Preinstallation Checklist for Cisco HX Data Platform

Preinstallation Checklist for Cisco HX Data Platform 2

HyperFlex Edge Deployments 2

Cisco HyperFlex Systems Documentation Roadmap 2

Checklist Instructions 2

Contact Information 3

HyperFlex Software Versions 4

Physical Requirements 5

Network Requirements 5

Port Requirements 6

HyperFlex External Connections 13

Deployment Information 14

Contacting Cisco TAC 18

Preinstallation Checklist for Cisco HX Data Platform

HyperFlex Edge DeploymentsCisco HyperFlex Edge brings the simplicity of hyperconvergence to remote and branch office (ROBO) and edge environments.

Starting with Cisco HX Data Platform Release 4.0, HyperFlex Edge deployments can be based on 2-Node, 3-Node, or 4-Node Edgeclusters. For the key requirements and supported topologies that must be understood and configured before starting a Cisco HyperFlexEdge deployment, refer the Preinstallation Checklist for Cisco HyperFlex Edge.

Cisco HyperFlex Systems Documentation RoadmapFor a complete list of all Cisco HyperFlex Systems documentation, see Cisco HyperFlex Systems Documentation Roadmap.

Checklist InstructionsThis is a preengagement checklist for Cisco HyperFlex Systems sales, services, and partners to send to customers. Cisco uses thisform to create a configuration file for the initial setup of your system enabling a timely and accurate installation.

Download a Local Copy of the Editable Form

1. Download the Cisco HX Data Platform Checklist Form.

2. Open the local file and fill in the form.

3. Save the form.

4. Return the form to your Cisco account team.

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Important You CANNOT fill in the checklist using the HTML page.

Contact Information

Customer Account Team and Contact Information

PhoneE-mailTitleName

•

•

•

•

•

•

•

•

•

•

Equipment Shipping Address

Company Name

Attention Name/Dept

Street Address #1

Street Address #2

City, State, and Zip

Data Center Floor and Room #

Office Address (if different than shipping address)

Company Name

Attention Name/Dept

Street Address #1

Street Address #2

City, State, and Zip

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HyperFlex Software VersionsThe HX components—Cisco HX Data Platform Installer, Cisco HX Data Platform, and Cisco UCS firmware—are installed ondifferent servers. Verify that each component on each server used with and within an HX Storage Cluster are compatible.

• HyperFlex does not support UCS Manager and UCS Server Firmware versions 4.0(4a), 4.0(4b), and 4.0(4c).

Do not upgrade to these versions of firmware.

Do not upgrade to these versions of UCS Manager.

Important

• Verify that the preconfigured HX servers have the same version of Cisco UCS server firmware installed. If the Cisco UCS FabricInterconnects (FI) firmware versions are different, see the Cisco HyperFlex Systems Upgrade Guide for VMware ESXi, Release4.0 for steps to align the firmware versions.

• M4: For NEW hybrid or All Flash (Cisco HyperFlex HX240c M4 or HX220c M4) deployments, verify that Cisco UCSManager 3.1(3k), 3.2(3i), or 4.0(2b) or higher is installed. For more information, see Recommended Cisco HyperFlex HXData Platform Software Releases.

• M5: For NEWhybrid or All Flash (CiscoHyperFlexHX240cM5 or HX220cM5) deployments, verify that the recommendedUCS firmware version is installed.

For SED-based HyperFlex systems, ensure that the A (Infrastructure), B (Blade server) and C (Rack server) bundlesare at Cisco UCSManager version 4.0(2b) or later for all SEDM4/M5 systems. For more details, see CSCvh04307.For SED-based HyperFlex systems, also ensure that all clusters are at HyperFlex Release 3.5(2b) or later. For moreinformation, see Field Notice (70234) and CSCvk17250.

Important

• To reinstall an HX server, download supported and compatible versions of the software. See the Cisco HyperFlex SystemsInstallation Guide for VMware ESXi for the requirements and steps.

• Important: For Intersight edge servers running older than 4.0(1a) CIMC version, HUU is the suggested mechanism to updatethe firmware.

Table 1: HyperFlex Software Versions for M4/M5 Servers

M5 Recommended FI/Server Firmware

*(be sure to review important notes above)

M4 Recommended FI/Server Firmware

*(be sure to review important notes above)

HyperFlex Release

4.0(4h)4.0(4h)4.0(2b)

4.0(4h)4.0(4h)4.0(2a)

4.0(4h)4.0(4h)4.0(1b)

4.0(4e)4.0(4e)4.0(1a)

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Physical Requirements

Physical Server Requirements

• For a HX220c/HXAF220c Cluster:

• Two rack units (RU) for the UCS 6248UP, 6332UP, 6332-16UP Fabric Interconnects (FI) or four RU for the UCS 6296UPFI

• HX220c Nodes are one RU each; for example, for a three-node cluster, three RU are required; for a four-node cluster, 4RU are required

• If a Top-of-Rack switch is included in the install, add at least two additional RU of space for the switch.

