[Info-vax] VMS QuickSpecs
Stephen Hoffman
seaohveh at hoffmanlabs.invalid
Thu Aug 13 11:06:58 EDT 2015
On 2015-08-13 14:50:44 +0000, Dirk Munk said:
> VSI TCP/IP Services (minimum Version 5.7-13ECO05B) is needed for using
> IP for cluster communication."
>
> I seems to remember that other TCPIP stacks were also supported in the
> past, that is no longer the case? Secure cluster communications could
> be established with SSH, I see no mention of that either.
That reference is for IPCI — clustering over IP — a feature which was
added in V8.4, and which has always specifically required TCP/IP
Services.
<http://de.openvms.org/Spring2009/07-OpenVMS_clusteroverIP.pdf>
For completeness as your question could be inferred to indicate some
confusion over the underpinnings of clustering, clustering on a local
or bridged LAN does not use DECnet nor IP, it uses Ethernet SCS
datagrams. Clustering over IP only operates on remote IP links, and —
unless you don't really need the IP link that you're using, and have a
redundant LAN path available — IP clustering only operates with all
hosts in the cluster running OpenVMS V8.4 or later. This due to the
requirement for total connectivity (boxes prior to V8.4 can't use
IPCI), and due to the preference to use SCS and not IP over LAN paths
(as SCS is more efficient than IPCI).
Hopefully somebody gets a chance to overhaul the whole of the IP
configuration and management interface with the new IP stack due to
arrive.
--
Pure Personal Opinion | HoffmanLabs LLC
More information about the Info-vax
mailing list