| 1.2 |  | Routers |
| 1.2.4 |  | Management port connections |

| The console port and the auxiliary (AUX) port are management ports. These asynchronous serial ports are not designed as networking ports. One of these two ports is required for the initial configuration of the router. The console port is recommended for this initial configuration. Not all routers have an auxiliary port. When the router is first put into service, there are no networking parameters configured. Therefore the router cannot communicate with any network. To prepare for initial startup and configuration, attach an RS-232 ASCII terminal, or a computer emulating an ASCII terminal, to the system console port. Then configuration commands can be entered to set up the router. Once this initial configuration is entered into the router through the console or auxiliary port, the router can then be connected to the network for troubleshooting or monitoring. The router can also be configured from a remote location by dialing to a modem connected to the console or auxiliary port on the router. The console port is also preferred over the auxiliary port for troubleshooting. This is because it displays router startup, debugging, and error messages by default. The console port can also be used when the networking services have not been started or have failed. Therefore, the console port can be used for disaster and password recovery procedures.
| Web Links Connecting the DC Power Supply http://www.cisco.com/en/US/products/ hw/routers/ps259/products_installation_guide_ chapter09186a008007dff8.html#xtocid14