Viewing the Interface Group
3-2
Figure3-1. Interface Group Window
The following fields are non-statistical interface descriptions fields:
Address
The interface’s physical address (ifPhysAddr) at the protocol layer immediately
below the network layer in the protocol stack. For interfaces which do not have
such an address (e.g., a serial line), this object should contain an octet string of
zero length.
Interface Type
The type of interface (ifType), distinguished according to the physical/link
protocol(s) immediately below the network layer in the protocol stack. MIB-II
defines 32 different interface types, including ethernet-csmacd, fddi,
iso88025-tokenRing, and softwareLoopBack.
MTU (Maximum Transfer Unit)
The size of the largest datagram which can be transmitted or received on the
interface (specified in octets), according to the ifMtu. For interfaces that are used
for transmitting network datagrams, this is the size of the largest network
datagram that can be sent on the interface. Frames that exceed the MTU are
discarded.
Speed
An estimate of the interface’s current bandwidth in bits per second, according to
the ifSpeed. For interfaces which do not vary in bandwidth or for those where no
accurate estimation can be made, this object should contain the nominal
bandwidth.