• For a HX240c/HXAF240c Cluster:

• Two rack units (RU) for the UCS 6248UP, 6332UP, 6332-16UP Fabric Interconnects (FI) or four RU for the UCS 6296UPFI

• HX240c Nodes are two RU each; for example, for a three-node cluster, six RU are required; for a four-node cluster, eightRU are required

• If a Top-of-Rack switch is included in the install, add at least two additional RU of space for the switch.

Although there is no requirement for contiguous rack space, it makes installation easier.

• The system requires two C13/C14 power cords connected to a 15-amp circuit per device in the cluster. At a minimum, there arethree HX nodes and two FI, and it can scale to eight HX nodes, two FI, and blade chassis.

• Up to 2 - 4x uplink connections for UCS Fabric Interconnects.

• Per best practice, each FI requires either 2x10 Gb optical connections in an existing network, or 2x10 Gb Twinax cables. EachHX node requires two Twinax cables for connectivity (10 Gb optics can be used). For deployment with 6300 series FI, use2x40GbE uplinks per FI and connect each HX node with dual native 40GbE.

• VIC and NIC Support: For details, see the Cisco HyperFlex Systems—Networking Topologies document.

Single FI HX deployment is not supported.Note

Network RequirementsVerify that your environment adheres to the following best practices:

• Must use a different subnet and VLANs for each network.

• Verify that each host directly attaches to a UCS Fabric Interconnect using a 10-Gbps cable.

• Do not use VLAN 1, the default VLAN, because it can cause networking issues, especially if Disjoint Layer 2 configuration isused. Use a different VLAN.

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• Configure the upstream switches to accommodate non-native VLANs. Cisco HX Data Platform Installer sets the VLANs asnon-native by default.

Each VMware ESXi host needs the following separate networks:

• Management traffic network—From the VMware vCenter, handles hypervisor (ESXi server) management and storage clustermanagement.

• Data traffic network—Handles the hypervisor and storage data traffic.

• vMotion network

• VM network

There are four vSwitches, each one carrying a different network:

• vswitch-hx-inband-mgmt—Used for ESXi management and storage controller management.

• vswitch-hx-storage-data—Used for ESXi storage data and HX Data Platform replication.

The vswitch-hx-inband-mgmt and vswitch-hx-storage-data vSwitches further divide into two port groups with assigned staticIP addresses to handle traffic between the storage cluster and ESXi host.

• vswitch-hx-vmotion—Used for VM and storage VMware vMotion.

This vSwitch has one port group for management, defined through VMware vSphere, which connects to all of the hosts in thevCenter cluster.

• vswitch-hx-vm-network—Used for VM data traffic.

You can add or remove VLANs on the corresponding vNIC templates in Cisco UCS Manager, and create port groups on thevSwitch.

• HX Data Platform Installer creates the vSwitches automatically.

• Ensure that you enable the following services in vSphere after you create the HX Storage Cluster:

• DRS (vSphere Enterprise Plus only)

• vMotion

• High Availability

Note

Port RequirementsIf your network is behind a firewall, in addition to the standard port requirements, VMware recommends ports for VMware ESXiand VMware vCenter.

• CIP-M is for the cluster management IP.

• SCVM is the management IP for the controller VM.

• ESXi is the management IP for the hypervisor.

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Verify that the following firewall ports are open:

Time Server

Essential InformationPort DestinationsSourceService/ProtocolPort Number

BidirectionalTime ServerEach ESXi Node

Each SCVM Node

UCSM

NTP/UDP123

HX Data Platform Installer

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Management addressesEach ESXi NodeHX Data PlatformInstaller

SSH/TCP22

Management addressesEach SCVM Node

Cluster managementCIP-M

UCSM managementaddresses

UCSM

CIMC IPs

Management addressesEach ESXi NodeHX Data PlatformInstaller

HTTP/TCP80

Management addressesEach SCVM Node

Cluster managementCIP-M

UCSM managementaddresses

UCSM

Management addressesEach ESXi NodeHX Data PlatformInstaller

HTTPS/TCP443

Management addressesEach SCVM Node

Cluster managementCIP-M

UCSM managementaddresses

UCSM

Management addressesEach ESXi NodeHX Data PlatformInstaller

vSphere SDK/TCP8089

vCenterHX Data PlatformInstaller

Heartbeat/UDP/TCP902

Each ESXi Node

Management addressesESXi IPs

CVM IPs

HX Data PlatformInstaller

Ping/ICMPNone

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Essential InformationPort DestinationsSourceService/ProtocolPort Number

Cluster managementCIP-MHX Data PlatformInstaller

UDP/TCP9333

Mail Server

Optional for email subscription to cluster events.

Essential InformationPort DestinationsSourceService/ProtocolPort Number

OptionalMail ServerEach SCVM Node

CIP-M

UCSM

SMTP/TCP25

Monitoring

Optional for monitoring UCS infrastructure.

