• Removing a Transceiver from a J-EX Series Switch on page 168Routing Engine (RE) Module in a J-EX8216 SwitchThe Routing Engine (RE) module performs system control, system management, FRUconfiguration, and FRU management functions in a J-EX8216 switch. An RE modulecontains a Routing Engine. See Figure 10 on page 26.A redundant J-EX8216 switch has two RE modules for Routing Engine and system controlredundancy. See “Understanding J-EX8216 Switch Component and FunctionalityRedundancy” on page 12.The RE modules install horizontally into the top front of the chassis in slots labeled RE0and RE1.Figure 10: RE Module in a J-EX8216 SwitchNOTE: We recommend that you install two RE modules for redundancy. Ifyou install only one RE module, we recommend that you install it in slot RE0.See “Slot Numbering for a J-EX8216 Switch” on page 14.When two RE modules are installed, one RE module functions as the master and theother acts as the backup. If the master RE module fails or is removed, the backup moduletakes over as the master RE module. When the RE modules are configured for gracefulswitchover, the backup RE module automatically synchronizes its configuration and statewith those of the master RE module. Any update to the master RE module is replicatedon the backup RE module. If the backup module assumes mastership, packet forwardingcontinues through the switch.We recommend, however, that you always take an RE module offline before removingit. If only one RE module is installed, we recommend that you disable the switch by haltingthe RE module (thus taking it offline) before removing the RE module. See “Taking theRE Module Offline in a J-EX8216 Switch” on page 161.The RE module provides these functions:26Dell PowerConnect J-Series J-EX8216 Ethernet Switch Hardware Guide
