Monday, June 14, 2021

IP reservation causing dhcp snooping errors

Hello there !

I have an environment of Cisco 2960x/2960cx and Fortigate 30E/60E and having the problem as follows:

There are devices in my network that I need make for them IP reservations, like printers and time-watches that their IP is registered in servers manually, so if they change their address (in case a site goes down for a week/electricity break) we will have to troubleshoot and change the address accordingly in each server. While IP reservation in the Fortigate is a good option- after several days the 2960X/2960CX screaming at me "DHCP_SNOOPING_DENY: 1 Invalid ARPs (Res) on Gi0/1".

How can I have the best of both worlds: Keeping dhcp snooping on the ports + making a IP reservation for a device ?

Thank you !



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