Technical Tip: Error When Configuring DHCP Reserved Addresses on FortiSwitch

[Vishnuprasad]

Description	This article describes an error that occurs when attempting to configure additional DHCP-reserved addresses on a standalone FortiSwitch.
Scope	FortiSwitch 124E-FPOE.
Solution	Reserving DHCP IP addresses for specific MAC addresses can be performed after configuring the DHCP server on the FortiSwitch. Below is an example that demonstrates how to reserve IP addresses under the DHCP server. Exceeding the limit will result in an error. Configuration Example: S124EF591xxxxxxx #config system dhcp server S124EF591xxxxxxx (server) # S124EF591xxxxxxx (server) # edit 1 S124EF591xxxxxxx (1) # config reserved-address S124EF591xxxxxxx (reserved-address) # S124EF591xxxxxxx (reserved-address) # edit 1 new entry '1' added S124EF591xxxxxxx (1) # set ip 10.10.10.10 S124EF591xxxxxxx (1) # set mac aa:aa:aa:aa:aa:aa S124EF591xxxxxxx (1) # set type mac S124EF591xxxxxxx (1) # next S124EF591xxxxxxx (reserved-address) # edit 2 new entry '2' added S124EF591xxxxxxx (2) # S124EF591xxxxxxx (2) # set ip 10.10.10.11 S124EF591xxxxxxx (2) # set mac bb:bb:bb:bb:bb:bb S124EF591xxxxxxx (2) # set type mac S124EF591xxxxxxx (2) # next S124EF591xxxxxxx (reserved-address) # edit 3 new entry '3' added S124EF591xxxxxxx (3) # set ip 10.10.10.12 S124EF591xxxxxxx (3) # set mac cc:cc:cc:cc:cc:cc S124EF591xxxxxxx (3) # set type mac S124EF591xxxxxxx (3) # next S124EF591xxxxxxx (reserved-address) # S124EF591xxxxxxx (reserved-address) # edit 4 new entry '4' added S124EF591xxxxxxx (4) # set ip 10.10.10.13 S124EF591xxxxxxx (4) # set mac dd:dd:dd:dd:dd:dd S124EF591xxxxxxx (4) # set type mac S124EF591xxxxxxx (4) # next S124EF591xxxxxxx (reserved-address) # edit 5 Too many entries in this table: 4 / max=4 Command fail. Return code -361 As shown above, when attempting to add more than four reserved addresses on the FortiSwitch 124E-FPOE, receive the error: 'Too many entries in this table: 4 / max=4'. In some firmware versions, this specific message might not appear, and only the generic error message will be displayed: 'Command fail. Return code -361'. To determine the DHCP reserved address limits for different FortiSwitch models, refer to DHCP-reserved-list.