All MIBs › CENTRECOM-VLAN-MIB › atiNextAvailableVirtIfIndex
atiNextAvailableVirtIfIndex
Module: CENTRECOM-VLAN-MIB
OID (symbolic): CENTRECOM-VLAN-MIB::atiNextAvailableVirtIfIndex
OID (numeric): 1.3.6.1.4.1.207.8.12.2.4.2.1
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 atiNextAvailableVirtIfIndex?
This read-only counter hands out the next unused virtual ifIndex value that an NMS should use when creating a new row in any table indexed by ifIndex on this switch, and its value automatically advances once the currently offered index gets consumed by an actual row creation. It matters as a collision-avoidance mechanism: without it, two management sessions racing to create VLAN interfaces could both pick the same ifIndex and one creation would fail. An NMS provisioning several VLANs in sequence would read this object before each new row, get a fresh value like 5002 then 5003, and use each one exactly once.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.207.8.12.2.4.2.1 snmpwalk -v2c -c public <target> CENTRECOM-VLAN-MIB::atiNextAvailableVirtIfIndex
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.207.8.12.2.4.2.1.1 snmpget -v2c -c public <target> CENTRECOM-VLAN-MIB::atiNextAvailableVirtIfIndex.1
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OID Breakdown
Upper-level ancestors (10 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 |
| 1.3.6.1.4.1.207 | alliedTelesyn | AT-RG600-MIB |
| 1.3.6.1.4.1.207.8 | mibObject | AT-RG600-MIB |
| 1.3.6.1.4.1.207.8.12 | atkkSwitchMIB | CENTRECOM-MIB |
| 1.3.6.1.4.1.207.8.12.2 | extSwitchMIB | CENTRECOM-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.207.8.12.2.4 | atiVlan | CENTRECOM-VLAN-MIB |
| 1.3.6.1.4.1.207.8.12.2.4.2 | atiVirtualGroup | CENTRECOM-VLAN-MIB |
| 1.3.6.1.4.1.207.8.12.2.4.2.1 | atiNextAvailableVirtIfIndex | CENTRECOM-VLAN-MIB |