Sun Microsystems 5500, Reference Manual

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4-20 Sun Enterprise 6500/5500/4500 Systems Reference Manual • April 1998
For the system to communicate with a network, the
tpe-link-test?
settings for
the onboard Ethernet ports must be compatible with the setting at the network hub.
The
tpe-link-test?
variable is set separately for the onboard Ethernet port on
each I/O+ board. The variable is also set for any SBus Ethernet cards in the system.
If you have problems verifying connection between Sun equipment and your hub,
verify that your hub also has the link test function enabled. Also, refer to the manual
provided with your hub.
1. Place the SBus card on an antistatic mat.
2. For DSBE/S and FSBE/S cards: remove the two outer retaining screws (
FIGURE 4-18
),
but do NOT remove the middle screw or the springfinger.
Use a #0 Phillips screwdriver and a 3/16 nut driver or socket wrench.
3. For DSBE/S and FSBE/S cards, configure jumper J0302 for Link Integrity Test
functionality. See
FIGURE 4-18
(DSBE/S) or
FIGURE 4-19
(FSBE/S).
a. Put the shunt over both pins to disable the Link Integrity Test (
FIGURE 4-20
“Disabled”)
b. Put the shunt in one pin to enable the Link Integrity Test (
FIGURE 4-20
“Enabled”).
Caution –
If you choose to disable the test, it must be disabled both at the hub and
at the SBus card. In the event of “loss of carrier” or “not responding” errors, check
the status of the link enable on both the SBus card and the hub.