| 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 |
What LED display is to be expected for a DECconcentrator 900MX M port that is connected to the A port of dual-homed station, when the station's B port is in use and the A port is in standby? I thought I understood the LED description of the Installation manual, but I'm not seeing what I expected when connected to several IBM RS6000 stations. HUBwatch is telling us that the concentrator ports in question are connecred to A ports and are in standby. Malcolm
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2249.1 | NETCAD::B_CRONIN | Thu May 04 1995 12:07 | 19 | ||
What we hope to see is a PHY LED that is blinking green/amber. This
does not always happen, for reasons that are too detailed to
type right now, but here's some idea of what's happening.
When a station is dual homed, the A-M link is constantly trying
to form a connection - but the DAS station prevents the completion of
the connection (it knows that it's B-M is active, and that it wants to
be dual homed). When we see this behavior on the M port we basicly
make an educated guess that this is a dual homed situation, and
blink the light accordingly. Sometimes if the conditions aren't quite
what we expect we guess wrong, and the light doesn't come on. ANSI
has no standardized method to signal this condition, so we aren't in
violation of any standard; there is no standard way to announce a
dual homed condition.
The upcopming release has some changes that minimize the probability
that we will guess wrong. You might load the new code when it becomes
available, and see if that helps.
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| 2249.2 | Thanks.... | MSDOA::BURNS | Thu May 04 1995 12:16 | 7 | |
Thannks for the help. If we get to try the new code at this site, I'll try to remember to post the results here. Malcolm | |||||