[Info-vax] tcpip gateway question

[Anton Shterenlikht]

On Tue, Sep 15, 2009 at 11:26:37AM +0000, Jan-Erik S?derholm wrote:
> > In addition to my previous MAC change observation, I discovered
> > that all nodes in the cluster have their current MAC addresses
> > for the first interface, either EWA0 (alpha) or EIA0 (i64) changed
> > to a range of incremental MAC numbers from AA-00-04-00-03-08 to
> > -06-08 (4 nodes). However, all MAC addresses for second interfaces,
> > EWB0 or EIB0 are left at default settings.
> > 
> > I'm really puzzled by this. Is this an expected behaviour?
> > Is this something to do with VMS cluster or DECnet?
> > Can I insist that the current MAC address for a particular
> > interface is left as default setting?
> > 
> 
> 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.

yes, it is in DECnet-Plus for OpenVMS Network Management, section 9.1,
table 9-1:

	"... in the format AA-00-04-00-xx-xx, where
	xx-xx is calculated from Phase IV node address."

I guess I have to reregister my ip address to this DECnet modified
MAC address. Or maybe better to assign the Uni ip address to the
second, unmodified interface, to make it independent of VMS cluster
configuration?

many thanks again

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 331 5944
Fax: +44 (0)117 331 5924