Q: If I configure authentication, will R3 receive updates only from R2 anyway?
A: An additional router could be installed on the same VLAN; if this was configured with the same authentication parameters, it could also send updates to R3.
Q: I do not have the neighbor feature available in this version of code, should I be using this?
A: No, you have a similar feature available to you, which is configurable in a different manner.
