With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cDhcpv4ServerSubnetFreeAddressHighEnable
Cisco IETF Dynamic Host Configuration protocol Server Subnet Free Address High Enable
1.3.6.1.4.1.9.10.122.1.6.5
This object specifies if the DHCP module should generate 'cDhcpv4ServerSubnetFreeAddressHigh' notifications. If value of this object is 'true', then the notification is generated when the number of available IPv4 addresses for a particular subnet has fallen below the value of cDhcpv4ServerSubnetFreeAddrHighThreshold for that subnet. If it is 'false', the notification is not generated.
Back to CISCO-IETF-DHCP-SERVER-EXT-MIB MIB page.
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