How is the intra-tier transit link connection created between SR and DR for a Tier-0 Gateway?
How is the intra-tier transit link connection created between SR and DR for a Tier-0 Gateway?
The intra-tier transit link connection between SR (Service Router) and DR (Distributed Router) for a Tier-0 Gateway is automatically created when SR is initialized. The intratier TransitLink is an internal logical switch that connects the distributed and service routers on a gateway, and it is configured automatically when the service router is created.
Here's how I understand this one: A. Manually create a gateway interface and mark it as transit. - No, it's automatic. Cross off "A" B. Automatically created when SR is initialized. - Yes, this is how it happens. SR is initialized and talks to the DR. C. Automatically created when DR is created. How? DR's can exist without SRs... seems silly. D. Manually create external uplink interface and mark it as transit. - No, it's automatic Process of elimination yields "B".
B is correct
Answer B seems correct. Found in the ICM 4.0 book : "The intratier TransitLink connection is also created when a service router is created. It is an internal logical switch between the distributed and service routers on a gateway. By default, the intratier TransitLink has an IP address in the 169.254.0.0/24 subnet range. "