Avaya Cajun P882 User Manual page 256

Chapter 7
Virtual Router
Redundancy
Protocol (VRRP)
Hunt Groups
Redundant
Power Supplies
Supervisor
Failover
conditions
Chapter
Contents
7-2
The Avaya Multiservice Switch supports Virtual Router Redundancy
Protocol (VRRP), an IETF protocol designed to support redundant
LAN routers, as well as load balancing of traffic. VRRP is transparent
to host end stations. All configurations are done at the Avaya
Multiservice Switch, no additional end station configurations are
required. See the "Virtual Router Redundancy Protocol (VRRP)"
section in Chapter 9, "Configuring IP Routing", for more details.
Ports within a Hunt Group by default are redundant to one another
since Hunt Groups perform load balancing among the ports. The
Hunt Group load-shares the traffic between two switches allowing
the bandwidth to be multiplied. The use of Hunt Groups also
increases reliability since the links behave as hot standby links to
one another. If the traffic is shared over multiple links, and one of
the links is "lost", the traffic will be automatically redistributed over
the other links and the communications will continue without
interruption See the "Hunt Groups" section in Chapter 4, "Using
VLANs, Spanning Tree, Hunt Groups, and VTP Snooping" for more
details.
Only two power supplies are required to support a fully-loaded
Avaya Multiservice Switch. A third power supply can be installed to
provide backup should one of the other two fail. The power
subsystem provides N+1 power supply redundancy.
The Active supervisor module fails over to the standby supervisor if
one of the following events occur:
Active Supervisor module removal
—
Active Supervisor Software reset
—
Active Supervisor Module Reset Push button
—
Active Supervisor loses power
—
Active Supervisor system crash either hardware or
—
software
The following information and procedures are provided in this
chapter:
Configuring Redundant Hardware
Installing and Enabling Redundant Hardware
Replacing the Primary Controller
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1