🚀 go-pugleaf

In <pauln.725193421@nuustak> I wrote:

> The most serious problem to date had to do with the token-ring connection
> between the IBM and the Sun.  In their SNA/3270 manual, Sun recommend a
> MAXDATA value of 265.  The word "recommended" should be replaced by
> "mandatory".  However, this only applies to links via 37x5 FEPs, and not
> via 3174s.  In the case of a 3174 connection, this must be configured on
> the control unit itself.

According to someone at Sun, the new (version 7.01) Sunlink SNA/3270
software allows MAXDATA to be configured on the Sun.  I will try this 
when I get back to work at the beginning of January, and report back.

> * Multiple gateways per TRI/S adapter (we have had up to three PUs per
>   adapter, with up to 200 LUs per PU)

Apparently, genuine IBM 3174s do not support this.  We have Mohawk MC400
controllers, which allow both MAC and DSAP addresses to be specified
for each downstream PU, and I had three gateways running on a single
TRI/S card at one stage (DSAP = 04/08/0C).  If you do this, make sure 
that you set the SSAP on the Sun to the same value (Sun DSAP = 04, 
SSAP = 04/08/0C, depending on which gateway it is).
 
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 Paul Nash                                         paul@frcs.Alt.ZA
 Box 12475, Onderstepoort, 0110 South Africa         +27-12-5611879

 "Standards are great -- everyone should have one" (Kent Landfield)