4/8/2021 0 Comments Fortigate Dhcp Reservation Gui
There are a few hidden, but very important options that you cannot configure in the GUI of Fortinet.Below are the setups to setup a DHCP scope in CLI, and add options.Another option is to configure the scope through GUI, and then just modify the scope through CLI to add the options.This could be used with Ruckus wireless to push AP broadcasts to the Zonedirector.
If you need to add options such as WINS, NTP, or other options it might be best to configure these through CLI. If you have a FortiManager on this interface, or FortiAPs in tunnel mode, add the relevant services like you would in IPv4. I have not tested 5.6.x but am assuming it has the same issue. If you use an ISP link with Prefix Delegation but have an internal core router downstream from the Fortigate, you may need a static IPv6 prefix instead. Its an interesting use case, and I lack the second link to test it. This post does not apply to Enterprise networks, though I mention Enterprise for reference here and there. Subnetting further really isnt a thing, with the exception of 127 point to point links, done for security reasons. You can have more than one 64 on one VLAN and clients can have more than one IPv6 address. ![]() For example, 2001:db8:3c4d:f40::64 might be your subnet, and 2001:db8:3c4d:f40::164 is the address assigned to your Fortigate interface on that subnet. Not all client operating systems can receive a DNS server without DHCPv6. This prefix is received on your ISP-facing interface via DHCPv6 Prefix Delegation (PD), and can then be assigned dynamically to your internal interface(s). These prefixes are dynamic and will change, just like a DHCPv4 address. This example only shows the ipv6 portion of the configuration. Comcast on a residential line will assign a 64 in that case, for example. Without their explanations, Id still be stuck thinking that FortiOS doesnt support dynamic allocations. The examples given in the FortiOS handbook are brief and lack all explanation. Im showing using specified DNS servers, and will mention the commands required to use the ISPs DNS servers instead. Ill mention the commands required if you want to use DHCPv6 address assignment, though Im not sure what would be gained. Some OSs will receive DNS via DHCPv6, others only through RDNSS. ![]() Likewise, if you use DHCPv6 for address assignment, make sure it matches the SLAAC assignment on the interface. ![]() Because of OS implementation quirks, you should keep both the managed-flag and the other-flag in that case. I am not sure of that, and it might depend on FortiOS version. I think FortiOS 6.0.1, where I tested that, just needs a couple minutes time to assign the interface its address, but Im not 100 certain of that.
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