Well, my requests to the networking group for some networking changes,
ended up being sent to a "level 3 guru". At least I could find some
common terms with networking, but this guy is speaking gibberish<G>.
I wasn't paying attention to the IP addresses I've now been assigned, so
I let this one slip thru. They gave me 192.168.192/22. Huh?
I get the impression that the mainframe now own:
192.168.192.x
192.168.193.x
192.168.194.x
192.168.195.x
So, a thousand addresses should be sufficient<G>. Actually, I made so
many requests that they may be confused. So I'm accepting them and
trying to do things in a piece meal fashion.
Anyway, in z/VM 5.1, I need a subnet mask and subnet value for this. It
doesn't seem simple. This VM image will have 192.168.193.3. My initial
guess is a subnet mask of 0.0.255.0 and a subnet value of 0.0.3.0 but
that didn't work in my first test. (At this point I don't know if the
"level 3 guy" made the changes correctly or if I didn't make the changes
right. (Right now, this is on the unused IFL side, so I have time for
testing.) Eventually, I'll put in VM's vswitch for support of the Linux
images.
Background:
They are not going to be routed.
They are part of a virtual lan assigned to the mainframe.
They are "seg 3". I don't know if that is a term, or a label, like
"third segment" or what.
What I wanted:
We have 2 OSA card, each with 2 GBE ports.
We have a 390 engine and an IFL.
I see a 390 lpar plus multiple IFL lpars (all running under z/VM images).
A linux image may be IPL'ed in any of the lpars (so a LPAR can be taken
down for maintenance).
I wanted all IP addresses to be available on any of the 4 GBE fibers.
So I think that is the virtual LAN that networking setup. Hence they
don't need to do routing. I think that is good.
Eventually, we will be plugging in the 3 100mb ethernet connections from
the IBM DS6800 dasd subsystem as the DS6800 calls home over the
Internet. Perhaps even the 3 100 mb ethernet connections from the z/890
(perhaps not on this one as the call home function is still over dial up
phone).
Also I have two OSA-ICC cards. Each card has two ports of 1000 Base-T
copper connections. One port on each card is configured as ICC. The
other port on each card is another OSA port, not used at this point.
Boy, a single LPAR with a single IBM 3172 ethernet connection, was much
simpler<G>. But there are many reasons for going to the more
complicated setup.
Thanks
Tom Duerbusch
THD Consulting
