[Info-vax] tcpip gateway question

[Richard Brodie]

"Anton Shterenlikht" <mexas at bristol.ac.uk> wrote in message 
news:mailman.7.1253014955.18305.info-vax_rbnsn.com at rbnsn.com...

> On Tue, Sep 15, 2009 at 11:26:37AM +0000, Jan-Erik S?derholm wrote:
>> DECnet when started change the MAC address. And it's built up
>> based on the DECnet area.node address in som e way, if I'm not wrong.

Indeed, take last two bytes as little endian, 10 low bits node, 6 high area.
Since you aren't spanning byte boundaries in this particular case this reduces
to AA-00-04-00-node-(area*4).

> So really I either have to use EWB0 (second) interface instead of EWA0,
> or disable DECnet?

I'm apparently missing some context here. Normally it doesn't matter; unless
you have something like a MAC based security policy. Usually, start DECnet
early and forget the real hardware address.

> Is it correct that DECnet is not required for VMS cluster or for TCP/IP?

Yes. You have to move the initial MOP loader part from NCP into LANCP
if you have satellites. TCPIP doesn't care at all.