[Simh] Cluster communications errors

[Paul Koning]

> On Jul 18, 2018, at 5:03 PM, Hunter Goatley <goathunter at goatley.com> wrote:
> 
> On 7/18/2018 3:38 PM, Hunter Goatley wrote:
>> I know it's currently as set to autosense. I'll try forcing the speed and duplex.
>> 
> 
> I was told:
> The router is reporting that the port auto-sensed 1Gbit duplex, but I just manually forced it to that to be sure.
> No change in behavior, unfortunately.
> 
> Hunter

You mentioned that some of this is real hardware and some is simulated.  It might be helpful to post a map showing the setup, including interface models, link speeds, and switch models.

Are the interface speeds all the same?  LAVC was built for 10 Mbps Ethernet, and while running it faster should be ok, running mixed speeds may create more congestion than the protocol is comfortable with.  While any Ethernet protocol has to handle packet loss, some protocols assume packet loss is rare.  DECnet wouldn't, but the cluster protocols (and LAT, for that matter) do.  

Is there any way to show packet loss counts?  Can you run DECnet, and if you put a significant load on DECnet connections, do the DECnet counters show any errors?

	paul