🚀 go-pugleaf

vjs@rhyolite.wpd.sgi.com (Vernon Schryver) writes:
+---------------
| I don't know about XNS or IPX, and I can't find any equivalent to the
| IP offset or MF bits in the "Internet Protocol" described in my old
| Xerox XNS documents.
+---------------

There aren't any. XNS doesn't fragment. From the XNS ITP manual [XSIS 028112],
page 21 [ALL CAPS were italics in the original]:

    Internetwork routers must at least forward internet packets of
    this size [576]. INTRANETWORK FRAGMENTATION AND REASSEMBLY must
    be performed by the level zero protocol for transmission systems
    that cannot transmit a correct length internet packet. Two comm-
    unicating clients are free to negotiate a different maximum length.
    
    If the processes negotiate an increase in the maximum length of
    an internet packet, consideration must be given to the possible
    problems of any internetwork routers that may be in the communc-
    ations path. These routers are not a party to the negotiations,
    and in fact cannot be, since the route is dynamic. If a router
    encounters a packet which it cannot handle, it will discard it.
    There is no automatic way to determine whether the routers along
    the way will or will not support packets of a particular size.

I would suppose IPX is the same.


-Rob

-----
Rob Warnock, MS-9U/510		rpw3@sgi.com
Silicon Graphics, Inc.		(415)390-1673
2011 N. Shoreline Blvd.
Mountain View, CA  94043