Cisco Service Adapters

Document ID: 15068

Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Memory Upgrade Requirements
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Related Information

Introduction

This document recommends the use of 128 MB of system memory when you use Integrated Services Module (ISM) or Integrated Services Adapter (ISA) to increase router stability.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on these software and hardware versions:

• Cisco IOS^® Software Release 12.0 (5) XE5 or later

• Cisco 7100 Series Router

• Cisco 7200 Series Router

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Memory Upgrade Requirements

A router needs at least 128 MB of system memory when you use hardware-assisted encryption acceleration cards, such as ISM, in a Cisco 7100 Series Router or ISA in a Cisco 7200 Series Router. This configuration increases the stability of the router when the router establishes more than 100 Virtual Private Network (VPN) tunnels. This table specifies the system memory upgrade requirements for Cisco 7100 and 7200:

In a Multi-ISA configuration, for example, two ISAs in a Cisco 7200 Series Router or ISA and ISM in a Cisco 7140 Series Router, install 256 MB of system memory. This table specifies the system memory upgrade requirements for Cisco 7100 and 7200 with Multi-ISA.

All Cisco 7100 Series VPN bundles have 128 MB of system memory by default. Here is the list of bundles:

• CISCO7120-4T1/VPN—7120-4T1 VPN Bundle, ISM, 2xFE, AC PS, IPSEC DES

• C7120-4T1/VPN/K9—7120-4T1 VPN Bundle, ISM, 2xFE, AC PS, IPSEC 3DES

• CISCO7140-2FE/VPN—7140-2FE VPN Bundle, ISM, 2xFE, 2xAC PS, IPSEC DES

• C7140-2FE/VPN/K9—7140-2FE VPN Bundle, ISM, 2xFE, 2xAC PS, IPSEC 3DES

• CISCO7140-8T/VPN—7140-8T VPN Bundle, ISM, 2xFE, 2xAC PS, IPSEC DES

• C7140-8T/VPN/K9—7140-8T VPN Bundle, ISM, 2xFE, 2xAC PS, IPSEC 3DES

• CISCO7140-8T/VPN—7140-8T VPN Bundle, ISM, 2xFE, 2xAC PS, IPSEC DES

• C7140-8T/VPN/K9—7140-8T VPN Bundle, ISM, 2xFE, 2xAC PS, IPSEC 3DES

Multi-ISA Cisco 7100 Series bundles have 256 MB of system memory by default. Here is the list of bundles:

• C7140-2FE/2VPN/K8—7140-2FE VPN Bundle, ISM & ISA, 2xFE, 2xAC PS, IPSEC DES

• C7140-2FE/2VPN/K9—7140-2FE VPN Bundle, ISM & ISA, 2xFE, 2xAC PS, IPSEC 3DES

All Cisco 7100 series non-VPN bundles come with 64 MB of system memory.

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Related Information

• Cisco 7100 Series VPN Routers Support Page
• Cisco 7200 Series Routers Support Page
• Technical Support & Documentation - Cisco Systems