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APPENDIX C - PDU DAISY-CHAIN FUNCTION
What will happen if an Ethernet cable is disconnected in
the PDU daisy-chain?
For example, if four PDUs are connected and the cable
connecting Guest 1 and 2 is disconnected, then Guest 2 and
3 will no longer be detected by the Host PDU. An event
showing that Guest 2 and 3 are removed will be recorded
in the Host PDU. Meanwhile, Guest 2 and 3 will create a
new daisy-chain where Guest 2 becomes a Host and Guest
3 becomes Guest 1 to the new Host.
In the above example, if the disconnected Ethernet cable
is re-connected, will the role of the PDUs stay the same?
Yes, when the disconnected cable between Guest 1 and 2
is re-connected, Guest 2 and 3 will revert to their previous
roles.
What happens if one PDU in the daisy-chain is
powered o ?
For example, if four PDUs are connected and Guest 1 is
powered o, an event showing that Guest 1, 2 and 3 are
removed will be recorded in the Host PDU. Guest 2 and 3
will not create another daisy-chain.
Does the Host PDU record the logs of the Guest PDUs
and itself ?
Yes, the Host PDU records the logs from all Guest PDUs
daisy-chained to it.
Host
Guest #1
Guest #2
Host
Guest #3
Guest #1
Ethernet
Will the Logs of the Guest PDUs recorded in the Host
PDU be cleared if the Guest PDUs are removed from the
Host PDU?
No, the Logs of the Guest PDUs will remain even after the
Guest PDUs are removed.
Does the Host PDU record the Status Records of the
Guest PDUs and itself ?
Yes, the Host PDU records the Status Records for all the
PDUs in the daisy-chain.
Will the Status Records of the Guest PDUs logged in the
Host PDU be cleared if the Guest PDUs are disconnected
from the Host PDU?
Yes, once the Guest PDUs are removed, the Status Records
logged in the Host PDU will be cleared. As long as the Host
PDU does not connect to other PDUs, the Status Records
of the disconnected PDU can be displayed when it is re-
connected to the Host PDU. If the Host PDU connects to
dierent PDUs, the Status Records of the removed PDU will
be entirely cleared.
Are the Guest PDUs able to connect to the network when
they are daisy-chained?
Yes, even when the PDUs are daisy-chained, the Guest
PDUs are able to connect to the network directly. Note
that a Guest PDU will require having its own Ethernet cable
connected to the network.
What will happen if a 5th PDU is added to a daisy-chain?
The maximum number of PDUs that can be connected in
one daisy-chain is 4. The daisy-chain functionality will not
work until the fifth PDU is removed.
What is the maximum recommended length of the
Ethernet cable to daisy-chain the PDUs?
50 ft (15 m)
TROUBLESHOOTING
Problem Possible Cause Solution
The PDUs are connected but the
daisy-chain function is not working.
1. The firmware version does not
support daisy-chain.
2. The PDUs have dierent firmware
versions.
Reset Breaker, check the plug to insure
its connected correctly. If the problem
remains, contact technical support.
I cannot set the EnergyWise
configuration on a Guest PDU.
Only the Host PDU supports
EnergyWise.
N/A
I cannot set the WoL for Guest PDUs. Only the Host PDU supports WoL. N/A
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