AT-GS950/48PS Switch Web Interface User’s Guide
Port Prioritization As long as the total power requirements of the PDs is less than the total available power of the switch, it can supply power to all of the PDs. However, when the PD power requirements exceed the total available power, the switch denies power to some ports based on a process called port prioritization.
The ports on the PoE switch are assigned to one of three priority levels.
These levels and descriptions are listed in Table 7.
| Table 7. PoE Port Priorities | |
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Priority | Description | |
Level | ||
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Critical | This is the highest priority level. Ports set to the Critical | |
| level are guaranteed to receive power before any of the | |
| ports assigned to the other priority levels. | |
|
| |
High | Ports set to the High level receive power only when all | |
| the ports assigned to the Critical level are already | |
| receiving power. | |
|
| |
Low | This is the lowest priority level. Ports set to the Low level | |
| receive power only when all the ports assigned to the | |
| Critical and High levels are already receiving power. This | |
| level is the default setting. | |
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Without enough power to support all the ports set to the same priority level at one time, the switch provides power to the ports based on the port number, in ascending order. For example, when all of the ports in the switch are set to the low priority level and the power requirements are exceeded on the switch, port 1 has the highest priority level, port 2 has the next highest priority level and so forth.
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