I understand that the following is the output when using NIM module that does not support PPP and SLIP. The text in bold states encapsulation ASYNC. What does it imply in terms of using a router with NIM-16A or NIM-24A module where encapsulation PPP was used in earlier configs and what is the migration path for such devices.
Router#show interfaces async 0/1/0
Async0/1/0 is up, line protocol is down
Hardware is NIM-24A
MTU 1500 bytes, BW 17 Kbit/sec, DLY 0 usec,
reliability 25/255, txload 1/255, rxload 1/255
Encapsulation ASYNC, loopback not set
