# Typical Interface Information

The CiscoView Monitor Port dialog box displays interface level utilization and performance information for all ports. The information fields might vary according to device types. The following port performance information is displayed for many device types:

> Utilization %

> In Error %

> Out Error %

> Input (Last 5min) (locIfInBitsSec)

> Output (Last 5min) (locIfOutBitsSec)

> In Queue Drops (locIfInputQueueDrops)

> Out Queue Drops (locIfOutputQueueDrops)

> Out Collisions (locIfCollisions)

> Ignored In Packets (locIfInIgnored)

> Internal Resets (locIfResets)

### Utilization %

Indicates the rate of utilization on the specified port.

The formula to calculate the port utilization is:

Utilization for half duplex = (Delta[ifInOctets] + Delta[ifOutOctets]* 8 * 100%) / (ifSpeed * DELTA_TIME)

Utilization for full duplex = (max (Delta[ifInOctects], Delta[ifOutOctets])* 8 * 100) / (ifSpeed * DELTA_TIME)

where Delta[ifInOctets] = ifInOctects1 - ifInOctects0

Delta[ifOutOctets] = ifOutOctects1 - ifOutOctects0

DELTA_TIME = (sysUpTime1 - sysUpTime0)/100 ---> in sec ( sysUpTime will be in milli secs. we have to divide by 100 to get into sec)

ifSpeed is the estimate of current bandwidth in bits per second

ifInOctects0 is ifInOctects value at a polling cycle and

ifInOctects1 is ifInOctects value at NEXT polling cycle.

Example: If monitor chart is at refresh rate 30 sec, then ifInOctets0 will be at time 12:10:20 and ifInOctets1 will be at 12:10:50.

### In Error %

Specifies the incoming error rate on the port. The error rate is determined by the following formula:

[ ifInError / (ifInUcastPkts + IfInNUcastPkts + ifInErrors + ifInDiscards + ifInUnknownProtos)] * 100.

### Out Error %

Specifies the outgoing error rate on the port. The error rate is determined by the following formula:

ifOutErrors / (ifOutUcastPkts + ifOutNUcastPkts) * 100

### Input (Last 5min) (locIfInBitsSec)

Provides a 5-minute exponentially decayed moving average of input bits per second.

### Output (Last 5min) (locIfOutBitsSec)

Provides a 5-minute exponentially decayed moving average of output bits per second.

### In Queue Drops (locIfInputQueueDrops)

Number of packets dropped because the input queue was full.

### Out Queue Drops (locIfOutputQueueDrops)

Displays the number of packets dropped because the output queue was full.

### Out Collisions (locIfCollisions)

Number of output collisions detected on this interface.

### Ignored In Packets (locIfInIgnored)

Number of input packets that are ignored by this interface.

### Internal Resets (locIfResets)

Number of times this interface was internally reset.