You have an OSPF NSSA area that is also receiving IS-IS routes on the ASBR.
In this scenario, which LSA type is used to announce external IS-IS routes?
You have an OSPF NSSA area that is also receiving IS-IS routes on the ASBR.
In this scenario, which LSA type is used to announce external IS-IS routes?
In an OSPF Not-So-Stubby Area (NSSA), external routes such as those from IS-IS are advertised using Type 7 LSAs. These Type 7 LSAs are then translated to Type 5 LSAs by the Area Border Router (ABR) when they are routed into other OSPF areas. Therefore, the correct answer is Type 7.
In Juniper's implementation of OSPF and IS-IS, when you have an NSSA (Not-So-Stubby Area) that is also receiving IS-IS routes on the Autonomous System Border Router (ASBR), the LSA (Link-State Advertisement) type used to announce external IS-IS routes is Type 7. So the correct answer is: A. Type 7