I have a user who as a BT Infinity connection (ie BT Openreach Mode ----> BT Home Hub3 )
I am trying to replace the BT Home Hub with a Fortigate 30D, but once installed I have no internet access from any device on the LAN side.
Went through the Wizard and the fortinet appears to connect to the modem fine and get relevent WAN IPs ( I have all green ticks for the relevant subscriptions) and the WAN interface reports as connected. All the internal devices have the LAN IP of the fortinet as their gateway, but do not appear to be able to get beyond it. They can ping the fortinet but nothing beyond it WAN side. The routing table also looks fine as do the firewall policies.
I don't think that's the issue, we ran into similar issues with BT and we had to wait until the mac_address cache was expired but you can double check for vlan-id tagging by doing a diag sniffer packet <wan> "vlan" 4 on the interface attach to BT network after you crafted the vlan-subinterface.
Do you have a cable modem you're plugging into? They have their own MAC cache and you have to power them down for at least a minute in order to clear that so it'll talk to the Fortinet. IF you're using static IP that is, and maybe dynamic, depending.
Yeah that's what we did, just power cycle the bt-hub and then you should be good. FWIW What we did previously was to clone the original mac_ether-address on the fortigate wan interface when we going back and forth between 2 devices.
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