Paradyne 3616, 3615 manual Dial Backup for Exceeded Load Thresholds Application

Application Configurations

Dial Backup for

Exceeded Load Thresholds Application

Use the application shown in Figure E-2 when traffic loading (acquiring additional bandwidth upon demand) for the router is needed. The router must use its Backup Load option.

Using this configuration, the router enables its secondary serial port (EIA-232) by raising DTR when the transmitted and received load on the primary serial port (V.35) is greater than the value assigned for traffic-load purposes. Raised DTR signals the DSU to establish a backup connection to increase available bandwidth. When the load is within threshold limits again, the router lowers DTR, deactivating the secondary serial port. This signals the DSU to drop the backup connection.

For example, a Cisco router can be configured as follows:

interface serial 0

backup load 60 5

In this example, if traffic on the primary serial port exceeds 60%, the secondary serial port is activated by the router raising DTR. It will not be deactivated (DTR lowered) until the combined load is less than 5% of the primary bandwidth.

For this application, the DSU is configured like the application in Figure E-1. Select the Synchronous Backup for either a control or tributary (SyBC or SyBT) configuration from the preset configurations provided by the Configuration (Confg) branch, depending upon which DSU you are configuring.

Figure E-2. Dial Backup for Exceeded Load Thresholds (SyBC and SyBT) Application

3615-A2-GB20-20 December 1996 E-3