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SNMP MIB Objects
E-4
Interface Group – "ifIndex" Object (ifEntry 1)
This object provides the index into the ifTable and typically into tables in other
MIBs also. The values of the ifIndex object do not vary between models even
though not all indexes are supported for a particular model. When an
unsupported index is accessed, "noSuchName" is returned.
The following are the values of the ifIndexes for the Model 3166 DSU/CSU:
H
1 – Net T1
H
3 – COM port
H
6 – DCE port 1
Interface Group – "ifDescr" Object (ifEntry 2)
This object provides information about the interface. Each interface displays a
text string as shown below:
Network T1:
"Network T1. [ Company Name ] T1 DSU/CSU, Hardware
Version: [CCA number for the CSU board]".
"COM port. [ Company Name ] T1 DSU/CSU, Hardware
COM:
Version: [CCA number for the CSU board for the standalone,
or the CCA number for the DSU board for the carrier]".
"Data Port 1. [ Company Name ] T1 DSU/CSU, Hardware
Data Port:
Version: [CCA number for the DSU board]"
(where n is 1 to 4).
Interface Group – "ifType" Object (ifEntry 3)
This object identifies the type of the interface based on the physical/link
protocol(s) immediately below the network layer. Only the following values are
supported by the DSU/CSU:
H
ds1 – Used for the network interface.
H
propPointToPointSerial(22) – Used for the synchronous data port. Used for
the COM port when the port is not configured as the SNMP management
interface.
H
ppp(23) – Used for the COM port when the port is configured for PPP.
H
slip(28) – Used for the COM port when the port is configured for SLIP.
Interface Group – "ifMtu" Object (ifEntry 4)
This object identifies the largest datagram that can be sent or received on the
interface. It is applicable only to the interface configured as the SNMP
management link. This object is zero for all other interfaces.
March 1999
3166-A2-GB20-20
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