User guide

3-82 Packet Over SONET Module Installation and User Guide
Configuring the PoS Module
APS Benefits
In this section, we examine the benefits provided by APS. A typical redundant switch
configuration is illustrated in Figure 3-16. In this scheme, both BlackDiamond switches
have two SONET interfaces that are connected to different ADMs. In this configuration,
no switch, PoS interface, SONET line, or ADM represents a single point-of-failure.
Compare this with the APS configuration depicted in Figure 3-17.
Figure 3-16: Typical redundant switch configuration without APS
PoS_015
BlackDiamond 1
1234AB5678
1234AB5678
BlackDiamond 2
ADM
2
ADM
1
192.168.10.1
192.168.20.1
192.168.10.3
192.168.20.3