1 MNET:MIT.SLFP Last updated: 10 November 1987 This file
contains technical documentation of the MIT Serial Line Framing
Protocol, as implemented in the Merit Computer Network. It was
retyped from the original information from MIT on 11/10/87.
Appendix I: Serial line Framing Protocol (This description is
from a very old file written when we were first implementing the
protocol. Details are still accurate, though.) This is
preliminary documentation on the serial line protocol used
between the IBM PCs and the PC Gateway. The protocol has two
levels: the low-level protocol (LLP) and the local net protocol.
The low level protocol wraps a packet and delivers it to the PC
Gateway. The local net protocol tells the PC Gateway what kind
of packet it is. Currently there two types of packets: Internet
and Address Request. When the PC Gateway receives an Internet
packet, its action is to forward the internet packet to a
process which checks the packet for validity and then sends it
to the net. On receipt of an Address Re