Extreme Networks ExtremeWare XOS Guide Manual page 12

Contents
Advanced ESRP Features.........................................................................................................339
ESRP Tracking..................................................................................................................339
ESRP Port Restart .............................................................................................................342
ESRP Host Attach .............................................................................................................342
ESRP Port Weight and Don't Count .....................................................................................343
ESRP Groups ....................................................................................................................344
Displaying ESRP Information ...................................................................................................345
Using ELRP with ESRP............................................................................................................345
Using ELRP with ESRP to Recover Loops ............................................................................346
Configuring ELRP..............................................................................................................346
Displaying ELRP Information..............................................................................................347
ESRP Examples ......................................................................................................................348
Single Domain Using Layer 2 and Layer 3 Redundancy.........................................................348
Multiple Domains Using Layer 2 and Layer 3 Redundancy ....................................................351
ESRP Cautions .......................................................................................................................353
Configuring ESRP and IP Multinetting.................................................................................353
ESRP and STP..................................................................................................................353
ESRP and VRRP ...............................................................................................................353
ESRP Groups and Host Attach............................................................................................353
Port Configurations and ESRP ............................................................................................353
Chapter 18: Virtual Router Redundancy Protocol........................................................................... 355
Overview ................................................................................................................................355
Determining the VRRP Master ..................................................................................................355
VRRP Tracking..................................................................................................................356
Electing the Master Router.................................................................................................358
Additional VRRP Highlights......................................................................................................358
VRRP Operation ......................................................................................................................359
Simple VRRP Network Configuration ...................................................................................359
Fully Redundant VRRP Network..........................................................................................360
VRRP Configuration Parameters................................................................................................361
VRRP Examples ......................................................................................................................362
Configuring the Simple VRRP Network ................................................................................362
Configuring the Fully Redundant VRRP Network...................................................................363
VRRP Cautions .......................................................................................................................364
Assigning Multiple Virtual IP Addresses...............................................................................364
VRRP and ESRP ...............................................................................................................364
Chapter 19: IP Unicast Routing .................................................................................................... 365
Overview of IP Unicast Routing.................................................................................................365
Router Interfaces ..............................................................................................................365
Populating the Routing Table .............................................................................................366
Proxy ARP ..............................................................................................................................368
ARP-Incapable Devices ......................................................................................................368
Proxy ARP Between Subnets ..............................................................................................369
Relative Route Priorities ..........................................................................................................369
Configuring IP Unicast Routing ................................................................................................370
Verifying the IP Unicast Routing Configuration...........................................................................370
Routing Configuration Example.................................................................................................370
ExtremeWare XOS 11.1 Concepts Guide
12