【答题赢鸿鹄币】LISP infrastructure

小乔

QUESTION 151
Which two LISP infrastructure elements are needed to support LISP to non-LISP internetworking? (Choose two.)
A. PETR
B. PITR
C. MR
D. MS
E. ALT

选详细解释给予20鸿鹄币奖励

lesj163

AC
Proxy Egress Tunnel Router (PETR): A LISP device that de-encapsulates packets from LISP sites to deliver them to non-LISP sites.
When the xTR in LISP Site 1 want to sends traffic to Non-LISP site, the ITR (not PETR) needs a Map Resolver (MR) to send Map Request to. When the ITR (the xTR in LISP Site 1 in the figure above) receives negative MAP-Reply packet from MR, it caches that prefix and map it to the PETR.