HP 10BASE-T Betriebsanweisung PDF herunterladen (Seite 15)

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Switching Hub Features

How the Hub Works

Switching Hub Features

If the Col LED is on most of the time because of high traffic levels, you can

optimize your network by separating nodes onto different segments. Each

segment is a collision domain. By adding the optional Management Module to

your stack of hubs, you can use management software to specify which

segment each node will be placed on.

Auto-Partitioning

The hub will automatically partition (temporarily disable) a network port for

the following reasons:

■ a collision condition exists for an excessive duration (between 1024

and 2048 bit times)

■ a collision occurs during each of 32 consecutive attempts to transmit

■ Installed optional transceiver has SQE test enabled instead of

disabled

The hub monitors the partitioned port and automatically re-enables the port

when a minimum length packet can be successfully transmitted or received

without a collision occurring.

Excessive collisions may be caused by faulty wiring. If a port’s transmit

(Tx +/-) wires have been shorted to the receive (Rx +/-) wires of any port, a

collision will be detected when that port attempts to transmit. If a port’s

receive (Rx +/-) wires are not connected properly, collisions will occur

because the hub cannot detect the presence of network traffic on that port

and may thus transmit at inappropriate times.

A port may occasionally also become partitioned when network traffic is

extremely heavy causing an abnormally high collision rate. If collisions are

high, distribute your users onto two, three or four segments using the optional

Management Module.

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HP 10BASE-T Betriebsanweisung Seite 15