All MIBs › GENERIC-3COM-VLAN-MIB-1-0-1 › a3ComNextAvailableVirtIfIndex
a3ComNextAvailableVirtIfIndex
Module: GENERIC-3COM-VLAN-MIB-1-0-1
OID (symbolic): GENERIC-3COM-VLAN-MIB-1-0-1::a3ComNextAvailableVirtIfIndex
OID (numeric): 1.3.6.1.4.1.43.10.1.14.3.1
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: The value of the next available virtual ifIndex. This object is used by an NMS to select an index value for row-creation in tables indexed by ifIndex. The current value of this object is changed to a new value when the current value is written to an agent's table, that is indexed by ifIndex. Row creation using the current value of this object, allocates a virtual ifIndex. Note the following:
1. A newly created row does not have to be active(1) for the agent to allocate the virtual ifIndex.
2. Race conditions between multiple NMS's end when a row is created. Rows are deemed created when a setRequest is successfully committed (i.e. the errorStats is noError(0)).
3. An agent that exhausts its supply of virual ifIndex values returns zero as the value of this object. This can be used by an NMS as an indication to deleted unused rows and reboot the device.
What is a3ComNextAvailableVirtIfIndex?
This read-only value hands out the next available virtual ifIndex an NMS should use when creating a new VLAN or encapsulation interface row. Because index values must be allocated in a race-free way, the agent advances this value only once a row using the current value is successfully committed, and returns 0 if the device has exhausted its supply of virtual indexes. If a3ComNextAvailableVirtIfIndex reads 0 when an admin tries to add another VLAN interface, that signals the switch has run out of virtual ifIndex slots and old unused rows should be cleaned up first.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.43.10.1.14.3.1 snmpwalk -v2c -c public <target> GENERIC-3COM-VLAN-MIB-1-0-1::a3ComNextAvailableVirtIfIndex
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.43.10.1.14.3.1.1 snmpget -v2c -c public <target> GENERIC-3COM-VLAN-MIB-1-0-1::a3ComNextAvailableVirtIfIndex.1
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OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.43 | a3Com | A3COM-AUDL-R1-MIB |
| 1.3.6.1.4.1.43.10 | generic | A3Com-products-MIB |
| 1.3.6.1.4.1.43.10.1 | genExperimental | GENERIC-3COM-TRUNK-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.43.10.1.14 | genVirtual | GENERIC-3COM-VLAN-MIB-1-0-1 |
| 1.3.6.1.4.1.43.10.1.14.3 | a3ComVirtualGroup | GENERIC-3COM-VLAN-MIB-1-0-1 |
| 1.3.6.1.4.1.43.10.1.14.3.1 | a3ComNextAvailableVirtIfIndex | GENERIC-3COM-VLAN-MIB-1-0-1 |