All MIBs › CISCO-NETWORK-REGISTRAR-MIB › cnrDHCPScopeFreeAddrHighThreshold
cnrDHCPScopeFreeAddrHighThreshold
Module: CISCO-NETWORK-REGISTRAR-MIB
OID (symbolic): CISCO-NETWORK-REGISTRAR-MIB::cnrDHCPScopeFreeAddrHighThreshold
OID (numeric): 1.3.6.1.4.1.9.9.120.1.1.1.1.3
Node type: OBJECT-TYPE
Type: Unsigned32
Access: accessible-for-notify
Description: The high threshold for available free addresses in this scope. If a cnrDHCPScopeFreeAddrLowThreshold event has been generated for this scope, and the value for available free addresses has exceeded the value of cnrDHCPScopeFreeAddrHighThreshold, then a ciscoNetRegFreeAddressHigh event will be generated. No more ciscoNetRegFreeAddressHigh events will be generated for this scope during this execution of the DHCP server until the value for available free addresses becomes equal to or less than the value of cnrDHCPScopeFreeAddrHighThreshold.
This value may be expressed as either an absolute value or a percentage; the units are specified by the value of cnrDHCPScopeFreeAddrUnits.
What is cnrDHCPScopeFreeAddrHighThreshold?
This object defines the high-water-mark number of free, unallocated addresses in a DHCP scope that, once exceeded after a prior low-threshold event fired, triggers a notification confirming address pressure on that scope has eased. It matters because it is the all-clear signal in a threshold-based pair; without it, an admin who got paged about a scope running low on free addresses would have no automatic notification confirming when the pool has since recovered, for example after expired leases were reclaimed. Configuring this to 500 on a scope means the pressure-relieved notification only fires once available addresses climb back above 500, not at the first sign of any recovery.
OID Breakdown
Upper-level ancestors (8 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 |
| 1.3.6.1.4.1.9 | cisco | CAT2600-MIB |
| 1.3.6.1.4.1.9.9 | ciscoMgmt | CISCO-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.9.120 | ciscoNetworkRegistrarMIB | CISCO-NETWORK-REGISTRAR-MIB |
| 1.3.6.1.4.1.9.9.120.1 | ciscoNetworkRegistrarMIBObjects | CISCO-NETWORK-REGISTRAR-MIB |
| 1.3.6.1.4.1.9.9.120.1.1 | cnrDHCP | CISCO-NETWORK-REGISTRAR-MIB |
| 1.3.6.1.4.1.9.9.120.1.1.1 | cnrDHCPScopeTable | CISCO-NETWORK-REGISTRAR-MIB |
| 1.3.6.1.4.1.9.9.120.1.1.1.1 | cnrDHCPScopeEntry | CISCO-NETWORK-REGISTRAR-MIB |
| 1.3.6.1.4.1.9.9.120.1.1.1.1.3 | cnrDHCPScopeFreeAddrHighThreshold | CISCO-NETWORK-REGISTRAR-MIB |