Supported Platforms
Configuring the Power-On Sequence for DPCs on MX Series Routers with the Enhanced AC PEM
MX Series routers running Junos OS Release 10.0 and later support an enhanced AC Power Entry Module (PEM) to provide the necessary power infrastructure to support up to twelve higher-capacity DPCs with higher port density and slot capacity. To support the cooling requirements for the enhanced AC PEMs, the routers support enhanced fan trays and fans. The Junos OS enables you to configure the power-on sequence for the DPCs on an MX Series router chassis containing the new AC PEM. This enables you to redistribute the available power to the DPCs based on your requirements and the calculated power consumption of the DPCs. To configure the power-on sequence, include the fru-poweron-sequence statement at the [edit chassis] hierarchy level:
Issue the show chassis power command to view power limits and usage details for the DPCs. Issue the show chassis power sequence command to view details on the power-on sequence for the DPCs. For more information about these commands, see the Junos OS System Basics and Services Command Reference .
If the power-on sequence is not configured by including the fru-poweron-sequence statement, the Junos OS uses the ascending order of the slot numbers of the DPCs as the sequence to power-on the DPCs.
