[Info-vax] DNFS1ACP using 100% of CPU

[Jan-Erik Soderholm]

Volker Halle wrote 2013-10-16 16:01:
> The OpenVMS LAN Driver even tries to help you and reports 'possible
> Duplex mode mismatch'. For connections to an unmanaged switch, you need
> to set the LAN Interface to AUTO, because an unmanaged switch will most
> likely have all it's ports set to AUTO.
>
> SRM and LANCP just report, what you set the LAN Interface to. Because
> you've set the Interface to EWA0_MODE FASTFD, LANCP just reports that
> setting.
>
> As I wrote previously, since OpenVMS V7.3-2 the OpenVMS LAN Driver
> correctly does auto-negotiation - it was less than perfect with older
> Version ! The fact that 'IP seems' to work only shows that
> re-transmissions automatically take care of your wrong configuration.
> DECnet and LANCP actually report the problem. That's the OpenVMS way of
> handling problems...
>
> Volker.
>

Had a similar problem some year ago. In that case it was an managed
switch but it was configured as "auto" and the Alphaserver was set
hard to FD100. When the switch could not negotiate, it defaulted
back to single duplex. That "worked" until you tried something
like a larger FTP transfer. After setting both ends hard to FD100
all these problems went away.

For a simple switch that is set hard to "auto" I would also
recomend "auto" at both ends.

Jan-Erik.