Cisco Systems GRP-B manual MEM-GRP/LC-64=2

Implementing Additional Configuration and Maintenance Tasks

Note

Note

Each GRP DIMM socket has one plastic lever on one end, which you use to remove the DIMM from its socket. (See Figure 16.)

Before proceeding, ensure that you have the proper tools and ESD-prevention equipment available. To upgrade DRAM, you will install DIMMs in one or two banks (U39 and U42). Table 14 lists the various available configurations of DRAM DIMMs, the number of DIMMs for each configuration, and the DRAM banks they occupy. Note which banks you should use, given the combinations of available DIMM sizes and the maximum DRAM you require.

Depending on your router’s configuration and the protocols and features your system is running, you might require more than 128 MB of DRAM. Upgrade your system DRAM based on your current configuration, this potential requirement, and the information in Table 14.

Table 14 GRP Memory Options

Total Route Memory
Ordered1	Cisco Product Number	DIMM Modules	DRAM DIMM Sockets
64 MB	MEM-GRP/LC-64=2	1 64-MB DIMM	U39 or U42
128 MB	MEM-GRP/LC-128=	1 128-MB DIMM	U39
256 MB	MEM-GRP/LC-256=3	2 128-MB DIMMs	U39 and U42
256 MB	MEM-GRP-256=4	1 256-MB DIMM	U39
512 MB	MEM-GRP-512=5	2 256-MB DIMMs	U39 and U42

1.Do not mix memory sizes. If installing 2 DIMMs, both DIMMs must be the same size.

2.For GRPs equipped with 64 MB, this option adds a second 64-MB DIMM for a total of 128 MB.

3.This product is no longer available. Replace it with Cisco Product Number MEM-GRP-256.

4.Only compatible with Product Number GRP-B=.

5.GRP route memory configurations of 512-MB are only compatible with Product Number GRP-B=. In addition, Cisco IOS Release 12.0(19)S or 12.0(19)ST or later and ROMMON Release 11.2 (181) or later are also required.

Note If your system includes redundant GRPs, both GRPs 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 Internet Router publication for more information on redundancy.

Caution To prevent system and memory problems when installing DRAM, make sure that the card’s DRAM DIMMS are +3.3VDC, 60-ns, EDO devices. Do not attempt to install other DRAM devices in the GRPs DIMM sockets.

Upgrading GRP Memory

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