Configuring an APC AP7900

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Template:Howto tutorial

[[image:APC_AP7900_Front-Right.jpg|thumb|right|400px|APC AP7900 8-Outlet 1U 120vAC PDU. Photo by APC.

Purpose of This Tutorial =

The APC-brand AP7900 switched PDU is an excellent backup fence device. All Anvil! systems we build use a pair of them.

This mini-tutorial covers how to configure them with an IP address.

That is all you need to do for them to start working!

Warning: If you need to put the PDUs onto a public network, be sure to enable SNMP authentication!

We run them on our VLAN isolated subnet which how no access to the normal internal network, nor does it have access to the Internet. Thanks to this, we can safely run them without authentication over SNMP queries.

Serial Access

[[image:Antaira_UTS-1110A_Top.jpg|thumb|right|400px|Antaira UTS-1110A single-port USB to RS-232] serial adapter. Photo by Antaira.

By default, the APC AP7900 does not have an IP address assigned.

The easiest way to configure an IP address is to log into the PDU over a serial port. Most servers still come with a built-in 9-pin serial port, but most desktops and laptops do not. If you don't have one, many vendors sell USB to serial adapters. The one we've used quite successfully is the Antaira UTS-1110A, but almost any adapter you can find at your local computer store will work.

We're going to use a program called screen to talk to the PDU over the serial port.

To do this, you need to know what device the PDU's serial cable is plugged into. Some common ones:

Type Device path
Serial port 1 /dev/ttyS0
Serial port 2 /dev/ttyS1
USB-Connected port 1 /dev/ttyUSB0


 

Any questions, feedback, advice, complaints or meanderings are welcome.
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