SNMP MIB Objects
E-5
3360-A2-GB20-20
December 1996
Interface Group – “ifLastChange” Object
(ifEntry 9)
This object contains the value of “sysUpTime” at the
time the interface entered its current operational state. For
the E1 NTU, this object is only updated for the “up” and
“down” states. This is done since the “testing” state is not
mutually exclusive with the “up” and “down” states.
Interface Group – Input Counters
(objects ifEntry 10 to ifEntry 15)
These objects collect statistics on the data received by
the COM port and the AUX port when these ports are
configured as SNMP management links. For interfaces
that are not configured as an SNMP management link,
these statistics are not provided and an error status is
returned if access is attempted. The objects used to collect
input statistics are listed below:
•
ifInOctets (ifEntry 10)
•
ifInUcastPkts (ifEntry 11)
•
ifInNUcastPkts (ifEntry 12)
•
ifInDiscards (ifEntry 13)
•
ifInErrors (ifEntry 14)
•
ifInUnknownProtos (ifEntry 15)
Interface Group – Output Counters
(objects ifEntry 16 to ifEntry 21)
These objects collect statistics on the data received by
the COM port and the AUX port when these ports are
configured as SNMP management links. For interfaces
that are not configured as an SNMP management link,
these statistics are not provided and an error status is
returned if access is attempted. The objects used to collect
output statistics are listed below:
•
ifOutOctets (ifEntry 16)
•
ifOutUcastPkts (ifEntry 17)
•
ifOutNUcastPkts (ifEntry 18)
•
ifOutDiscards (ifEntry 19)
•
ifOutErrors (ifEntry 20)
•
ifOutQLen (ifEntry 21)
IP Group, MIB II
The IP Group objects are supported by the E1 NTU for
all data paths which currently are configured to carry IP
data to or from the E1 NTU, including the COM, AUX,
EDL, and FDL. All of the objects in the IP Group other
than the IP Address Translation table are fully supported.
The IP Address Translation table (ipNetToMediaTable)
does not apply to the E1 NTU and will be empty (i.e.,
have zero entries). The following sections provide
clarification for objects contained in the IP Group when it
is not clear how the object definition in MIB II is related
to the E1 NTU.
IP Group – “ipForwarding” Object (ip 1)
This object specifies whether the unit is acting as an IP
gateway in respect to the forwarding of a datagram
received by, but not addressed to, this unit. Only the
following value is supported by the E1 NTU.
•
forwarding(1) – The unit is acting as a gateway.
IP Group – “ipAddrTable” Object (ip 20)
The address table is supported by the E1 NTU.
IP Group – “ipAdEntAddr” Object
(ipAddrEntry 1)
The ipAdEntAddr object is an IP address supported by
the device and serves as the index to the address table.
Since indexes for tables must be unique, only one ifIndex
may be displayed for each IP address supported by the
device. If you have configured the same IP address for
multiple interfaces or for default IP addresses, you will
not see all interfaces that support a particular IP address
upon display of the ipAddrTable.
IP Group – “ipAdEntIfIndex” Object
(ipAddrEntry 2)
For some address table entries, the ipAdEntIfIndex
object may have a value greater than ifNumber. In these
cases, the ipAdEntIfIndex refers to a proprietary interface
which is not currently implemented by the interface group
of MIB II.
