I'm currently preparing for the CCIE R&S lab and cannot seem to get a clear feel for the possible requirement to "NOT actively run a routing protocol on interfaces if not necessary". The prep workbook I am working with does not provide a clear answer over the many cases provided, perhaps any of you can tell me your thoughts on the matter?
In plenty of the prep labs there are configuration questions such as:
"enable EIGRP on Loopback0 and FastEthernet 0/0"
Background info here is that there is NO neighboring EIGRP router on the Fa0/0 segment.
1. My first reaction here would be to make the fa0/0 interface passive. The only way to enable eigrp on an interface would be to use the <network> statement, telling the eigrp process to run on that interface. Does making the interface passive directly go against either of the requirements here?
2. What do generally do with loopback interfaces that are added through the <network> statement. Since these loopbacks are generally not used for routing, should they be made passive by default? Sometimes the workbook solutions do this, sometimes not.
I realize that these may be things to ask the Proctor, then again, he/she may not answer conclusively, creating the possibility of failing the points. Any ideas or better yet conclusive answers would be very helpful!!!