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Note In this document, references to the Cisco 4000 series mean all routers in the series. References to the Cisco 4000 router or to another individual router mean only that router. Note When a procedure refers to the left side or right side of the chassis, component tray, or motherboard, unless otherwise specified, it means as viewed from the front. Use this document in conjunction with your router installation guide and the Cisco 4000 Series Public Network Certification document.
Safety Recommendations Warning Before working on a system that has an ON/OFF switch, turn OFF the power and unplug the power cord. The following warning applies to routers with a DC power supply: Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Safety Recommendations Safety with Electricity Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Follow these guidelines when working on equipment powered by electricity: • Locate the room’s emergency power-OFF switch. Then, if an electrical accident occurs, you can quickly shut the power OFF.
Memory Systems Memory Systems Cisco 4000 series routers contain the following memory systems: • Main memory consists of dynamic random-access memory (DRAM) single in-line memory modules (SIMMs). It is reserved for the CPU to execute Cisco Internetwork Operating System (Cisco IOS) software and to hold the running configuration and routing tables. • Shared memory also consists of DRAM SIMMs, and buffers data transmitted or received by the router’s network interfaces.
Memory Systems Figure 1 Cisco 4000 Series EPROM-Based and Flash-Based Memory Systems Cisco 4000 and Cisco 4000-M EPROM-based Boot helper (xboot) Flash-memory based Cisco IOS ROM monitor Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M ROM monitor Flash-memory based Boot helper (xboot) Cisco IOS H3537 EPROM-based The following sections describe memory systems in each router in the Cisco 4000 series.
Tools Required Cisco 4500-M The Cisco 4500-M router contains the following memory systems: • Two SIMM sockets for main memory. Both must be filled, and they must contain equal memory sizes (4 and 4 MB, 8 and 8 MB, or 16 and 16 MB). • • One SIMM socket for shared memory (4 or 16 MB). Two SIMM sockets for system Flash memory, plus one for boot helper Flash memory. One or both system Flash-memory sockets may be filled.
Removing the Component Tray Removing the Component Tray To gain access to the router’s memory, you must first remove the component tray from the chassis. Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. Warning Do not touch the power supply when the power cord is connected.
Removing the Component Tray Figure 3 Chassis without a Safety Latch Chassis shell AUX CONSOLE INPUT 100-240VAC Rear of chassis Support the component tray with your hand 50/60HZ 3.0-1.5 AMPS H2899 Chassis release screw Handle Follow these steps to remove the component tray from a chassis: Step 1 Turn OFF the power. Step 2 Attach your ESD-preventive wrist strap. Step 3 Remove all network and power cables.
Removing the Component Tray Step 6 To remove the component tray, pull on the handle at the upper right corner of the rear panel. If your chassis has a safety latch (see Figure 2), slide the component tray out of the chassis shell just until the safety latch catches. Support the component tray with one hand, push down on the safety latch tab, and pull the component tray out the rest of the way.
Removing the Component Tray Cisco 4000-M Component Tray Module mounting screw Module handle LED J1 Module mounting screw Module handle Front of the chassis LEDs Module handle FW1 FW2 128-pin connector (cutaway view) Module mounting screw H2404 Figure 5 Boot ROMs Upgrading Memory in Cisco 4000 Series Routers 11
Removing the Component Tray Figure 6 Cisco 4500, Cisco 4700, and Older Cisco 4500-M Component Tray Token Ring module Ethernet module Module mounting screws Module handle LED Front of chassis Module handle LEDs U61 U63 U64 J6 Module handle H2690 U68 Module cutaway view 128-pin module connector Dual serial module 12 Upgrading Memory in Cisco 4000 Series Routers Module mounting screw ROM monitor
The Cisco 4000 Flash EPROM Card Figure 7 Cisco 4700-M and Newer Cisco 4500-M Component Tray Token Ring module Ethernet module Module mounting screws Module handle LED J1 Front of the chassis Module handle LEDs U61 U63 U64 J6 Module handle H6669 U78 Module cutaway view 128-pin module connector Dual serial module Module mounting screw ROM monitor The Cisco 4000 Flash EPROM Card In the Cisco 4000 router only, Flash memory resides on a separate daughter card.
The Cisco 4000 Flash EPROM Card Removing the Flash EPROM Card Follow these steps to remove the Flash EPROM card from a Cisco 4000 router in order to gain access to main memory, or to replace the original Flash EPROM card: Step 1 Using a Number 1 Phillips screwdriver, remove the two mounting screws from the top of the card and set them aside. See Figure 4 for the location of these screws.
The Cisco 4000 Flash EPROM Card Caution Correct placement of the Flash EPROMs and PAL is crucial. If improperly positioned, the new components could be damaged when you power ON the router. Installing Flash-Memory EPROMs To install new Flash EPROMs in the eight open sockets (U141 to U148) on the Flash EPROM card (see Figure 9), align the notch in each EPROM with the notch in an EPROM socket. Insert the Flash EPROM into the sockets, being careful not to bend any pins.
Removing Network Processor Modules Removing Network Processor Modules To gain access to shared memory in all routers, you must remove the center network processor module from the component tray. In the Cisco 4000 router, you must also remove the module on the right (as viewed from the front of the router). To access the ROM monitor in Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M routers, remove the module on the left.
Removing Network Processor Modules Figure 10 Removing Network Processor Modules Module handles Male module connector (cutaway view) Female module connector on the motherboard Safety latch H1048a Chassis wall Module mounting screw Figure 11 Network Processor Module Daughter Card Connections Daughter card Correct installation showing connectors firmly seated. H2168 Daughter card Incorrect installation showing connectors not firmly seated.
