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Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) · Cisco
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pitr is ingress so is recieving the egress is sending out the other side of the device
"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. "