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- Path: sparky!uunet!ogicse!psgrain!hippo!ee.und.ac.za!csir.co.za!frcs!paul
- From: paul@frcs.Alt.ZA (Paul Nash)
- Newsgroups: comp.protocols.ibm
- Subject: Re: Sparc-based SNA-TCP/IP gateway: initial impressions
- Message-ID: <1992Dec26.072113.26790@frcs.Alt.ZA>
- Date: 26 Dec 92 07:21:13 GMT
- Article-I.D.: frcs.1992Dec26.072113.26790
- References: <pauln.725193421@nuustak>
- Organization: Free Range Computer Systems CC
- Lines: 28
-
- 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).
-
- ---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---
- Paul Nash paul@frcs.Alt.ZA
- Box 12475, Onderstepoort, 0110 South Africa +27-12-5611879
-
- "Standards are great -- everyone should have one" (Kent Landfield)
-