Sun Microsystems SunFastEthernet Adapte - Manual (Page 56)

5-2 SunFastEthernet Adapter User Guide—November 1994
5
Note – If you do not see a “10 or 100Mbits/sec Link Up” message, then the
link is down and the probable cause could be a disconnected cable, transceiver
or hub.
5.1.2 10/100Mbps Link Up Using MII interface Connector
If your SunFastEthernet channel is connected to a 10 or 100 Mbps network
through the MII interface connector you will receive a Link Up message
whenever you boot the system or disconnect and then reconnect to the
network.
For 10Mbps the message is:
For 100Mbps the message is:
Note – If you do not see a “10 or 100Mbits/sec Link Up” message, then the link
is down and the probable cause could be a disconnected cable, transceiver or
hub.
5.1.3 Link Integrity Test
The link integrity test feature is always enabled on SunFastEthernet cards. The
link integrity test feature is a requirement of the IEEE 10Base-T standard. The
purpose of the test feature is to enable a 10Base-T node to detect a link failure.
The standard requires that on a periodic basis, each station on the net transmit
link pulses whenever it is not transmitting valid packets. Sampling the link
pulses, the receiver will assume that the network connection (link) is intact and
assumes a link pass state.
# be: Using External Transceiver
10 Mbits/sec Link Up
# be: Using External Transceiver
100 Mbits/sec Link Up