Juniper Networks ERX Hardware 8 - Manual (Page 109)

Maintaining ERX Routers
Four main steps are involved in upgrading memory on SRP modules:
1. Display how much memory is currently installed on the SRP module.
2. Remove the SRP module and the SODIMMs.
3. Add the new SODIMMs to the SRP module.
4. Reinstall the SRP module and verify the upgrade.
See the following sections for information on each step.
WARNING: Do not insert any metal object, such as a screwdriver, or place your
hand into an open slot or the backplane when the router is on. Remove jewelry
(including rings, necklaces, and watches) before working on equipment that is
connected to power lines. These actions prevent electric shock and serious burns.
CAUTION: When handling modules, use an antistatic wrist strap connected to the
router’s ESD grounding jack, and hold modules by their edges. Do not touch the
components, pins, leads, or solder connections. These actions help to protect
modules from damage by electrostatic discharge.
Displaying the Memory Installed
Before you install the new memory, issue the show hardware command
to see how much memory is installed. Each ERX-7xx and ERX-14xx
model SRP module usually has at least 256 MB of memory. You need one
upgrade kit for each SRP module in the system.
Depending on the upgrade you are performing, the kit contains a
specific number of SODIMMs.
Removing SODIMMs
After removing the SRP module from the router, you might have to remove
lower-memory SODIMMs to upgrade to a higher-capacity SRP module. The
SODIMM sockets are close to the NVS card and have a cream-colored ceramic
connector at one edge. Some or all of the sockets might already contain SODIMMs.
1. Push down on the back edge of a SODIMM to release it from the socket.
(See Figure 38.)
2. Gently pull the SODIMM up and out to disconnect it from the connectors and
remove it from the socket.
Upgrading Memory on SRP Modules 91