Lucent Technologies P550 - Manual (Page 87)

Configuring the Cajun P550 Switch (Layer 2 & Layer 3)
Cajun P550/P220 Switch Operation Guide 3 -41
Configuring Redundant Hardware
In both Layer 2 and Layer 3 models, the Cajun P550 switch provides a redundant
backplane to ensure that if a controller or an element fails, the switch will continue to
route data properly. The redundant components are available as separate options.
When the redundant controller and element are installed, the backplane consists of the
following parts:
❒ One main controller
❒ One redundant controller
❒ Six switch elements
❒ One redundant element
Figure 3-7. Layout of Redundant Backplane
The Cajun P550 switch is equipped with diagnostics to monitor the status of switch
controllers and elements. When an element fails, diagnostics run automatically and test
the hardware. In the Web Agent, information about a failed controller or element
displays in the Switch Fabric Status dialog box.
If the primary controller fails, the redundant controller takes over switch operation until
you replace the primary controller. If an element fails, the redundant element takes over
the function of the failed element until you replace the element.
The following sections explain how to:
❒ Install Redundant Hardware
❒ Replace the Primary Controller
❒ Replace an Element
Redundant
Controller
Primary
Controller
Redundant
Element
Elements
6 - 4
Elements
3 - 1