All MIBs › EXTREME-VLAN-MIB › extremeNextAvailableVirtIfIndex
extremeNextAvailableVirtIfIndex
Module: EXTREME-VLAN-MIB
OID (symbolic): EXTREME-VLAN-MIB::extremeNextAvailableVirtIfIndex
OID (numeric): 1.3.6.1.4.1.1916.1.2.2.1
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 extremeNextAvailableVirtIfIndex?
Read-only counter an NMS reads to obtain the next free virtual ifIndex before creating a row in any ifIndex-indexed table; the value changes once that index is actually consumed by a table write, and a value of zero means the device has exhausted its supply of virtual indexes. An admin seeing this pegged at zero knows it's time to clean up unused VLAN/encapsulation rows and reboot the device to reclaim index space.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1916.1.2.2.1 snmpwalk -v2c -c public <target> EXTREME-VLAN-MIB::extremeNextAvailableVirtIfIndex
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1916.1.2.2.1.1 snmpget -v2c -c public <target> EXTREME-VLAN-MIB::extremeNextAvailableVirtIfIndex.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 |
| 1.3.6.1.4.1.1916 | extremenetworks | EXTREME-BASE-MIB |
| 1.3.6.1.4.1.1916.1 | extremeAgent | EXTREME-BASE-MIB |
| 1.3.6.1.4.1.1916.1.2 | extremeVlan | EXTREME-BASE-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1916.1.2.2 | extremeVirtualGroup | EXTREME-VLAN-MIB |
| 1.3.6.1.4.1.1916.1.2.2.1 | extremeNextAvailableVirtIfIndex | EXTREME-VLAN-MIB |