50
Upgrading GRP Memory
78-4339-09
Implementing Additional Configuration and Maintenance Tasks
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.
Note
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
.
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.
Table 14
GRP Memory Options
Total Route Memory
Ordered
1
1.
Do not mix memory sizes. If installing 2 DIMMs, both DIMMs must be the same size.
Cisco Product Number
DIMM Modules
DRAM DIMM Sockets
64 MB
MEM-GRP/LC-64=
2
2.
For GRPs equipped with 64 MB, this option adds a second 64-MB DIMM for a total of 128 MB.
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
3.
This product is no longer available. Replace it with Cisco Product Number MEM-GRP-256.
2 128-MB DIMMs
U39 and U42
256 MB
MEM-GRP-256=
4
4.
Only compatible with Product Number GRP-B=.
1 256-MB DIMM
U39
512 MB
MEM-GRP-512=
5
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.
2 256-MB DIMMs
U39 and U42
