FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
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Staff
Staff
Article Id 192303

Description


This article describes how to see the number of free IPs of an internal DHCP server on a FortiGate.

 

Scope

 

FortiGate.


Solution


When FortiGate assigns an IP to a host from the internal DHCP server, it generates an informational log with the ID: 0100026003.

 
To view the current status of the DHCP allocations on the FortiGate:
  • Go to Log & Report -> System Events.
  • Filter the log by: log ID:  0100026003.
 
DHCP.PNG
 
Select the log line to view DHCP statistics:
  • Interface with the DHCP server.
  • Used IPs.
  • Total of IPs.
 
Option 2:

To know how many IPs are left to hand over from the DHCP server-enabled interface,

 

Under Interface, hover over the DHCP Clients column for any required DHCP server-enabled interface.

 

It shows Client Count, Remaining Leases, and Total Allowed Leases.

 

Raghu_Kumar_0-1659364107769.png

 

 

Note.

Client Count: Number of IPs released/DHCP clients for that interface.

 

Remaining Lease: Number of IPs yet to be leased out/left out for that interface.

 

Total Allowed Leases: Total number of usable IPs available according to the DHCP range configured for that interface.

 

Related article:

Troubleshooting Tip: Resolving DHCP Pool Exhaustion on FortiGates