Technical Tip: Identifying the DHCP trap information on SNMP manger (OID)

[VinayHM]

Description	The article describes how to identify the DHCP trap information on the SNMP manager (OID).
Scope	FortiGate.
Solution	If the device does not obtain IP from the DHCP server, it is possible to see trap messages by using SNMP: If the DHCP server runs out of the pool. IP conflict. DHCP client interface received nak. These are below oid used to get trap information about DHCP: OID TRAPS DESCRIPTION 1.3.6.1.4.1.12356.101.23.3.1.0 fgDhcpTrapType DHCP trap type, there are 3 different values as below: runOutOfIPPool(1) - The DHCP server runs out of the IP pool. conflict (2) - IP address is already in use. receivedNAK(3) - DHCP client interface received nak. 1.3.6.1.4.1.12356.101.23.3.2.0 fgDhcpTrapMessage DHCP trap message including some optional server info. 1.3.6.1.4.1.12356.101.23.3.3.0 fgDhcpServerId An ID that uniquely identifies a DHCP server within a vdom. For more troubleshooting, collect the output on ports 67 and 68: diag sniffer packet <interface_name/any> "port 67 or port 68" 6 0 l Related article: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Diagnosing-DHCP-on-a-FortiGate/ta-p/192960 https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-FortiGate-not-providing-DHCP-with-er...