# Typical Interface Configuration Information

The CiscoView configure port 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 displayed for many device types:

> Index (ifIndex)

> CATEGORY (the pulldown menu)

> Description (ifDescr)

> Type (ifType)

> Mtu (ifMtu)

> Speed (ifSpeed)

> Physical Address (ifPhysAddr)

> Admin Status (ifAdminStatus)

> Operational Status (ifOperStatus)

> Last Change (ifLastChange)

> Local Description (ifAlias)

### Index (ifIndex)

A unique identifier for an interface. The value ranges between 1 and the value of ifNumber. The value for each interface remains constant at least from one re-initialization of the entity network management system to the next re-initialization.

### Description (ifDescr)

Presents 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(ifMtu)

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

### Speed (ifSpeed)

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

If the bandwidth of the interface is greater than the maximum value reported, the maximum bandwidth of the interface (4,294,967,295) is shown and ifHighSpeed is used to report the interface speed.

Note:

For the sublayer which has no bandwidth concept, the value is zero.

### 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, displays a 0-length octet string.

### Admin Status (ifAdminStatus)

Specifies the intended interface state. Possible values are up, down, and testing. Users cannot set the testing value.

### Operational Status (ifOperStatus)

Indicates the current actual operating state of the interface.

### Last Change (ifLastChange)

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

### Local Description (ifAlias)

The alias for the interface, as specified by a network manager.