We recently migrated a customer site from Layer-2 edge to Layer-3 edge by taking advantage of the EIGRP Stub feature in the IP Base image for the Catalyst 3750. We had tested the concept in the Lab and everything worked, however we didn't test authentication (assuming it would work?). When it was configured on site it didn't work, no adjacencies were formed. We played around with it briefly but couldn't get it to work so the workaround was to not use authentication.
The only explanation I can think of is that EIGRP Authentication isn't available in the IP Base image, however it is configurable. I looked but couldn't find any references to this in the documentation or release notes. Does anyone know if this is the case? We were using 12.2(37)SE1 IP Base on the 3750's with routed uplinks to a pair of Catalyst 4500's with SupIV's running 12.2(37)SG Enterprise Services.