HP Enterprise File Services WAN Accelerator manual Autodiscovery, and CDP on

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an Address Resolution Protocol (ARP) request for the address, resolves it, and begins redirecting traffic to the next hop (that is, the HP EFS WAN Accelerator).

2.After PBR has verified the next hop, it continues to send to the next hop as long as it obtains answers from the ARP request for the next hop IP address. If the ARP request fails to obtain an answer, it then rechecks the CDP table. If there is no entry in the CDP table, it no longer uses the route map to send traffic. This verification provides a failover mechanism.

NOTE: Using PBR with CDP will not work on a Cisco 6500 router and switch combination that is setup in hybrid mode. You must use a native setup for this to work. A hybrid setup fails because all the routing is done on the Multilayer Switch Feature Card (MSFC). This card is treated as an independent system in a hybrid setup. Therefore, when you run the show cdp neighbors command on the MSFC, it displays the Supervisor card as its only neighbor. It does not see any of the devices that are connected to the switch ports. Therefore, it assumes none of those devices are reachable, and it does not redirect any traffic for route maps that use set ip next-hopverify-availability.

In more recent versions of the Cisco IOS software, there is a feature called PBR with Multiple Tracking Options. In addition to the old method of using CDP information, it allows methods such as HTTP and ping to be used to determine whether the PBR next hop is available. Using CDP allows you to run with older IOS 12.x versions.

NOTE: CDP is required for failover deployments on Cisco 6000, 6500, and 7600 platforms because Multiple Tracking Options is not available on these platforms.

For an example configuration, see “Symmetric Deployments with PBR,

Autodiscovery, and CDP” on page 60.

Connecting the HP EFS WAN Accelerator to

Your Network in PBR Deployments

There are two Ethernet cables attached to the HP EFS WAN Accelerator in PBR deployments:

‹A Straight through cable to the Primary interface. You use this connection to manage the HP EFS WAN Accelerator, reaching it through HTTPS or SSH.

‹A Straight through cable to the WAN interface. You assign an IP address to the In-Path interface; this is the IP address that you redirect traffic to (that is, the target of the router PBR rule).

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6 - POLICY-BASED ROUTING DEPLOYMENTS

