Accepted Solutions
Tried reaching out to support but they wouldn't help because the devices aren't covered via a Cisco reseller...
PHOTO1 Port Management, Properties:
- Class Limit (Power mode): I do not have the screenshot for the Class Limit Config…
Note: I just selected “Port Limit” without saving the settings….
The original configuration was set to Class Limit - When set to this setting, the with will determine what class the End Device is - I.e. the WiFi APs… The WiFi APs are class 4, which means they require 25W max for operation… this number is rounded up so the allotted power will be 30W.
Nominal Power is the reserved amount of Wattage used for PoE - this switch has a max of 120W reserved for PoE usage.
Consumed Power is the amount of wattage the currently being used - Then Class Limit setting had 100W as the consumed power for 5 APs…
Available Power is the PoE wattage left over for PoE usage. At the Class Limit, the Available Power was 20W. This was not enough wattage to power more APs (for Class 4), thus, the reason only 5 APs were being powered.
PHOTO2 PoE Settings: I do not have the screenshot for the original PoE Settings…
The original configuration for Admin Power Allocation was 30W; the Max Power Allocation was also 30W, but the Negotiated Power was 19000 - this confirms the 20W left over as the Available Power in the first photo being that 5 APs were being powered and left 20W available.
I know the remaining 20W should have powered the next AP, however, there is additional power being utilized (not shown) due to the loss of power while being sent over the data cable… This is also affected by the allocation of 30W to each port - because the available power was just 20W, the port denied power to the other ports because there was not enough power to allocate 30W to the remaining ports.
I changed the Admin Power Allocation to 15W, giving a Max Power Allocation of 15W per port for 8 ports (120 / 8 = 15). As you can see, the Negotiated Power is 19W, however, the port power will only go as far as 15W, which means if the APs need more power; they may not achieve their highest level of operation.
PHOTO3 Port Management / Properties:
I then changed the Power Mode to “Port Limit”… this allows for the PoE settings to take place… Class Limit overrides the PoE settings and will default back to allotting 30W per port ignoring the port limits that were set..
Once the changes took place, the allocated power is about 90W with Available Power at 30W - again, with the max reserve PoE set at 15W, it will allot for 8 APs (15w x 8 = 120W)…
Tried reaching out to support but they wouldn't help because the devices aren't covered via a Cisco reseller...
PHOTO1 Port Management, Properties:
- Class Limit (Power mode): I do not have the screenshot for the Class Limit Config…
Note: I just selected “Port Limit” without saving the settings….
The original configuration was set to Class Limit - When set to this setting, the with will determine what class the End Device is - I.e. the WiFi APs… The WiFi APs are class 4, which means they require 25W max for operation… this number is rounded up so the allotted power will be 30W.
Nominal Power is the reserved amount of Wattage used for PoE - this switch has a max of 120W reserved for PoE usage.
Consumed Power is the amount of wattage the currently being used - Then Class Limit setting had 100W as the consumed power for 5 APs…
Available Power is the PoE wattage left over for PoE usage. At the Class Limit, the Available Power was 20W. This was not enough wattage to power more APs (for Class 4), thus, the reason only 5 APs were being powered.
PHOTO2 PoE Settings: I do not have the screenshot for the original PoE Settings…
The original configuration for Admin Power Allocation was 30W; the Max Power Allocation was also 30W, but the Negotiated Power was 19000 - this confirms the 20W left over as the Available Power in the first photo being that 5 APs were being powered and left 20W available.
I know the remaining 20W should have powered the next AP, however, there is additional power being utilized (not shown) due to the loss of power while being sent over the data cable… This is also affected by the allocation of 30W to each port - because the available power was just 20W, the port denied power to the other ports because there was not enough power to allocate 30W to the remaining ports.
I changed the Admin Power Allocation to 15W, giving a Max Power Allocation of 15W per port for 8 ports (120 / 8 = 15). As you can see, the Negotiated Power is 19W, however, the port power will only go as far as 15W, which means if the APs need more power; they may not achieve their highest level of operation.
PHOTO3 Port Management / Properties:
I then changed the Power Mode to “Port Limit”… this allows for the PoE settings to take place… Class Limit overrides the PoE settings and will default back to allotting 30W per port ignoring the port limits that were set..
Once the changes took place, the allocated power is about 90W with Available Power at 30W - again, with the max reserve PoE set at 15W, it will allot for 8 APs (15w x 8 = 120W)…
