Cisco 3600 Series Configuration Note

Memory upgrade
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Doc. No.
78-3636-01
Cisco 3600 Series Memory Upgrade
Configuration Note
Product Numbers:
MEM3600-4FS=, MEM3600-8FS=, MEM3620-4D=, MEM3620-8D=, MEM3620-16D=,
MEM3640-4D=, MEM3640-8D=, MEM3640-16D=, MEM3640-32D=
CPAMEM3600-4FS=, CPAMEM3600-8FS=, CPAMEM3620-4D=, CPAMEM3620-8D=,
CPAMEM3620-16D=, CPAMEM3640-4D=, CPAMEM3640-8D=, CPAMEM3640-16D=,
CPAMEM3640-32D=
This document describes how to upgrade dynamic random-access memory (DRAM) single in-line
memory modules (SIMMs), Flash-memory SIMMs, and read-only memory (ROM) in a Cisco 3620
or Cisco 3640 router.
Note
routers.
Use this document in conjunction with your router installation and configuration guide and the
Regulatory Compliance and Safety Information document for your router. If you have questions or
need help, refer to the section "Obtaining Service and Support" later in this document.
This document contains the following sections:
Safety Recommendations, page 3
Tools and Equipment Required, page 4
Removing the Cover, page 4
Upgrading DRAM, page 7
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All rights reserved.
In this document, the term "Cisco 3600 series" refers to the Cisco 3620 and Cisco 3640
1

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  Related Manuals for Cisco 3600 Series

  Summary of Contents for Cisco 3600 Series

  • Page 1 This document describes how to upgrade dynamic random-access memory (DRAM) single in-line memory modules (SIMMs), Flash-memory SIMMs, and read-only memory (ROM) in a Cisco 3620 or Cisco 3640 router. In this document, the term “Cisco 3600 series” refers to the Cisco 3620 and Cisco 3640 Note routers.
  • Page 2 “Safety Recommendations.” When a procedure refers to the left side or right side of the chassis, it means as viewed from Note the front. 2 Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 3: Safety Recommendations

    — Working on or near power supplies — Installing or removing a router chassis or network processor module — Performing a hardware upgrade • Do not work alone if potentially hazardous conditions exist. Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 4: Preventing Electrostatic Discharge Damage

    ESD-preventive wrist strap Removing the Cover To gain access to memory in a Cisco 3600 series router, you must first remove the chassis cover. Before working on a chassis or working near power supplies, unplug the power cord on Warning AC units;...
  • Page 5 Step 4 top of the cover near the front edge. (Figure 2 shows these screws for the Cisco 3620 cover, and Figure 3 shows the screws for the Cisco 3640 cover.) Set the screws aside in a safe place. Lift the front edge of the cover about 1 inch (2.5 cm) above the chassis, as shown in Step 5 Figure 1.
  • Page 6 Step 6 Pull the cover toward you until the metal tabs on the rear edge separate from the chassis bottom. (See Figure 2 for the Cisco 3620 and Figure 3 for the Cisco 3640.) Figure 2 Removing the Cisco 3620 Cover...
  • Page 7 This section describes how to upgrade DRAM on the system card. You might need to upgrade DRAM for the following reasons: • You have upgraded to a new Cisco Internetwork Operating System (Cisco IOS) feature set or release. • You are using very large routing tables or many protocols (for example, when the router is set up as part of both a large external network and your internal network).
  • Page 8 Cisco 3620 DRAM SIMM Locations DRAM SIMMs Only certain combinations of DRAM SIMMs are permitted. These combinations are shown in Table 1. (Memory configurations that are too small to run the Cisco IOS software are not shown.) Table 1 Cisco 3620 32-Bit-Wide DRAM Configurations...
  • Page 9 CPU. For further information, refer to the Cisco IOS configuration guides and command references. You can configure DRAM in the Cisco 3640 router to be either 32 bits wide or 64 bits wide. The 64-bit mode can use both single-bank and dual-bank SIMMs. To use 64-bit mode, you must install DRAM SIMMs in pairs of the same size.
  • Page 10 Only certain combinations of DRAM SIMMs are permitted. These combinations are shown in Table 2 for 64-bit configurations, and in Table 3 for 32-bit configurations. (Memory configurations that are too small to run the Cisco IOS software are not shown.) Follow these rules to use 64-bit mode DRAM configuration: •...
  • Page 11 (SIMM 1) (SIMM 2) (SIMM 3) Memory (MB) (MB) (MB) (MB) (MB) – – – – – – – – – – – – – – – – – – – – – Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 12 Figure 6 shows the polarization notch and alignment holes on a SIMM card. Cisco 3600 series DRAM SIMM cards are installed with the connector edge down, the polarization notch near the front of the chassis, and the component side facing the right side of the chassis.
  • Page 13: Installing Dram Simms

