Bulletins from the Pacific Packet Radio Society - page 012

80 Reserved
80-EF Repeater connection for stations not using IP protocol headers
FO-FD Network repeaters, servers and gateways using IP headers
FE User station common calling address, IP headers in use
FF Broadcast, all -parties-addressed, no IP headers

Perhaps a block of addresses should be reserved for future use by another protocol, or for special cases, or for other currently unforeseen emergencies.

19. If repeater with address F9 receives a packet from machine Fl, it would look into its routing tables and find the next repeater which should receive the packet, say FC. It would put FC into the outgoing address, and retransmit the packet. Thus we utilize selective addressing and can aim the packet in the direction we want, based on our routing decision.

Selective addressing could also be implemented by using the "source route" option in the Internet Protocol. The repeater which is the initial link in the chain is listed as the first destination in the destination address field. The address(es) in the source route option will then replace the initial repeater's address and speed the packet on its way.

20. In addition to the address ranges, we have control over the type of packet sent as defined in the HDLC control field. What use should be made of Non-Sequenced-Information (NSI) field packets (and other types)?

21. Protocol should allow host machines to simultaneously handle multiple connections with different users. Also, multiple independent streams, e.g. , console I/O and printer I/O simultaneously, should be easily implemented.

22. What requirements do real-time broadcast protocols impose on the design?

23. Summary of various cases:
I. Direct A-| B
II. Single Repeat A -| R1 -| B or A -| Rn -| B
III .Double Repeat A -| R1 -| R2 -| B
IV. Linking A -| R1 -| R2 -| ... Rn ... -| B
V. Repeater Command A -| R1 -| A
VI. Broadcast A -| Rn -| B, C, D, E, ...

24. A repeater can be addressed in several different ways:

Use of its own callsign in an IP header
Use of its network node address in the IP header
Use of its own special F0-FD address.

25. Various classes of packets which a repeater will have to

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