| Title: | DEChub/HUBwatch/PROBEwatch CONFERENCE |
| Notice: | Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7 |
| Moderator: | NETCAD::COLELLA DT |
| Created: | Wed Nov 13 1991 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 4455 |
| Total number of notes: | 16761 |
The DECserver 900TM has 2 backplane connectors shown on the HUBwatch
display via LAN Interconnect display. I was told once that one of
these was for connection to the Ethernet which would have the "service"
systems and the other was for downline loading.
My customer has a DEChub 900 which he will be putting a DECseitch 900EF
and a DECserver 900TM in slots 1 & 2 and an identical copy in slots 7 &
8. Slots 1 & 2 will use IMB #3 for connection and slots 7 & 8 will use
IBM #4. This setup has two separate FDDI rings connected to 2
separate groups of terminal users.
This is easy. Now the hard part.
They want to put an Additional DECserver 900TM in slot #5. They want
the users on this terminal server to be able to access systems on both
FDDI rings (will the systems on different rings still remain
autonoumous).
My question:
Could I connect 1 of the DS900TM backplane connectors to IMB #3 and the
other one to IMB #4 and provide this type of interaction?
Thanks,
Mark
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2288.1 | Nope | TOOK::ALBRIGHT | Born to DECserver | Wed May 17 1995 18:07 | 7 |
Sorry, only one Ethernet at a time. You might think of the Ethernet
interface as a single pole, double throw switch. If one pole is on an
IMB selected by Hubwatch to service software loads and dumps, and the
other pole is on an IMB selected to handle normal traffic, you can only
be on one or the other, not both.
Loren
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| 2288.2 | Perhaps use a spare Switch port ? | MSDOA::REED | John Reed @CBO, (803) 781-9571 NIS Networker | Wed May 17 1995 20:08 | 20 |
You say that this config (2 DECservers, each on Separate FDDI, in one
HUB) is about to receive another DECserver, that needs connection to
each FDDI, but you don't wish to join the FDDI's.
If the FDDI into the HUB is through two DECswith 900EF's, then you can
devote a new IMB to a new Ethernet LAN, and push one port of Each of
the two switches to the new IMB. Then assign a filter to pass only the
new DECserver 900TM's MAC address on each new switch port. Perhaps
the spanning tree protocol would need to be fussed with on the port
protocol filters, to keep the two FDDI's from trying to join up, or
disable one side of the link. You must be certain when joining the
two networks at this point, that the FDDI's are not joined somewhere
else by a router or bridge.
Haven't tried it, and don't know for sure if it will work.
JR
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