3Com SuperStack II manual Enabling Dial-On-Demand, Using Manual Dial, Place the call using

90CHAPTER 7: ADVANCED CONFIGURATION OF PORTS AND PATHS

Enabling Dial-On-Demand

Dial-on-demand automatically dials the destination bridge/router when network traffic is present and hangs up when the network is idle. Dial-on-demand also provides failover support. If the primary line goes down, the bridge/router will failover to another available dial-up line, either from a dial pool or from another path assigned to the same port. The bridge/router may use multiple lines to acheive the normal bandwidth.

To use failover or to use multiple lines to acheive normal bandwidth, you must have multiple phone numbers in the dial number list. The first number is for the primary line. If the primary line fails or provides less than normal bandwidth, the port dials the second number in the list, then the following numbers in succession if required. The dial number list allows you to use a different path for each phone number by specifying the baud rate and device type.

For example, the first number in my dial number list uses a 64 Kbps BRI line. The second number uses a 28.8 modem. If the ISDN line fails, the port will dial the 28.8 modem next.

See “Working with Dial Number Lists” on page 113 for more information about dial number lists.

To enable dial-on-demand, follow these steps:

1Enable dial-on-demand for a port or virtual port using:

SETDefault !<port> -PORT DialInitState = DialOnDemand

2Set the amount of time before the dial-up line is disconnected if it is not in use:

SETDefault !<port> -PORT DialIdleTime = <seconds> (0-3600)

Using Manual Dial

Manual dial is enabled by default. To place a call manually, follow these steps:

1If you have previously enabled dial-on-demand, enable manual dial using:

SETDefault !<port> -PORT DialInitState = ManualDial

2Place the call using:

DIal !<port> [-PORT] [“<dial-string>”]