 3-113.5 VRRP Troubleshooting .................................................................................................... 3-12
