[Info-vax] What would you miss if DECnet got the chop? Was: "bad select 38" (OpenSSL on VMS)

[Johnny Billquist]

On 2016-10-06 09:25, Dirk Munk wrote:
> Well then, let me give you a very good reason to scrap Phase IV. These
> days it is normal to use many Ethernet interfaces on a system, hook up a
> system with 4 Ethernet interfaces to one switch and 4 Ethernet
> interfaces to another switch (redundancy) for instance. Every interface
> can be used for a specific purpose. Datacenters are designed around such
> infrastructure principles.
>
> What happens when you do that with Phase IV, or Phase V in Phase IV
> compatibility mode? Every interface gets the same Phase IV MAC address,
> AA-00-04-00-XX-YY. Three of the four Ethernet interfaces will be
> blocked, and if the switches are connected, seven of the eight will be
> blocked.

You won't get any argument from me on that one. It's a known limitation 
is the design of Phase IV on ethernet.

I could possibly argue that if you want redundancy, you should not hook 
them all to the same ethernet to begin with, because that halfway 
defeats the redundancy argument. But that's your choice.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol