User Manual

PPP Multilink PPP
7-5
Note: Ensure that other port parameters (such as speed, parity, and flow control) are
properly configured for the connection.
2 Create a site for the outgoing multilink PPP connection.
Figure 7-5: Creating the Calling Site
Note: All other desired site parameters should be set up, and a static route should be
defined for the site, before the site is used for connections.
3 Configure the ports associated with the multilink site.
A Associate the site with two or more ports, giving each port a priority. Higher priority ports will
be used first.
Figure 7-6: Configuring Port Priority
B Estimate the bandwidth of each port associated with the site.
The estimate should be based on the fastest data transfer that the attached modem can support,
adjusted for expected compression.
The following example assumes a 28.8 kbps modem attached to port 2 with about a 2:1
compression rate (28800 x 2 = 57600 bps = 5760 bytes per second, rounded to 5800 bytes per
second).
Figure 7-7: Estimating Port Bandwidth
See Estimate Each Port’s Bandwidth on page 5-6 for in-depth instructions on calculating
bandwidth amounts.
C Specify a telephone number for each port.
When the site is brought up, the SCS will attempt a connection by dialing the telephone number
associated with the highest priority port (in this case, 555-1001).
Figure 7-8: Configuring Port Telephone Numbers
4 Configure the site bandwidth parameters.
Note: The SCS will only modify bandwidth if it initiated the connection.
Local>> DEFINE SITE irvine
Local>> DEFINE SITE irvine PORT 1 PRIORITY 1
Local>> DEFINE SITE irvine PORT 2 PRIORITY 2
Local>> DEFINE SITE irvine PORT 3 PRIORITY 3
Local>> DEFINE SITE irvine PORT 4 PRIORITY 4
Local>> DEFINE SITE irvine PORT 2 BANDWIDTH 5800
Local>> DEFINE SITE irvine PORT 1 TELEPHONE [phone]
Local>> DEFINE SITE irvine PORT 2 TELEPHONE [phone]
Local>> DEFINE SITE irvine PORT 3 TELEPHONE [phone]
Local>> DEFINE SITE irvine PORT 4 TELEPHONE [phone]