Subject: RE: [netatalk-admins] Using netatalk in a large, mission-critica
From: Douglas M. MacFarlane (madmac@mcs.net)
Date: Thu Sep 24 1998 - 12:15:08 EDT
Do you have an extended cable-rnage configured on your network?
i.e., did you allocate just 1 appletalk network (cable-range 45-45,
for example), or did you allocate and extended range (cable-range
46-55) which will allow hosts to connect via the high nodenumbers
theat they want, and just use the "next" network in the range for
that LAN.
Doug
On 24 Sep 1998, Peter Gutowski wrote:
> Sean A. Snyder wrote:
> > Greetings!
> >
> > I'm writing to find out if anyone on this list is using netatalk in a
> large
> > environment (larger than 300 users per server) that is 24x7, or nearly
> 24x7?
> >
> > I'm in a situation where with a product similar to Netatalk where I
> find
> > myself limited to 127 appletalk connections to my file server.
> Apparently,
> > this limitation is based upon the 8-bit socket identification number in
> older
> > versions of the Appletalk stack. According to section 4-5 of Apple's
> "Inside
> > Appletalk" book (copywrite 1990), sockets 1-127 are reserved for
> > statically-assigned sockets (SAS's), leaving sockets 128-254 for use by
> our
> > AppleShare clients, hence we get errors when we try to make that 128th
> > connection to the server.
> >
> > Does anyone know if Netatalk is also subject to this 8-bit
> > socket-identification number issue, or has a workaround been found or
> been
> > created in newer versions of Appletalk? Will using the asun IP patches
> get me
> > around this limitation if it exists (i.e. unlimited number of IP
> connections)?
> >
>
> Sockets are a node-level construct. As an AppleTalk device speaks to
> similar
> device it's address is made up of a 16-bit NET number, 8 bit-node number
> and
> and 8-bit Socket number. The reference you make is to a socket number
> whereas
> your interest seems to be in node numbers Which i believe is an 8-bit
> unsigned
> value yielding 254 possible entries (node=0 and node=255 having special
> meaning.
>
> With >254 nodes sounds like partitioning your network is in order.
Douglas M. MacFarlane
Principal, Vauban Industries
madmac@mcs.net
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