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Implementing Additional Configuration and Maintenance Tasks
Each GRP DIMM socket has one plastic lever on one end, which you use to remove the DIMM from
Note
its socket. (See
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).
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
Note
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
Total Route Memory
Ordered
64 MB
128 MB
256 MB
256 MB
512 MB
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.
If your system includes redundant GRPs, both GRPs should have the same memory size. Redundancy
Note
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.
To prevent system and memory problems when installing DRAM, make sure that the card's DRAM
Caution
DIMMS are +3.3VDC, 60-ns, EDO devices. Do not attempt to install other DRAM devices in the
GRPs DIMM sockets.
Upgrading GRP Memory
50
Figure
16.)
GRP Memory Options
1
Cisco Product Number
MEM-GRP/LC-64=
MEM-GRP/LC-128=
MEM-GRP/LC-256=
MEM-GRP-256=
MEM-GRP-512=
Table
DIMM Modules
2
1 64-MB DIMM
1 128-MB DIMM
3
2 128-MB DIMMs
4
1 256-MB DIMM
5
2 256-MB DIMMs
Table 14
lists the various
14.
DRAM DIMM Sockets
U39 or U42
U39
U39 and U42
U39
U39 and U42
78-4339-09
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