Q18Infrastructure
Which task is a LISP ITR responsible for?
← → navigate · a answer
Community votes
Discussion · 4
C 4
Selected Answer: C
Given answer is correct.
LISP Ingress Tunnel Router (ITR)
An ITR is responsible for locating EID-to-RLOC mappings for all traffic destined for LISP-capable sites. When the ITR gets a packet destined for an EID, it first checks the EID in its mapping cache. If the ITR finds a match, it encapsulates the packet inside a LISP header with one of its RLOCs as the IP source address
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_lisp/configuration/15-mt/irl-15-mt-book/irl-overview.pdf
C 3
Selected Answer: C
A. Map Resolver receives the Map Request messages and forwards them to the ETR. The ETR replies to them
B. Basically all routers do this.
C. ITR
D. There is no such LISP message as a "registration request". The message is called "Map Register" message, it is sent by the ETR and processed by the Map Server
C 3
Selected Answer: C
The Ingress Tunnel Router (ITR) is in charge of sending map requests and handling received map replies to resolve EID-to-RLOC mappings. Also, on the data plane side, the ITR encapsulates packets for sending to remote LISP sites or natively forwards packets to non-LISP sites.
C 3
Selected Answer: C
ITR:
1. ITR sends a map request to the Map Resolver (MR) and handles the reply to resolve the EID-RLOC (Routing Locator) mapping.
2. Encapsulating packets to send to remote LISP sites
3. Forwarding packets to non-LISP sites