[Info-vax] SHADDETINCON, SHADOWING detects inconsistent state

[Phillip Helbig---remove CLOTHES to reply]

In article
<6989d626-4fde-4f08-90aa-81c3b22349a5 at e1g2000pra.googlegroups.com>, H
Vlems <hvlems at freenet.de> writes: 

> Actually I don't think power is an issue. Phillip lives in Germany and
> mains power is rather reliable.

Indeed.  I don't remember having an outage since I've lived here.

> My suggestion would be to have a good look at the network. The systems
> mentioned are all
> 10 Mb/s systems. So they're connected with thinwire coax or have UTP
> transceivers on their AUI ports.

The latter in the case of the VAXes, the former in the case of the
ALPHA. 

> (Unless Phillip runs a 10BASE5 "classic" ethernet in his house, which
> I doubt :-)

Actually, I have such cables, but I've never used it.

> Thinwire cables may go bad and so may transceivers fail. As I read the
> original post, the number of errors seems
> to increase over time which indicates failing hardware.

The number of errors (e.g. $ SHOW ERROR) remains constant, but the
failures have become more frequent.

> Look at the error counters of other protocols, such as LAT, DECnet or
> IP. Especially LAT since it is very sensitive to problems
> in the physical layer and may provide you with clues.

Such errors look OK.

I've now made the swap.  We'll see what happens!