Memory Locations Memory Locations Figure 12, Figure 13, Figure 14, and Figure 15 show locations of memory components on Cisco 4000 series router motherboards.
Memory Locations Cisco 4000-M Memory Locations Shared-memory SIMM socket Main memory SIMM socket with proper SIMM orientation Motherboard Chassis Front U3 J1 U44 J7 J8 Pin 1 J4 J6 Flash memory SIMM sockets U114 U110 FW1 J7 FW2 Pin 1 J6 J8 H2403 Figure 13 Boot ROM jumpers (J7 and J8) Boot ROMs J6 write-enable jumper position Upgrading Memory in Cisco 4000 Series Routers 19
Memory Locations Figure 14 Cisco 4500, Cisco 4700, and Older Cisco 4500-M Memory Locations Main memory SIMM sockets with correct SIMM orientation Shared-memory SIMM and socket Motherboard Front of chassis System Flash memory 1 System Flash memory 0 RxBoot Flash memory J6 J1 H2449 NVRAM Jumped pins 1 and 2 U68 Jumper in place enables writing to Flash memory ROM monitor 20 Upgrading Memory in Cisco 4000 Series Routers
SIMM Orientation Figure 15 Cisco 4700-M and Newer Cisco 4500-M Memory Locations Motherboard Shared-memory SIMM and socket Main memory SIMM sockets with correct SIMM orientation J1 Jump pins 1 and 2 Front of chassis System Flash memory 1 System Flash memory 0 RxBoot Flash memory NVRAM H6665 J6 J5 U78 Jump pins 1 and 2 ROM monitor Jumper in place enables writing to Flash memory SIMM Orientation SIMMs are manufactured with a polarization notch to ensure proper orientation, and alignment holes tha
Upgrading Main Memory Upgrading Main Memory A main-memory upgrade entails removing the existing main-memory SIMMs and replacing them with the upgraded SIMMs. If you are upgrading a Cisco 4000 router, you must first remove the Flash EPROM card. See the section “Removing the Flash EPROM Card” earlier in this document.
Upgrading Main Memory Figure 18 Removing Main Memory SIMMs (All Other Routers) Top view Front of chassis 2. Push the top of the SIMM forward. H9408 1. Pull the locking spring clips outward. SIMM polarization notch Installing Main-Memory SIMMs Follow these steps to install main-memory SIMMs: Step 1 Find the main-memory SIMM sockets on the router’s motherboard, as shown in Figure 12, Figure 13, Figure 14, or Figure 15. All sockets should be empty.
Upgrading Main Memory Figure 19 Installing Main-Memory SIMMs (Cisco 4000) View from front of chassis 1. Insert the SIMM into the socket at an angle from vertical. 2. Push the top of the SIMM down and back. 3. The socket guide posts fit through the holes in the SIMM. H9410 4. The locking springs clip the back of the SIMM. Figure 20 Installing Main-Memory SIMMs (All Other Routers) View from front of chassis 1. Insert the SIMM into the socket at an angle from vertical. 2.
Upgrading Shared Memory Upgrading Shared Memory A shared-memory upgrade entails removing the existing shared-memory SIMMs and replacing them with the upgraded SIMMs. You must first remove the network processor modules from the component tray. See the section “Removing Network Processor Modules” earlier in this document.
Upgrading Flash Memory Figure 21 Installing Shared-Memory SIMMs Top view Push the SIMM down and back Polarization notch Side view, SIMM inserted Push the SIMM down and back H1052a The socket guide posts insert through the SIMM holes (on both sides) If you are finished upgrading memory, continue with the section “Replacing Network Processor Modules” later in this document. Upgrading Flash Memory Flash memory in the Cisco 4000 router resides on a separate daughter card.
Upgrading Flash Memory Removing Flash-Memory SIMMs To remove a Flash-memory SIMM, follow these steps: Step 1 Find the system Flash-memory sockets on the motherboard, as shown at the lower right of Figure 13, Figure 14 or Figure 15. These sockets hold the SIMMs vertically. Caution Handle SIMMs by the edges only. SIMMs are ESD-sensitive components and can be damaged by mishandling.
Upgrading the ROM Step 3 Begin with system Flash memory socket 0, as shown in Figure 13, Figure 14, or Figure 15. Insert the SIMM at an angle, tilted toward the right side of the router (as viewed from the front). Rock it into a vertical position (see Figure 23), using the minimum amount of force required. When the SIMM is properly seated, the socket guide posts fit through the alignment holes, and the connector springs click into place.
Installing the Flash EPROM Card (Cisco 4000 Router Only) Align the notch in the new ROM with the notch in the socket, ignoring the orientation of the label. Insert the ROM in its socket, being careful not to bend any pins. To straighten a bent pin, use needlenose pliers. Step 3 Caution The notch on the ROM must match the notch on the socket. Installing the ROM backward will damage it. For Cisco 4000 routers only, set jumpers J5 and J6 to designate the capacity of the Boot ROMs.
Replacing Network Processor Modules Step 5 Once the Flash EPROM card has been replaced, the boot ROMs have been replaced, and the boot ROM capacity jumpers have been set, replace the component tray in the chassis.
Cisco Documentation If you installed a new ROM incorrectly, the router may fail to boot. Following the procedures in this document, gently remove the old ROM with an IC extraction tool or a small flat-blade screwdriver, and set it aside. Use needlenose pliers to straighten any bent pins on the ROM. Then reinstall it carefully, reassemble the router, and try booting again. If you have questions or need help, refer to the sections “Cisco Documentation” and “Cisco Connection Online” later in this document.
Cisco Connection Online Cisco Connection Online Cisco Connection Online (CCO) is Cisco Systems’ primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services. Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco’s customers and business partners.
