HP 100Base-T Hub 8 Installation and Reference Guide
Hardware Reference
4-3
For example, if network utilization reaches 1%, the LED labeled 1% will
light up. However, if network utilization rises above 1% (e.g., 12%), the
LED labeled 12 and all the other LEDs before it (i.e., 1 and 6) will also
light up in rapid succession. These indicators monitor the share of valid
network frames handled by the hub within a 100 Mbit/s bandwidth. They
provide a quick way to monitor the current traffic load relative to the
network’s capacity.
Col
Color:
Yellow
Function:
Intrahub packet collision
The relative rate of collision is indicated by the degree of brightness and
blinking of the Col indicator.
Note: If the hub displays a high collision rate, check to see if any of the connected
devices are malfunctioning or if a loop has been formed in your network
connections. Otherwise, you may need to reconfigure your network to balance
the traffic load.
Port Status Display
Link/Activity
Color:
Green
Function:
Detects a successful connection to another hub or end node on
this port.
Detects packets being passed to a port on the hub.
Condition
Indication
ON/BLINKING
Hub has detected two or more packets on the hub have run into each
other, blocking successful arrival at their destination.
OFF
No collisions have been detected.
Condition
Indication
ON
Hub detects a connection to another hub or end node on this port.
OFF
Hub does not detect a connection to another hub or end node on this port.
BLINKING
Hub detects packets being passed to this port.
100hub8.book : 100hub84.fm Page 3 Monday, April 27, 1998 10:06 AM
