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3Com Router 6000 Family
Installation Manual
Chapter 6
Maintaining Hardware
3Com Corporation
6-4
6.4.2 Installing the RPU2
Step 1: Power off the switch or power switches if two PSUs are installed.
Step 2: Align the edges of the RPU2 with the guides in the RPU2 slot and push the card inside
the router. Pull the ejector levers at both side of the RPU2 inward until they form the smallest
degree with respect to the RPU2 panel.
Step 3: Fasten the captive screws on the RPU2.
Step 3: Power on the router and check that the RPU2 LED is blinking.
6.5 Replacing the SDRAM
This section describes how to replace an SDRAM (Synchronous Dynamic Random Access
Memory) module. SDRAM modules can be replaced on the RPU only. Memory on the RPU2
cannot be replaced. The following flowchart provides an overview of the SDRAM replacement
process.
End
Remove the RPU
Locate the SDRAM
on the RPU
Remove the SDRAM
Install the RPU
Prepare tools
Start
End
Remove the RPU
Locate the SDRAM
on the RPU
Remove the SDRAM
Install a new SDRAM
Replace the RPU
Prepare tools
Start
End
Remove the RPU
Locate the SDRAM
on the RPU
Remove the SDRAM
Install the RPU
Prepare tools
Start
End
Remove the RPU
Locate the SDRAM
on the RPU
Remove the SDRAM
Install a new SDRAM
Replace the RPU
Prepare tools
Start
Figure 6-4 SDRAM maintenance flow
SDRAMs are main board memory components that you can expand or upgrade as needed.
Generally, you need to do that in the following situations:
z More memory is required for the upgraded application image, maintaining a large
routing table, or processing tasks that consume large memory.
z The existing SDRAM is damaged.