Cisco Cisco IOS Software Release 12.2(14)ZA

Other RADIUS-aware flow gateways. These gateways are proxies or routing nodes that receive 
RADIUS Authorization and Accounting requests for users that route flows through the 
gateways. The Exchange Director binds the RADIUS and data flows to the same gateway, 
ensuring that the gateway receives a complete and consistent view of the network activity for 
the user.

The Exchange Director also adds the following features:

Enhanced failover capabilities for single-chassis failover within the CMX for Catalyst 6500 Family 
Switches and Cisco 7600 Internet Routers. When used with Route Processor Redundancy Plus 
(RPR+), IOS SLB stateful backup for redundant route processors provides full IOS SLB stateful 
failover for these platforms.

Flow persistence, which provides intelligent return routing of load-balanced IP flows.

 illustrates a logical view of a simple IOS SLB network.

This section describes the general features provided by IOS SLB, as well as the specific features 
provided by the Exchange Director for Cisco Mobile Exchange (CMX).

Some IOS SLB features are specific to a single platform and are not described in this feature document. 
For information about those features, refer to the appropriate platform-specific documentation.

Client

Client

Client

Client

IOS SLB
device

Real

server

Real

server

Virtual server

Real

server

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