| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3418.1 | You probably have an even number of crossovers... | NETCAD::BATTERSBY | Don't use time/words carelessly | Wed Apr 03 1996 10:05 | 10 |
| I'm not familiar with the UTP Ethernet port of the DECserver 700
as to whether it has an internal crossover on its UTP port.
I suspect, based on what you describe that when using the BN24F
cable you have an even number of crossovers, so one negates the
other. The DECswitch 900EF which I am familiar, does not have internal
crossovers on its Ethernet UTP ports. So you are probably correct with
your second choice of the BN25G straight through cable for your
connection between the 900EF and the UTP Ethrnet interface.
Bob
|
| 3418.2 | BN25G..BN24F? | SALEM::HARRIS_M | | Wed Apr 03 1996 10:58 | 9 |
| Thanks,
I've tried the BN25G on the 2 twisted pair ports, each running to the
decserver and the other to the alpha station. This doesn't work, as the
network cards don't become active. If I use the bn24f atleast I'm able
to bring the decserver and the alphastation up and PCM comes up fine.
I can loop thru the 900ef via utp --FDDI- to all other nodes in the
cluster.
Matt
|
| 3418.3 | Please describe what you see 900EF port state doing | NETCAD::BATTERSBY | Don't use time/words carelessly | Wed Apr 03 1996 11:10 | 8 |
| Can you describe what the port state led does on the 900EF UTP
port that is connected to the DECserver 700 UTp port for each
type of cable for me? Then I should be able to tell you which
one is creating the link correctly. Given that one of the 2 cable
types is probably making the link, the problem is likely somewhere
else.
Bob
|
| 3418.4 | TWISTED.... | PTOJJD::DANZAK | Pittsburgher � | Fri Apr 05 1996 11:23 | 11 |
| Digital REPEATERS (which connect to end user devices) provide a TWIST
in the RX/TX pair (hence the "X") on their pannels. The DECswitch
(designed to connect LAN-to-LAN) provides no RX/TX twist....so you need
a TWIST in the cable not a straight thru one.
So, get a twisted cable (damnifiknow the part number) and it will work.
(Or put a TP adapter on the AUI and a non-twist will work there)
ttfn,
j
|