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1400 series 802.11a bridge with Catalyst 3524 switch?

sronancisco
Level 1
Level 1

According to the documentation below, "You cannot provide redundant power to 1100 and 1200 series access points with both DC power to its power port and inline power from a patch panel or powered switch to the access point's Ethernet port." How about the 1400 series bridges? Can you use its power injector to provide power and also plug it into a Catalyst 3524 switch (WS-C3524-PWR-XL-EN)? Will it know not to draw power from the switch? Or should it be plugged into a hub and the hub plugged into the switch? Or what would be the recommended configuration? The 3524 switch already has 350 series access points and a 350 bridge plugged into it. What would be the risks, if any, of plugging the 1400 series bridge also into the switch while it is also drawing power from a power injector?

Thanks for any advice!

http://www.cisco.com/en/US/products/hw/wireless/ps458/prod_release_note09186a00801d0607.html

Use Only One Power Option

"You cannot provide redundant power to 1100 and 1200 series access points with both DC power to its power port and inline power from a patch panel or powered switch to the access point's Ethernet port. If you apply power to the access point from both sources, the switch or power patch panel might shut down the port to which the access point is connected. Figure 1 shows the power configuration that can shut down the port on the patch panel or powered switch.

"Figure 1 Improper Power Configuration Using Two Power Sources

"Operating 5-GHz Radio Requires Power Injector, Power Module, or Catalyst 3550-24 PWR Switch

"The 1200 series power injector and the 1200 series power module support operation of the 5-GHz radio in the access point. Currently, the Catalyst 3550-24 PWR switch supports power for both the 2.4-GHz radio and the 5-GHz radio. Other switches and power patch panels might not provide enough power for the 5-GHz radio.

"Access Point Requires 1200 Series Universal Power Supply and Power Injector

"The 350 series universal power supply and power injector are not compatible with the 1200 series access point. If you use a power injector or a power module to provide power to a 1200 series access point, you must use a 1200 series universal power supply. If you need to use a power injector to inject power into the access point's Ethernet port, you must use a 1200 series power injector."

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gamccall
Level 4
Level 4

The power injector is inline between the switch and the access point. If your power injector fails, you've lost connectivity to the switch anyway. And, powering a device from a switchport only works if they're directly cabled together; you can't have any other intermediate devices in the path.

In short: No. It's not a matter of being a bad idea, it's a matter of not being possible to even try.

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2 Replies 2

gamccall
Level 4
Level 4

The power injector is inline between the switch and the access point. If your power injector fails, you've lost connectivity to the switch anyway. And, powering a device from a switchport only works if they're directly cabled together; you can't have any other intermediate devices in the path.

In short: No. It's not a matter of being a bad idea, it's a matter of not being possible to even try.

Ah, got it. Thanks!

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