# Monitoring Port Interface Performance

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

Utilization %

In Error %

Out Error %

Input BPS (5 min)

Output BPS (5 min)

In Queue Drops

Out Queue Drops

Out Collisions

Ignored In Pkts

Internal Resets

# Utilization %

Determines the rate of utilization on the specified port.

The utilization rate is determined by the following formula:

(ifInOctets + ifOutOctets) / ifSpeed * 800

# In Error %

Specifies the incoming error rate on the port.

The error rate is determined by the following formula:

ifInErrors / (ifInUcastPkts + ifInNUcastPkts) * 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 BPS (5 min)

Provides a 5-minute exponentially delayed average of CPU input bits per second.

# Output BPS (5 min)

Displays a 5-minute weighted average of output bits per second for the specific protocol.

# In Queue Drops (locIfInputQueueDrops)

Displays the 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

Displays the number of output collisions detected on this interface.

# Ignored In Pkts

Displays the number of input packets that are ignored by this interface.

# Internal Resets

Displays the number of times this interface is internally reset.