Vertiv Intelligent Rack PDU
Page 39
NOTE
When changing sensors the old sensor must be deleted before the new
sensor will be discovered.
7.
Proprietary Connectivity :
RJ12 port for future expansion.
Rapid Spanning Tree Protocol (RSTP)
Vertiv Upgradable monitored devices, built with the IMD-02E include two Ethernet ports which work to-
gether as an internal Ethernet bridge. One of these ports can be used to connect the IMD to an existing
network, or both ports can be used at the same time to connect one IMD to another in a daisy-chain con-
figuration.
When both network interfaces are connected, the IMD implements a network bridging protocol called the
Rapid Spanning Tree Protocol (RSTP). RSTP is an IEEE standard that is implemented by all managed
bridges. Using RSTP, bridges in the network exchange information to find redundant paths, or loops.
When a loop is detected, the bridges in the network work together to temporarily disable the redundant
paths. This allows the network to avoid broadcast storms caused by the loops. In addition, RSTP regu-
larly checks for changes in the network topology. When a connection is lost, RSTP allows the bridges to
quickly switch to a redundant path.
NOTE
RSTP protocol imposes a limit of 40 links between bridges, including IMDs.
Visible Light Communication (VLC)
The VLC feature on Vertiv Upgradeable PDUs allows the user to unobtrusively upload product information
into a database management system via the embedded LED display. This product feature provides new
opportunities to monitor and enable larger amounts of PDU power data to be obtai
ned via the unit’s dis-
play, and all without physically connecting to the PDU.