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You are configuring a switch as a LISP xTR. You plan to use the LISP xTR when deploying redundant map servers. Which action do you take?
A. Register the LISP xTR to the anycast IP address of the map resolver.
B. Register the LISP xTR to the IP address of each map server.
C. Configure the map-notify group command by using the anycast IP address of the map resolver.
D. Configure the map-notify group command by using the IP address of each map server.
Correct Answer: B
Explanation/Reference:
Explanation:
Map-Server and Map-Resolver Considerations
The Map-Server and Map-Resolver are critical components in a LISP deployment. They provide capabilities to store and resolve the EID-to-RLOC mapping information for the LISP routers to enable routing between LISP sites.
The Map-Server is a network infrastructure component that learns EID-to-RLOC mapping entries from ETRs, which are authoritative sources and which publish (register) their EID-to-RLOC mapping relationships with the Map-Server. A MapResolver is a network infrastructure component that accepts LISP-encapsulated Map-Requests, typically from an ITR, and finds the appropriate EID-to-RLOC mapping by checking with a co-located Map-Server (typically) or by consulting the distributed mapping system.
This section discusses Map-Server and Map-Resolver deployment considerations for an enterprise data center LISP deployment. Note that you should deploy redundant standalone coexistent Map-Servers and Map-Resolvers. When redundant standalone Map-Servers and Map-Resolvers are deployed, all xTRs must register with both Map-Servers so that each has a consistent view of the registered LISP EID namespace. For Map-Resolver functions, use of an anycast address is desirable, because it will improve mapping lookup performance by choosing the Map-Resolver that is topologically closest to the requesting ITR.
https://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-693627.html
Quote: For Map-Resolver functions, use of an anycast address is desirable, because it will improve mapping lookup performance by choosing the Map-Resolver that is topologically closest to the requesting ITR