Question about Cisco Systems 24-Port SF 300-24P 10/100 PoE Managed Switch (SRW224G4PK9NA)

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I am trying to add an additional PoE device, put it will not power up. How can I tell the switch to power up a specific port, or put the switch into automatic mode?

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Are you within the power budget?

Power feeding of Ethernet is limited for fixed 10BASE-T/100BASE-TX ports. The solution can provide maximum output power per PoE port up to 15.4W on 12 ports or 7.5W on 24 ports simultaneously. The Switch provides independent overload and short-circuit protection for each port, LED indicators for power status per PoE port, and supports IEEE802.3af MIB for Power over Ethernet functionality.
For each attached 802.3af-compliant device, the Switch automatically senses the load and dynamically supplies the required power. The Switch delivers power to a device using the two data wire pairs in the twisted-pair cable. Each port can provide up to 15.4W of power at the standard -48 VDC voltage.

Source: http://www.cisco.com/en/US/products/ps9967/products_qanda_item09186a0080a36afb.shtml

Posted on Mar 20, 2011

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Will the PoE Function of S2700/S3700/S5700 PoE Switches Be Affected When a 110 V Power Source Is Used?


When using Huawei power supply units, Huawei fixed switches supports 110 V AC input power. The power consumption of most powered devices (PDs) is 4 W to 5 W; therefore, 250 W and 500 W power supply units can provide sufficient PoE power for PDs.
NOTE:
All fixed PoE switches except the S2700-9TP-PWR-EI, S2750-20TP-PWR-EI-AC, S2750-28TP-PWR-EI-AC, S2751-28TP-PWR-EI-AC, S5700-10P-PWR-LI-AC, S5700-28P-PWR-LI-AC, S5700-28TP-PWR-LI-AC, S5700S-28P-PWR-LI-AC, S5701-28TP-PWR-LI-AC, S5700-52P-PWR-LI-AC, S5700-28X-PWR-LI-AC, and S5700-52X-PWR-LI-AC support double PoE power supply units.

Jan 10, 2017 | Computers & Internet

1 Answer

Do the Cisco Catalyst 3850 Series PoE switches support power classification?


Catalyst 3850 Series Switches support full IEEE 802.3at Power over Ethernet Plus (PoE+).
The switch classifies the detected IEEE device within a power consumption class. Based on the available power in the power budget, the switch determines if a port can be powered (class 0,1,2,3,4). You should be aware of maximum POE power you exact model can proide - check the datasheet!

Jan 13, 2015 | Cisco Computers & Internet

1 Answer

How do I extend the range of the 12vdc


Longer than say a 6-ft extension cord ?

you can try what is called Power-Over-Ethernet or POE.
here is some reading material



Power over Ethernet

Basically it allows for the transmission of power via an Ethernet cable to Networking devices that are POE-capable, (like many Wireless Access Points,) If your device does not specifically have a Port labeled POE, then you do not have that as an option.

Oct 11, 2014 | Computers & Internet

1 Answer

The power devices that Cisco Catalyst 2960 Series Support?


The Cisco Catalyst 2960-48PST-L can support 48 PoE ports with total PoE power output capacity at 370W. Taking advantage of Cisco Catalyst Intelligent Power Management, the Cisco Catalyst 2960-48PST-L configuration can deliver the necessary power to support 24 ports at 15.4W, 48 ports at 7.7W, or any combination in between.

The Cisco Catalyst 2960-24PC-L can support 24 simultaneous full-powered PoE devices at 15.4W for maximum powered-device support.

The Cisco Catalyst 2960-24LT-L can support eight PoE devices at 15.4W
Cisco Catalyst 2960 Switches for the details

Aug 15, 2014 | Computers & Internet

1 Answer

My EAP 350 not supporting POE for more than 40 mtrs. i am using netgear prosafe POE switch. Thanks in advance


Dear Rajkuma,
As per poe 802.3 af specification only 50 Mtrs distance is supported.
If you want to cover more distance then you must purchase 1 Port PoE Repeater which Allows up to an additional 330 ft
Hope this may solve your problem.

Apr 17, 2013 | EnGenius EAP350 - wireless access point

1 Answer

PoE


If your switch does not support PoE, you'll have to use a power injector which should be enclosed with your router package.
connect the switch to the injector using one of the two ports in the injector (should be labeled with a small drawing or writing to differentiate which port of the two connects to the switch and which connects to the router), power the injector up, connect the other port to the router.

good luck
Majdi

Dec 27, 2011 | NetGear ProSafe WAG102

2 Answers

I need more ethernet ports on my router so I can connect another computer but I do not want to buy a new router. Can I put an expansion piece into my motorola 3347-02-1022 router? One that will add one or...


1. you can add a multi-port switch to one of the port on the router. this will give you additional ports. Beware of too many it will take up bandwidth depending on you broadband speed.

Sep 09, 2011 | Computers & Internet

1 Answer

I have a HP ProCurve MSM 410 AP. It will accept clients and then in 20 minutes it starts dropping connections..and will not let them back on with a restart. I have poured over the specs for both AP and...


I'm having a very similar issue with 5 MSM410's (at 2 differant locations), purchased at the same time, from the same vendor.

With 2, when connected using PoE Injector, the AP gets hot (at the Data/Poe port), and only permits 3 devices to connect before the devices start losing the ability comminicate beyond the AP (i.e. I can logon to the AP with the Web Interface (WI), but cannot ping the DHCP server or even the Gateway device on the other side of th AP from the devices, but can ping both directions without issue from the AP's WI). HOWEVER; when connected using the PoE from a Cisco ASA-5505 (port 0/6 or 0/7) the devices work flawlessly.
- For this site, I replaced the Power Injector first, then replaced the AP. No change
- When connected to the PoE on the Cisco the unit does not run "Hot".

With 3 others at another location, they only allow 3 devices to connect and will disconnect any devices previously connected. These 3 are supplied PoE from Dell PowerConnect Gigabit Switches (also used to supply power to the VoIP and PoE Security Camera's), and also run Hot at the Data/PoE ports. We have not tried power injectors at this site.

I've tried to find any indication of how to adjust the PoE and Data Port settings to resolve this, but cannot find anything, and this appears to be a unique issue, as noone I have contacted has ever experianced it.

- Mike

Mar 28, 2011 | HP ProCurve MSM410 (J9426A) Pre-802.11n...

1 Answer

50 port lan switch specification


It should like you would like to move away from a chassis switch with blades? You have a number of options, depending on whether you also require PoE or stackability, and specifically what optical connections you require. There are many, many options, depending on the specifics of your need. The Cisco Catalyst 3750G-48TS is one likely option, and is stackable to provide a redundantly linked "core" with a shared backplane. See Cisco's page for other options within this product line. http://www.cisco.com/en/US/products/hw/switches/ps5023/
If you require additional info, or help with the project, please feel free to contact me.

Jan 12, 2010 | Cisco Catalyst 4006 Chassis ( 4006)

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