# AAA Server Statistics- Server Availability

The AAA Server Statistics- server availability, allows comparison of various statistical details among the servers.

## Procedure

1. Right-click the device, then select AAA.

2. Click Statistics Summary, then click Server Availability.

The following information appears:

> Index (casIndex)

> Protocol (casProtocol)

> IP Address (casAddress)

> Curr State (casState)

> Curr State Duration (casCurrentStateDuration)

> Prev State Duration (casPreviousStateDuration)

> Total Dead Time (casTotalDeadTime)

> Dead State Count (casDeadCount)

### Index (casIndex)

AAA Servers Table index.

### Protocol (casProtocol)

Protocol used with server.

tacacsplus(1) represents TACACS+

radius(2) represents RADIUS

### IP Address (casAddress)

Server IP address.

### Curr State (casState )

Current state of server.

up(1) represents server responding to requests.

dead(2) means server failed to respond.

A server is marked dead when it does not respond after maximum retransmissions.

A server is marked up either after a waiting period or when some response is received.

Initial value of casState is 'up(1)' at system reinitialization. It transitions to 'dead(2)' when an attempt to communicate fails.

### Curr State Duration (casCurrentStateDuration )

Time elapsed since server reached its current state, as shown in casState.

### Prev State Duration (casPreviousStateDuration )

Time elapsed since server reached its previous state prior to the most recent transition of casState.

This value is zero if the server has not changed state.

### Total Dead Time (casTotalDeadTime )

Time elapsed since casState value of server reached dead(2) although system was not reinitialized.

### Dead State Count (casDeadCount )

Number of times casState value of server transitioned to dead(2) since system reinitialization.