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Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01
Chapter 6 Installing and Upgrading Internal Modules and FRUs
Removing and Replacing the USB Flash Token Memory Stick
Removing the PVDM4 from the Cisco Fourth-Generation T1/E1 Voice and WAN
Network Interface Module in the Cisco ISR 4451-X
Step 1 Shut down the electrical power to the slot in the router by either turning off the electrical power to the
router or by issuing the online insertion and removal (OIR) stop command. Leave the power cable
plugged in to channel ESD voltages to ground. For more information on OIR, see the “OIR Procedures”
section on page 7-2.
Step 2 Loosen the two captive screws on the network interface module
Step 3 Remove the network interface module with the PVDM4. (See Figure 6-22.)
Step 4 Loosen the three screws and standoffs on the PVDM4.
Step 5 Lift the PVDM4 up from the network interface module.
Step 6 Place the PVDM4 in an anti-static bag.
Step 7 If you are not immediately replacing the network module, install the blank cover over the empty network
module slot.
Step 8 Slide the network interface module back in the router and tighten the captive screws.
Removing and Replacing the USB Flash Token Memory Stick
The Cisco ISR 4451-Xs contain ports for a 1 GB flash token memory stick to store configurations or
Cisco IOS XE consolidated packages.
Note Only Cisco USB Flash memory modules are supported by Cisco routers.
Caution Do not remove a USB Flash memory module when issuing some file access command or a read/write
operation to the Flash memory module when it is processing. The router might reload or the USB Flash
memory module can be damaged. You can check to see if the USB activity LED on the
Cisco ISR 4451-X front panel is flashing, prior to the removal of the USB device
To remove and then replace a USBflash token memory stick from a Cisco ISR 4451-X, follow these
steps:
Step 1 Pull the memory stick from the USB port.
Step 2 To replace a Cisco USB Flash memory stick, simply insert the module into the USB port 0 or 1 port as
shown in Figure 6-23. The Flash memory module can be inserted in only one way, and can be inserted
or removed regardless of whether the router is powered up or not.
Note Figure 6-23 is only a sample of how the memory stick is inserted into the port and does not
display the actual Cisco ISR 4451-X faceplate.
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