Post by Edgar Ulloa
I have this scenario
3 ovms 8.4 nodes each in a city
node B communicates well with A and C
nodes a and c there is no communication between them.
If I have no way to intercommunicate them via routers or physical gategays,
is there any way to make them communicate with each other using node b
as if it were a gateway?
the communication will be sftp ssh telnet
If you're referring to clustering and not networking...
SCS does not support nor implement SCS routing.
Each cluster member host needs a direct path to every other host within
This is the so-called rule of total connectivity,
Cluster communications are available via select point-to-point or
multi-point links (e.g. DSSI, CI), via LAN, or via bridged LAN, or via
SCS over IP, or a mixture.
Cluster communications links must officially be a minimum of slow
Ethernet (10Mbps) speed, but links that glacial are badly prone to
For this cluster configuration...
If a cluster connection from "A" to "C" via "B" is unavailable, "A" and
"C" will detect the cluster partitioning and will stall pending manual
You'll either need a link from "A" to "C" that does not pass through
"B"—whether SCS via IP or otherwise—for this to work when the "B" site
Or you'll want to downgrade "A" or "C" to a non-clustered
configuration, and relocate periodic backups or otherwise replicate
data to the downgraded site.
If you're referring to IP networking and not clustering...
Your link choices are much wider than with clustering, but you'll still
need local internet connections or dedicated links around the "B" site
But if you're not interested in link redundancy, then it is
possible—awkward, clumsy, expensive—to set up OpenVMS as either a
DECnet router or an IP router.
With IP and with no interest in link redundancy, it'd be fairly typical
to have "A", "B", and "C" in separate IP subnets, and then install a
(cheap) router at "B", and off you go.
OpenVMS—pretty much any server—makes a rotten IP router. Or DECnet
router, for that matter.
If you're centrally asking how to set up OpenVMS as an (awkward) IP
router, check the docs for whichever IP stack you're using.
Though far more typically, existing IP network links provide this
configuration without using the OpenVMS host at "B" site as a router.
Pure Personal Opinion | HoffmanLabs LLC