Cisco Systems C7200 manual Disabling VSA Optional, Configuring a Transform Set

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Chapter 4 Configuring the VSA

Configuration Tasks

Step 5

Step 6

Command	Purpose

Router(config-isakmp)# hash {sha md5}	(Optional) Specifies the hash algorithm within an IKE policy.
	• sha—Specifies SHA-1 (HMAC variant) as the hash
	algorithm.
	• md5—Specifies MD5 (HMAC variant) as the hash
	algorithm.
	Note If this command is not enabled, the default value (sha)
	will be used.

Router(config-isakmp)# group {1 2 5}	(Optional) Specifies the Diffie-Hellman (DH) group identifier
	within an IKE policy.
	1—Specifies the 768-bit DH group.
	2—Specifies the 1024-bit DH group.
	5—Specifies the 1536-bit DH group.
	Note If this command is not enabled, the default value (768-bit)
	will be used.

For detailed information on creating IKE policies, refer to the “Configuring Internet Key Exchange Security Protocol” chapter in the Security Configuration Guide publication.

Disabling VSA (Optional)

The VSA is enabled by default.

To disable the VSA, use the following commands, starting in global configuration mode:

	Command	Purpose

Step 7	no crypto engine [slot accelerator] 0	Disables VSA.
	Note The VSA can only be inserted in slot 0.

Step 8	crypto engine [slot accelerator] 0	VSA will be enabled after the next
		system reboot.

This completes the procedure for disabling and preparing to enable VSA after the next system reboot.

Configuring a Transform Set

See the Advanced Encryption Standard (AES) feature module for more information on configuring a transform set.

This section includes the following topics:

•Defining a Transform Set

•IPSec Protocols: AH and ESP

C7200 VSA (VPN Services Adapter) Installation and Configuration Guide

4-4	OL-9129-02

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Contents Corporate Headquarters Text Part Number OL-9129-02Page N T E N T S Preventing Electrostatic Discharge Damage 2 Creating Dynamic Crypto Maps 4 OL-9129-02 Preface AudienceChapter Title Description ObjectivesOrganization Cisco.com Related DocumentationObtaining Documentation Product Documentation DVD Ordering Documentation Documentation FeedbackCisco Product Security Overview Reporting Security Problems in Cisco Products Product Alerts and Field NoticesObtaining Technical Assistance Cisco Technical Support & Documentation WebsiteObtaining Additional Publications and Information Submitting a Service RequestDefinitions of Service Request Severity Xiv Overview Data Encryption OverviewVSA Overview Screws Handle Status LED light VSA Module Front ViewFeature Description/Benefit FeaturesThis section describes the VSA features, as listed in Table Hardware RequiredStandards Supported Standards, MIBs, and RFCsPerformance MIBsDisabling the VSA during Operation Command PurposeEnabling/Disabling the VSA Enabling/Disabling SchemeLEDs Condition System is ConfiguredCommand Description of VSA Behavior Slot Locations ConnectorsSee -2for the VSA connectors Cisco 7204VXR RouterPort adapter VSA in I/O controller slot Port adapter lever Cisco 7204VXR Router Front ViewCisco 7206VXR Router Cisco 7206VXR Front ViewRequired Tools and Equipment Hardware and Software RequirementsRestrictions Software RequirementsHardware Requirements PlatformOnline Insertion and Removal OIR Safety GuidelinesSafety Warnings Electrical Equipment Guidelines Preventing Electrostatic Discharge DamagePreparing for Installation OL-9129-02 Handling the VSA VSA circuit board is sensitive to ESD damageVSA Removal and Installation This section describes how to remove and install the VSARemoving and Installing the VSA VSA Removal and Installation OL-9129-02 Configuration Tasks OverviewUsing the Exec Command Interpreter Configuring an IKE PolicyOptional Specifies the authentication method within an IKE Key Management Protocol Isakmp policy configurationConfig-isakmp mode Signatures as the authentication methodConfiguring a Transform Set Disabling VSA OptionalDefining a Transform Set Transform type Description Selecting Appropriate Transforms Crypto Transform Configuration ModeIPSec Protocols AH and ESP Setting Global Lifetimes for IPSec Security Associations Configuring IPSecEnsuring That Access Lists Are Compatible with IPSec Changing Existing TransformsStep Command Purpose Creating Crypto Access Lists Creating Crypto Map EntriesESP authenticator algorithm Only one transform set can be specified when IKE isAuthenticator keys if the transform set includes an Exits crypto-map configuration mode and return toCreating Dynamic Crypto Maps If this is configured, the data flow identity proposed Optional Accesses list number or name of anExtended access list. This access list determines For this crypto access listMonitoring and Maintaining IPSec Applying Crypto Map Sets to InterfacesVerifying IKE and IPSec Configurations Router# show crypto isakmp policyVerifying the Configuration Currentpeer 172.21.114.67 PERMIT, flags=originisacl Configuring IPSec Configuration Example Configuration ExamplesConfiguring IKE Policies Example This section provides the following configuration examplesCrypto map is applied to an interface Basic IPSec Configuration IllustrationRouter a Configuration Specify the parameters to be used during an IKE negotiation Router B ConfigurationTransform set defines how the traffic will be protected Troubleshooting Tips Router# show diagTunnel I/F Using Deny Policies in Access Lists Monitoring and Maintaining the VSAMonitor and Maintenance Commands Configuration Guidelines and RestrictionsD E Set session-key command Set transform-set command Sa command, clear crypto Entries, creatingSet pfs command Features Handling Monitoring and maintaining 4 Overview Handling VPN Acceleration Module see VAM 1IN-4