All MIBs › A3COM-HUAWEI-DHCPSNOOP-MIB › h3cDhcpSnoopSpoofServerDetected
h3cDhcpSnoopSpoofServerDetected
Module: A3COM-HUAWEI-DHCPSNOOP-MIB
OID (symbolic): A3COM-HUAWEI-DHCPSNOOP-MIB::h3cDhcpSnoopSpoofServerDetected
OID (numeric): 1.3.6.1.4.1.43.45.1.10.2.36.2.0.1
Node type: NOTIFICATION-TYPE
Description: To detect unauthorized DHCP servers on a network, the DHCP snooping device sends DHCP-DISCOVER messages through its downstream port (which is connected to the DHCP clients). If any response (DHCP-OFFER message) is received from the downstream port, an unauthorized DHCP server is considered present, and then the device sends a trap. With unauthorized DHCP server detection enabled, the interface sends a DHCP-DISCOVER message to detect unauthorized DHCP servers on the network. If this interface receives a DHCP-OFFER message, the DHCP server which sent it is considered unauthorized.
Examples
Send this trap to an SNMP manager — replace <manager> with the IP or hostname of your monitoring server (SNMPv2c):
snmptrap -v2c -c public <manager> '' A3COM-HUAWEI-DHCPSNOOP-MIB::h3cDhcpSnoopSpoofServerDetected snmptrap -v2c -c public <manager> '' 1.3.6.1.4.1.43.45.1.10.2.36.2.0.1
Listen for incoming traps on the manager host (-f keeps it in the foreground, -Lo prints to stdout — useful for testing):
snmptrapd -f -Lo -c /dev/null authCommunity log public
Example snmptrapd log entry:
zoo11-linux.zoo [UDP: [192.168.30.111]:54471->[192.168.30.10]:162]: DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (112335559) 13 days, 0:02:35.59 SNMPv2-MIB::snmpTrapOID.0 = OID: A3COM-HUAWEI-DHCPSNOOP-MIB::h3cDhcpSnoopSpoofServerDetected
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OID Breakdown
Upper-level ancestors (11 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 |
| 1.3.6.1.4.1.43 | a3Com | A3COM-AUDL-R1-MIB |
| 1.3.6.1.4.1.43.45 | jv_mib | A3COM-HUAWEI-OID-MIB |
| 1.3.6.1.4.1.43.45.1 | huawei | A3COM-HUAWEI-OID-MIB |
| 1.3.6.1.4.1.43.45.1.10 | h3c | A3COM-HUAWEI-OID-MIB |
| 1.3.6.1.4.1.43.45.1.10.2 | h3cCommon | A3COM-HUAWEI-OID-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.43.45.1.10.2.36 | h3cDhcpSnoop | A3COM-HUAWEI-DHCPSNOOP-MIB |
| 1.3.6.1.4.1.43.45.1.10.2.36.2 | h3cDhcpSnoopTraps | A3COM-HUAWEI-DHCPSNOOP-MIB |
| 1.3.6.1.4.1.43.45.1.10.2.36.2.0 | h3cDhcpSnoopTrapsPrefix | A3COM-HUAWEI-DHCPSNOOP-MIB |
| 1.3.6.1.4.1.43.45.1.10.2.36.2.0.1 | h3cDhcpSnoopSpoofServerDetected | A3COM-HUAWEI-DHCPSNOOP-MIB |