All MIBs › DHCP-SERVER-MIB › dhcpServDhcpCountNacks
dhcpServDhcpCountNacks
Module: DHCP-SERVER-MIB
OID (symbolic): DHCP-SERVER-MIB::dhcpServDhcpCountNacks
OID (numeric): 1.3.6.1.4.1.1751.1.48.1.1.1.1.4.9
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: The number of DHCPNACK (option 53 with value 6) packets sent.
What is dhcpServDhcpCountNacks?
Running total of DHCPNACK messages (option 53 value 6) sent, meaning the server rejected a client's requested address (e.g. because it's out of the client's subnet or already leased elsewhere). A rising NACK count relative to ACKs often points to clients holding stale leases after a network change.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1751.1.48.1.1.1.1.4.9 snmpwalk -v2c -c public <target> DHCP-SERVER-MIB::dhcpServDhcpCountNacks
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1751.1.48.1.1.1.1.4.9.1 snmpget -v2c -c public <target> DHCP-SERVER-MIB::dhcpServDhcpCountNacks.1
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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 |
| 1.3.6.1.4.1.1751 | lucent | ACMIB |
| 1.3.6.1.4.1.1751.1 | products | AGGREGATED-EXT-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1751.1.48 | ipspg | DHCP-SERVER-MIB |
| 1.3.6.1.4.1.1751.1.48.1 | ipspgServices | DHCP-SERVER-MIB |
| 1.3.6.1.4.1.1751.1.48.1.1 | ipspgDHCP | DHCP-SERVER-MIB |
| 1.3.6.1.4.1.1751.1.48.1.1.1 | dhcpServMib | DHCP-SERVER-MIB |
| 1.3.6.1.4.1.1751.1.48.1.1.1.1 | dhcpServMibObjects | DHCP-SERVER-MIB |
| 1.3.6.1.4.1.1751.1.48.1.1.1.1.4 | dhcpServDhcpCounters | DHCP-SERVER-MIB |
| 1.3.6.1.4.1.1751.1.48.1.1.1.1.4.9 | dhcpServDhcpCountNacks | DHCP-SERVER-MIB |