What is a limitation to consider when running a dynamic routing protocol on a Cisco FTD device in IRB mode?

"link-stale routing protocols" is not a recognized category of routing protocols in this context.

FTD devices support both distance vector (e.g., EIGRP) and link-state (e.g., OSPF) routing protocols, so limiting to only distance vector is incorrect.

EtherChannel interfaces can be used in IRB mode, but the limitation is about nonbridge interfaces for dynamic routing, not a restriction to EtherChannel.

When an FTD device is configured in IRB mode, it allows a combination of routed and bridged interfaces. However, dynamic routing protocols like OSPF or EIGRP are only supported on the routed interfaces, not on the bridge group member interfaces. This means traffic routed by dynamic protocols cannot directly enter or exit a bridge group.