# Understanding Port Configuration Information

The CiscoView Port Configuration window displays interface information for all router interface types, including Ethernet, Token Ring, FDDI, serial, ATM, high-speed serial, T1, and E1 ports.

Some port information fields are displayed only for certain types of devices. The exact list of fields in the display therefore varies, depending upon the device type. The following port information fields are typically displayed for many device types:

CATEGORY

Description

Type

MTU

Speed

Physical Address

Admin Status

Operational Status

Last Change

Local Description

# CATEGORY

Specifies the name of the group of management information. For example, the Interface category consists of MIB variables from the appropriate RFC.

# Description (ifDesc)

Describes the interface information (for example, the product name, manufacturer, and hardware version).

# Type (ifType)

Specifies the network interface type defined in the MIB-II interface table.

For example, the interface type ethernet-csmacd indicates the CSMA/CD Ethernet Media Access Control (MAC) protocol, as defined by Digital, Intel, and Xerox ("DIX"). Refer to an SNMP reference book for a full list of the Interface Table types.

# MTU

Specifies the size (in octets) of the largest protocol data unit that can be sent or received on the interface.

# Speed (ifSpeed)

Displays an estimate of current bandwidth in bits per second. If the value is constant or cannot be measured, nominal bandwidth is used.

# Physical Address (ifPhysAddr)

If applicable, displays a physical address such as an Ethernet MAC address, a telephone number, or a Packet Data Net address. If not applicable, a 0-length octet string is provided.

# Admin Status (ifAdminStatus)

Specifies the intended interface state. Possible values are up, down, or testing. The testing value may not be set by users.

# Operational Status (ifOperStatus)

Indicates the current actual operating state of the interface.

# Last Change (ifLastChange)

Specifies (in hundredths of seconds) the value of the sysUpTime when the interface entered its current operational state (0 if the current state was entered before the last initialization of the management entity).

# Local Description (locIfDescr)

Displays a description of the interface (such as Ethernet, serial, and so on) that corresponds to the user-configurable description commands.