Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 742
Monitor the Power Budget, Manage Power Priorities, Enabling PoE on a Port, Table 39-5
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www.dell.com | support.dell.com Monitor the Power Budget The power budget is the amount of power available from the installed PSUs minus the power required to operate the chassis. Use the show power inline (the first example in Enabling PoE on a Port) and show power detail (the second example in Enabling PoE on a Port) commands to help you determine if power is available for additional PoE ports (1478.40 Watts are supplied per C-Series PSU; max of 790W on S-Series with load-sharing external DC PSU). Enabling PoE on more ports than is supported by the power budget produces one of these results: • If the newly PoE-enabled port has a lower priority, then the command is accepted, but power is not allocated to the port. In this case, the following message is displayed. Message 1 Insufficient Power to Enable PoE %Warning: Insufficient power to enable. POE oper-status set to OFF for port • If the newly PoE-enabled port has a higher priority, then the CLI is accepted, and power is terminated on the lowest priority port in the chassis. If another power supply is added to the system at a later time, both ports receive power. • If all of the lower priority ports combined cannot meet the power requirements of the newly enabled port, then the CLI is accepted, but power on the lower priority ports is not terminated, and no power is supplied to the port. The second result in this scenario is true even if a powered device is not connected to the port. Power can be allocated to a port, thus subtracting it from the power budget and making it unavailable to other ports, but that power does not have to be consumed. Manage Power Priorities PoE-enabled ports have power access priorities based first on their configuration and then by line card and port number. The default prioritization is presented in Table 39-5, "PoE Ports Priorities," in Power over Ethernet. Note: For S-Series, where Table 39-5, "PoE Ports Priorities," in Power over Ethernet refers to "line cards with the lowest slot number", substitute "S-Series stack members with the lowest unit ID".) Table 39-5. PoE Ports Priorities Configuration Ports configured with power inline static Port Number Priority Ports with the lowest port numbers in line cards with the lowest 1 slot number Ports with the lowest port numbers 2 742 | Power over Ethernet
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