Cisco 12000 Series

7
Cisco 12000 Series Router Memory Replacement Instructions
78-4338-16
GRP, PRP, and Line Card Memory Overview
Table 2 lists the available route memory configurations and associated product numbers for the
Cisco 12000 Series Router PRP.
Note If your system includes redundant PRPs, both PRPs should have the same memory size. Redundancy is
not supported when using a GRP and a PRP in the same chassis. Cisco strongly recommends that you
avoid configuring your router using mixed route processor cards. Refer to the Route Processor
Redundancy Plus for the Cisco 12000 Series Router publication for more redundancy information.
Line Card Memory
There are two types of user-configurable line card memory on most line cards:
• Route or processor memory
• Packet memory
Line card memory configurations and memory socket locations differ, depending on the type of line card.
In general, all line cards share a common set of memory configuration options for route memory, but
support packet memory differently. For clarity in describing how to remove and install memory in this
publication, line cards fall into the following groups, based on certain physical characteristics:
• Engine 0 and Engine 1 line cards (See Figure 3.)
• Engine 2 line cards (See Figure 4.)
• Internet Service Engine (ISE), formerly known as Engine 3 line cards (See Figure 5.)
• Engine 4 and Engine 4+ line cards (See Figure 6.)
Note The procedures for replacing memory on both the Engine 4 and the Engine 4+ line cards is
identical.
Table 2 Route Memory Configurations Available for Cisco 12000 Series Router PRP
Total Route Memory
1
1. Do not mix memory sizes. If installing 2 DIMMs, both DIMMs must be the same size.
Cisco Product Number DIMM Modules
SDRAM DIMM
Sockets
2
2. Default SDRAM configuration is 512 MB. Bank 1 (U15) must be populated first. You can use one or both banks to configure
SDRAM combinations of 512 MB, 1 GB, or 2 GB. 1.5 GB configurations are not supported.
512 MB
3
3. One 512-MB DIMM is the default shipping configuration.
— 1 512-MB DIMM U15
1 GB MEM-PRP-512=
4
4. Upgrades PRP to 1 GB by adding a second 512-MB DIMM.
2 512-MB DIMMs U15 and U18
1 GB MEM-PRP-1G= 1 1-GB DIMM U15
1.5 GB
5
5. This memory size is not supported.
———
2 GB 2MEM-PRP-1G= 2 1-GB DIMMs U15 and U18