| >> Using HUBwatch, Can I manage a standalone repeater 900TM with
>> a HUBone docking station?
Yes. Hubwatch can reach and manage the 900TM either in-band or
out-of-band, through the docking station's OBM port.
>> Will the Repeater 900TM auto-disable a port if it detects an open,
>> short, too many collisions, runts, or jabbers? And will it
>> Auto-enable?
Some types of opens can put the port in a "link test fail" state. In
this state, link pulses continue to be transmitted to the port (in
order to detect when the problem has been fixed), but transmission of
repeater traffic to the port is supressed. Opens on the transmit pair
can not normally be detected and thus the 900TM will take no action.
When link pulses (or a data packet) are received from the port, it
exits the "link test fail" state and resumes normal operation.
Some types of shorts can be detected because they may short receive
signals such that link test fails (described above), or may short
transmit to receive such that collisions occur all the time (see
below). Other types of shorts cannot be detected (such as the transmit
pair shorted together).
Regarding collisions, the 900TM follows 802.3 standards. If it
experiences 32 consecutive collisions on transmit, the port is "auto
partitioned." In this state, it continues to transmit to the port (in
order to detect when the fault condition clears) but ignores receive
data from the port. When the fault is cleared (a data packet longer
than 512 bit times is transmitted or received without collision) the
port automatically un-partitions, returning to normal operation.
No action is taken on runts (note that the number of runt packets is
counted on a per-port basis).
Jabbers such as a babbling end device are chopped up by the 900TM.
Every 65536 bits, the packet is stopped and a 9.6us nominal gap
is inserted. No collisions are forced and the port is not disabled.
|
| > - Other than using HUBwatch and a card with the management agent option, can I
> use MCC/Netview to completely manage all functionality of multiple bridge
> 900EF's plugged into the same HUB 900 if I assign a TCP/IP address to each
> bridge? I know the
Anything that talks SNMP can manage any of the 900 DECbridge/DECswitches
> - Using HUBwatch, Can I manage a standalone bridge 900EF with a HUBone
> docking station?
Using HUBwatch you can manage any standalone 900 module.
- Using HUBwatch, Can I manage a standalone repeater 900TM with a HUBone
docking station?
Using HUBwatch you can manage any standalone 900 module.
Tom Hood
HUBwatch
|