Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 321)

Brocade Virtual ADX Server Load Balancing Guide 305
53-1003247-01
Chapters the
6
Hot Standby High Availability
Overview
This chapter describes the Hot Standby high availability (HA) feature for the Brocade Virtual ADX. In
Hot Standby HA, two Brocade Virtual ADX devices must be in a network that you configure to serve
as a redundant pair (primary and secondary). One Brocade Virtual ADX is always active while the
other Brocade Virtual ADX is always standby (idle).
If the active Brocade Virtual ADX fails, the idle standby Brocade Virtual ADX assumes the active
duties and becomes the new active device. The active and standby Brocade Virtual ADX devices
remain in their states until one of the following events forces a change in their status:
• An increase or decrease in the count of the router ports plus the server ports on each Brocade
Virtual ADX. The Brocade Virtual ADX with the highest number of active ports is declared the
active device.
• Failure of any BP or MP forcing the Brocade Virtual ADX to reload.
• A reload.
For more information on the failover behavior of Hot-standby HA, refer to the “Hot Standby HA
protocol operations” section.
NOTE
The Hot Standby HA feature is supported for IPV4 and IPv6.