7
IP MULTIPLEXING HDLC
CONFIGURATIONS
7.1Connecting a Black Box Router to a Router/CSU
via HDLC
The following diagram details a single T1 connection between a Black Box and a remote router/CSU combination. Secondary IP addressing is used for IP multiplexing.
Figure 15 IP Multiplexing Application
10.1.1.2/24
Router/
T1 CSU
10.1.1.3/24 | Telco |
| |
T1 | CT3 | ||
|
LR1104A
192.5.75.1/24
192.5.75.0/24
129.1.1.2/24
| Primary: 129.1.1.1/24 |
| Secondary: 10.1.1.1/24 |
| Router |
SITE 1 | SITE 2 |
The two sites communicate over a single T1 channel. The Site 2 WAN bundle, named “ToSite1”, consists of a single T1 channel coming in via a CT3 circuit. Site 1 router's default route is directed to the Site 2 router: 0.0.0.0/0 10.1.1.1
The Site 2 router is configured with: primary ethernet address: 129.1.1.1/24, secondary ethernet addr on the WAN
subnet: 10.1.1.1/24, and route to the Site 1 router: 192.5.75.0/24 10.1.1.3.