Reference Guide

Power over Ethernet and Power over Ethernet Plus | 801
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/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 36-6.
You can augment the default prioritization using the command
[no] power inline priority {critical | high |
low}, where critical is the highest priority, and low is the lowest. FTOS ignores any LLDP-MED priority on
this port if you configure a priority with this command. If you do not configure a port priority with this
command, FTOS honors any LLDP-MED priority.
In general, priority is assigned in this order:
1.
power inline [static | auto] setting: power inline static ports have a higher priority than power inline auto
ports
2.
power inline priority {critical | high | low} setting or LLDP-MED TLV, if power inline priority is not
configured
3. slot ID
4. port ID
Note: For S-Series, where Table 36-6 refers to “line cards with the lowest slot number”, substitute
“S-Series stack members with the lowest unit ID”.)
Table 36-6. PoE/Poe+ Ports Priorities
Configuration Port Number Priority
Ports configured with power inline static Ports with the lowest port numbers in line cards with the lowest
slot number
1
Ports with the lowest port numbers 2
Ports configured with power inline auto Ports with the lowest port numbers in line cards with the lowest
slot number
3
Ports with the lowest port numbers 4