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Chapter 4: Installation
4-6 SEH100TX User’s Guide
4.4.1 Stacking SEH Hubs with an SEHI
Follow the procedures in this section if you are using an SEHI to manage
an SEH stack:
1. Power up the SEHI by plugging the power cord into the back panel of
the SEHI and plugging the other end into a grounded receptacle.
2. Verify that the PWR LED is on, indicating that the SEHI is receiving
power. After the SEHI runs a self test and completes the boot process
successfully, the CPU LED blinks green indicating normal operation.
If the LED remains red, the processor is faulty; contact Cabletron
Systems Technical Support. Do not proceed with the following steps
until the CPU LED is a steady blinking green.
3. Power up the SEH above the SEHI in the stack by plugging the power
cord into the back panel of the SEH and plugging the other end into a
grounded receptacle.
4. Verify that the PWR LED is on, indicating that the SEH is receiving
power.
NOTE
The SEH and the SEHI have universal power supplies that
allow connection to power sources from 100 Vac to 125 Vac
@ 4.0 A or 200 Vac to 250 Vac @ 2.0 A, 50/60 Hz.
NOTE
Locate the SEHI at the bottom of the stack.
For management purposes, stacked hubs are always
numbered from 1 to 5 starting at the bottom.
!
CAUTION
Do NOT power up or interconnect any other hubs in the stack
until the SEHI has successfully completed the boot process.
Also, do NOT connect the interconnect cable between the SEH
and the SEHI before powering up the SEH. Otherwise, damage
to the SEH may result.