Cisco AJ732A - MDS 9134 Fabric Switch Quick Reference Manual page 5

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Tables
When network management protocols use names of MIB objects in messages, each name has an
appended suffix. This suffix is called an instance identifier. It identifies one occurrence of the associated
MIB object. For simple scalar objects, the instance identifier 0 refers to the instance of the object with
that name (for example, sysUpTime.0).
A MIB also can contain tables of related objects. For example, ifOperStatus is a MIB object inside the
ifTable from the IF-MIB. It reports the operational state for an interface on a device. Because devices
may have more than one interface, it is necessary to have more than one instance of ifOperStatus. This
instance value is added to the end of the MIB object as the instance identifier (for example,
ifOperStatus.2 reports the operational state for interface number 2).
Each object in a table is constructed with a set of clauses defined by the SMI. These clauses include the
SYNTAX clause, MAX-ACCESS clause, STATUS clause, and DESCRIPTION clause.
An excerpt of the information in the VSAN table (known as vsanTable) from CISCO-VSAN-MIB
follows:
vsanTable OBJECT-TYPE
vsanEntry OBJECT-TYPE
VsanEntry ::= SEQUENCE {
In the example, vsanTable contains two variables: vsanIndex and vsanName. (There are more values in
the actual vsanTable.) The index for this table is the ID of the VSAN, or vsanIndex. With n number of
VSANs configured, n rows are present in the table. If you want to retrieve the vsanName that matches
VSAN ID 3 (vsanIndex is 3), then you would issue an SNMP get for vsanName.3.
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SYNTAX SEQUENCE OF VsanEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of VSANs configured on this device."
::= { vsanConfiguration 3 }
SYNTAX VsanEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry (conceptual row) in the vsanTable."
INDEX { vsanIndex }
::= { vsanTable 1 }
vsanIndex
vsanName
}
VsanIndex,
SnmpAdminString,