Which LISP infrastructure device provides connectivity between non-LISP sites and LISP sites by receiving non-LISP traffic with a LISP site destination?
Further simplified:
PITRs are for Non-LISP > LISP
PETRs are for LISP > Non-LISP
Always remember who is performing encapsulation and de-encapsulation. xITRs always encapsulate, whether [FROM] a LISP-RLOC or Non-LISP Site; while xETRs always de-encapsulate, whether [TO] a LISP-RLOC or Non-LISP Site.
"A PITR is a LISP Infrastructure device that provides connectivity between non-LISP sites and LISP sites by attracting non-LISP traffic destined to LISP sites and encapsulating this traffic to ETRs devices deployed at LISP sites. "
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/5-0/LISPmobility/DCI_LISP_Host_Mobility/LISPmobile_2.html#:~:text=%E2%80%93%20Proxy%20ITR%20(PITR)%3A%20A,devices%20deployed%20at%20LISP%20sites.
" An ITR is a LISP Site edge device that receives packets from site-facing interfaces (internal hosts) and encapsulates them to remote LISP sites, or natively forwards them to non-LISP sites. "
Proxy ITR (PITR): PITR is a LISP infrastructure device that provides connectivity between non-LISP sites and LISP sites by attracting non-LISP traffic that is destined to LISP sites and encapsulating this traffic to devices of ETR that are deployed at LISP sites.
Q95. Which LISP component is required for a LISP site to communicate with a non-LISP site?
A. Proxy ITR
B. ITR
C. ETR
D. Proxy ETR
^^^ How is the answer to this one D - Proxy ETR?
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