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Contents HP StorageWorks Enterprise File Services WAN Accelerator 407118-001Legal and notice information Contents Chapter Policy-Based Routing Deployments Wccp DeploymentsSerial Cluster and Cascade Deployments 107 Proxy File Service DeploymentsRadius and TACACS+ Authentication Glossary 113 Index 117Introduction About This GuideOrganization of This Guide Document Conventions BoldfaceHardware and Software Dependencies Ethernet Network CompatibilityAntivirus Compatibility Additional Resources Related Reading Contacting HP HP Storage Web SiteIntroduction Designing an HP EFS WAN Accelerator Deployment Introduction to the HP EFS WAN AcceleratorTransaction Acceleration Virtual Window ExpansionDesign and Deployment Overview Transaction PredictionDesigning AN HP EFS WAN Accelerator Deployment Bypass Mode Definition of TermsFailover Mode Designing AN HP EFS WAN Accelerator Designing AN HP EFS WAN Accelerator Deployment In-Path Deployments ‹ In-Path,Server-Side, One to One Deployment onIntroduction to Physical In-Path Deployments In-Path, Failover Support DeploymentBasic Steps Client-Side Setup Advanced Networking Failover Settings In-Path, Two Routing Points Deployment Basic Steps Server-SideIn-Path, Server-Side Deployment Basic Steps Client-Side Basic Steps Server-SideIn-Path, Server-Side, One to One Deployment In-Path, Server-Side DeploymentFollowing figure illustrates the server-side of the network Setup Advanced Networking Failover Settings Virtual In-Path Network Deployments Introduction to Virtual In-Path DeploymentsIn-Path, Load Balanced, Layer-4 Switch In-Path, Load-Balanced, Layer-4 Switch Deployment Setup Optimization Service General Settings Out-of-Path Network Deployments Introduction to Out-of-Path DeploymentsOut-of-Path, Failover Deployment Physical Out-of-Path DeploymentOut-of-Path, Server-Side, Failover Support Deployment Setup Optimization Service In-Path Rules Out-of-Path, Static Cluster Deployment Static Cluster DeploymentSetup Optimization Service In-Path Rules, Fixed Target Server-Side Hybrid In-Path and Out-of-Path DeploymentBasic Steps Client-SideSetup Optimization Service In-Path Rules Basic Steps Server-Side OUT-OF-PATH Network Deployments Configuring Connection Forwarding Introduction to Connection ForwardingNeighbors Connection Forwarding Connection Forwarding in an Asymmetric NetworkConfiguring Connection Forwarding One-to-One Failover DeploymentConfiguring Connection Forwarding Using Management Console‹ Click Update Settings Configuring Connection Forwarding Using the CLI ForwardingPolicy-Based Routing Deployments ‹ Symmetric Deployments with PBR, Autodiscovery, and CDP onIntroduction to PBR Overview of CDPHow PBR works on a Cisco 6500 Platform Version 12.217d SXB1 Wccp PBRAutodiscovery, and CDP on Configuring PBR Using Asymmetric HP EFS WAN Accelerator Deployments With PBRTo configure the client- side HP EFS WAN Accelerator To configure the clientSide router Configuring PBR Using Management Console Setup Optimization Service General Settings Setup Optimization Service In-Path Rules Basic Steps Client-Side Basic Steps Server-Side PBR Between VLANs PBR Between VLANsEFS WAN Accelerator To configure the HPTo configure the Cisco RouterSet of commands EFS WAN AcceleratorsPOLICY-BASED Routing Deployments POLICY-BASED Routing Deployments Symmetric Deployments with PBR Autodiscovery, and CDP POLICY-BASED Routing Deployments Troubleshooting ‹ Troubleshooting on Wccp DeploymentsBasic Wccp Configuration Introduction to WccpFailover Support on Wccp CLI Commands ‹ To configure a service groupService group Basic Wccp Configuration ConnectingAccelerator Configuring Client-Side HP To configureWccp router Configuring Wccp Using the Management Console To add the Wccp service group toAccelerator Enable Wccp on your router Navigate to the Setup Advanced Networking Wccp Groups Setup Service, Wccp Groups To define in-path rules to reach the server- side appliance Basic Steps Server-Side Dual Wccp Deployment Wccp 3640 routerIp cef Wccp 6209 router No ip http serverTo set the password Additional Wccp FeaturesTo configure the server-side HP EFS WAN Accelerator SecurityMulticast TCP Port RedirectionLoad Balancing To configure specific traffic redirection on the routerTo change the hashing scheme and assign a weight Failover SupportTroubleshooting Proxy File Service Deployments Introduction to PFSProxy File Service Description Term PFS TermsPFS Operating Modes How Does PFS Work? When to Use PFSWhen to use Global Mode Configuring PFS Using the Management Console To join a domain forSetup Proxy File Service PFS Configuration Required Setup Proxy File Service Shares Mode Description To synchronize Initialize a shareTo map a share To modify share InformationTo view share status DetailsRadius and TACACS+ Authentication Introduction to AuthenticationConfiguring a Radius Server with FreeRADIUS To add acceptance Requests onRadius server Configuring a TACACS+ Server with Free TACACS+ To downloadConfiguring AuthenticationSetup Authentication General Settings TACACS+ 104 105 106 Serial Cluster and Cascade Deployments Serial Cluster DeploymentSerial Cluster To configure HP EFS WAN Accelerator1 Basic Serial Cluster DeploymentTo configure HP EFS WAN Accelerator2WAN Accelerator3 Cascade Deployment Cascade DeploymentFixed-Target Rules Glossary 114 115 116 Index PBR118
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