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xvi
C O N T E N T S
External Health Checking ........................................ 374
Health Checks for Web Cache Redirection and Policy
Based Routing ......................................................... 375
Layer 4 Flows .......................................................... 376
Policy-Based Routing with Route Load-Sharing...... 376
Layer 4 Destination Port .......................................... 376
Maintenance Mode ......................................................377
Persistence ..................................................................377
Client Persistence.................................................... 377
SLB Proxy Client Persistence ..................................377
Sticky Persistence ................................................... 378
Server Load Balancing with ESRP ............................378
Configuring the Switches for SLB and ESRP .......... 380
Combined SLB and ESRP failover .......................... 381
Configuration of SLB with ESRP ............................. 382
Web-Server Configuration ....................................... 382
Using High Availability System Features ..................382
Redundant SLB ....................................................... 383
Using Ping-Check.................................................... 383
Configuring Active-Active Operation........................ 383
Sample Active-Active Configuration ........................384
Using Manual Fail-Back........................................... 387
Using SLB High Availability ..................................... 387
Configuring Clients ..................................................388
Configuring Switches for SLB H/A ...........................388
Notes on Configuring SLB H/A ................................390
Web Server configuration ........................................391
Advanced SLB Commands ........................................392
Web Cache Redirection ..............................................398
Flow Redirection...................................................... 398
Precedence of Flow Redirection Rules ................... 399
Flow Redirection Commands .................................. 400
Flow Redirection Example....................................... 401
19: Status Monitoring and Statistics .....
403
Status Monitoring ........................................................ 403
Port Statistics ..............................................................405
Port Errors ...................................................................406