Firepower 2110 only has interface type static and dhcp.I cannot see pppoe option in WAN interface.
I use FDM for management.
As noted below, FDM-managed Firepower Threat Defense hardware appliances added PPoE support in 6.6.
PPPoE is not supported on FMC-managed devices. If your ISP requires PPPoE, you will have to put a router with PPPoE support between the FTD and the WAN modem (when using FMC management).
Then I have only two methods now.
1.put a router with PPPoE support between the FTD and the WAN modem.2. Can it be achieved by downgrading the version?
PPPOE was introduced in FDM from version 6.6
Thanks for the update @Rob Ingram. I had forgotten they added that to FDM only in 6.6.
I corrected my earlier reply.
Okay, thank you. I saw. The current version of the customer is 6.2.3
When you configure/edit the physical interface, for IPv4 for example, under IPv4 choose "PPPoE" and you should see the authentication parameters, see attached:
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