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10-1
365-360-001R6.0
Issue 1, December 2008
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10 Configuring 8950 AAA
USSv2
Overview
Purpose
This chapter discusses the process of configuring the 8950 AAA USSv2 functionality.
The following topics are included in this chapter:
USSv2 Configuration
The Universal State Server (USS) and Universal State Server version 2 (USSv2)
The Universal State Server (USS) is an in-memory database optimized to track network-
resource usage. It interacts with the 8950 AAA Server to maintain usage counts and
enforce resource limits within the network.
The Universal State Server version 2 (USSv2) Configuration feature is an advanced
feature of the USS feature. The USSv2 is a brand new design and in many ways different
from the USS feature though the basic concepts are same. The new USSv2 is not built on
the old USS.
The USSv2 differs from the old USS as following:
• USSv2 is a replication and persistence handling framework that allows
“pluggable” state machines.
• USSv2 can handle any number of instances of state machines of the same or
different types, each with its own database and set of replication hosts.
• USSv2 replicates in active-active mode and all hosts in a replication domain can
service requests at any time.
USSv2 Configuration 10-1