    fit through the alignment holes, and the connector springs click into place. Ensure that each SIMM is straight and that the alignment holes (as shown in Figure 7) Step 4 line up with the plastic guides on the socket. Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 14: Upgrading Flash Memory

    SIMMs are manufactured with a polarization notch to ensure proper orientation and alignment holes to ensure proper positioning, similar to those shown in Figure 9. Cisco 3600 series Flash SIMM cards are installed with the connector edge down, the polarization notch near the front of the chassis, and the component side facing the right side of the chassis.
  • Page 15 Connect the equipment end of the wrist strap to the metal backplate of the chassis, avoiding contact with connectors. Find the Flash-memory SIMM sockets on the router motherboard. (See Figure 10 and Step 2 Figure 11.) Figure 10 Cisco 3620 Flash Memory Locations Flash memory SIMMs Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 16 To lift the Flash-memory SIMM out of its socket, pull the locking spring clips on both Step 3 sides outward and tilt the SIMM toward the left side of the chassis, free of the clips. (See Figure 12.) 16 Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 17 SIMM polarization notch Installing Flash-Memory SIMMs Follow this procedure to install Flash-memory SIMMs: Find the Flash-memory SIMM sockets on the Cisco 3600 series motherboard. Step 1 (See Figure 10 and Figure 11.) Handle SIMMs by the edges only. SIMMs are ESD-sensitive components and can be Caution damaged by mishandling.
  • Page 18: Upgrading The Rom

    If you are finished replacing SIMMs, continue with the section “Replacing the Cover” later in this document. Upgrading the ROM To upgrade the Cisco 3600 series firmware to a new ROM monitor, you must replace the existing ROM. In addition to the tools described in the section “Tools and Equipment Required” earlier in this document, you also need: •...
  • Page 19 The notch on the ROM must match the notch on the socket on the card. Installing the ROM Caution backward will damage it. When you are finished replacing the ROM, continue with the section “Replacing the Cover” later in this document. Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 20 Replace the cover, as described in the next section, “Replacing the Cover.” Step 5 Try booting the router again. Step 6 If the problem persists, refer to the section “Obtaining Service and Support” later in this document. 20 Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 21: Replacing The Cover

    Reinstall the chassis on a rack, wall, desktop, or table. Step 6 Reinstall network interface cables, as described in the following section, “Replacing Step 7 Connections to the Router.” Figure 16 Replacing the Cisco 3620 Cover Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 22 Check the OK LED on the right side of the front panel to verify that it goes ON after a Step 4 few seconds delay when booting. If you have problems, see the next section, “Obtaining Service and Support.” 22 Cisco 3600 Series Memory Upgrade Configuration Note...
  • Page 23: Obtaining Service And Support

    For service and support for a product purchased from a reseller, contact the reseller. Resellers offer a wide variety of Cisco service and support programs, which are described in the section “Service and Support” in the information packet that shipped with your chassis.
  • Page 24 SwitchWare, SynchroniCD, The Cell, The FastPacket Company, TokenSwitch, TrafficDirector, Virtual EtherSwitch, VirtualStream, VlanDirector, Web Clusters, WNIC, Workgroup Director, Workgroup Stack, and XCI are trademarks; Access by Cisco, Bringing the Power of Internetworking to Everyone, Enter the Net with MultiNet, and The Network Works.