Essential InformationPort DestinationsSourceService/ProtocolPort Number

OptionalUCSMMonitoring ServerSNMP Poll/UDP161

OptionalMonitoring ServerUCSMSNMP Trap/UDP162

Name Server

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Management addressesName ServerEach ESXi NodeDNS/TCP/UDP53 (external lookups)

Management addressesName ServerEach SCVM Node

Cluster managementName ServerCIP-M

Name ServerUCSM

vCenter

Essential InformationPort DestinationsSourceService/ProtocolPort Number

BidirectionalEach SCVM Node

CIP-M

vCenterHTTP/TCP80

BidirectionalEach ESXi Node

Each SCVM Node

CIP-M

vCenterHTTPS (Plug-in)/TCP443

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Essential InformationPort DestinationsSourceService/ProtocolPort Number

BidirectionalEach ESXi Node

Each SCVM Node

CIP-M

vCenterHTTPS (VC SSO)/TCP7444

BidirectionalEach ESXi Node

Each SCVM Node

CIP-M

vCenterHTTPS (Plug-in)/TCP9443

Each ESXi NodevCenterCIM Server/TCP5989

Introduced in ESXiRelease 6.5

Each ESXi NodevCenterCIM Server/TCP9080

This port must beaccessible from eachhost. Installation resultsin errors if the port is notopen from the HXInstaller to the ESXihosts.

Each ESXi NodevCenterHeartbeat/TCP/UDP902

User

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Management addressesEach ESXi NodeUserSSH/TCP22

Management addressesEach SCVM Node

Cluster managementCIP-M

HX Data PlatformInstaller

UCSM managementaddresses

UCSM

vCenter

SSO Server

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Essential InformationPort DestinationsSourceService/ProtocolPort Number

Management addressesEach SCVM NodeUserHTTP/TCP80

Cluster managementCIP-M

UCSM

HX Data PlatformInstaller

vCenter

Each SCVM NodeUserHTTPS/TCP443

CIP-M

UCSM managementaddresses

UCSM

HX Data PlatformInstaller

vCenter

vCenter

SSO Server

UserHTTPS (SSO)/TCP7444

vCenterUserHTTPS (Plug-in)/TCP9443

SSO Server

Essential InformationPort DestinationsSourceService/ProtocolPort Number

BidirectionalEach ESXi Node

Each SCVM Node

CIP-M

SSO ServerHTTPS (SSO)/TCP7444

Stretch Witness

Required only when deploying HyperFlex Stretched Cluster.

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Bidirectional,management addresses

Each CVM NodeWitnessZookeeper/TCP2181

2888

3888

Bidirectional,management addresses

Each CVM NodeWitnessExhibitor (Zookeeperlifecycle)/TCP

8180

10

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Potential futurerequirement

Each CVM NodeWitnessHTTP/TCP80

Potential futurerequirement

Each CVM NodeWitnessHTTPS/TCP443

Replication

Required only when configuring native HX asynchronous cluster to cluster replication.

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeData Services ManagerPeer/TCP

9338

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeReplication forCVM/TCP

3049

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeCluster Map/TCP4049

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeNR NFS/TCP4059

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeReplication Service9098

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeNR Master forCoordination/TCP

8889

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeHypervisor Service/TCP9350

SED Cluster

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Policy ConfigurationUCSM (Fabric A, FabricB, VIP)

Each SCVMManagement IP(including clustermanagement IP)

HTTPS443

Key ExchangeKVM ServerCIMC from each nodeTLS5696

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UCSM

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Bidirectional for eachUCS node

CIMC OOBEach CVM NodeEncryption etc./TCP443

OOB KVMUCSMUserKVM/HTTP81

OOB KVM encryptedUCSMUserKVM/HTTP743

Miscellaneous

Essential InformationPort DestinationsSourceService/ProtocolPort Number

Bidirectional, includecluster management IPaddresses

Each CVM NodeEach CVM NodeHypervisor Service/TCP9350

Bidirectional for eachCVM to other CVMs

Each CVM NodeEach CVM NodeCIP-M Failover/TCP9097

CVM outbound toInstaller

Each SCVM nodeEach SCVM nodeRPC Bind/TCP111

Service LocationProtocol

InstallerEach SCVM nodeInstaller/TCP8002

stDeploy makesconnection, any requestwith uri /stdeploy

Each SCVM nodeEach SCVM nodeApache Tomcat/TCP8080

Any request with uri/auth/

Each SCVM nodeEach SCVM nodeAuth Service/TCP8082

Robo deploymentsEach SCVM nodeEach SCVM nodehxRoboControl/TCP9335

Policy ConfigurationUCSM A/B and VIPEach CVM Mgmt IPincluding CIP-M

HTTPS/TCP443

Key ExchangeKMS ServerCIMC from each nodeTLS/TCP5696

GraphiteEach SCVM nodeEach SCVM nodeUDP8125

Service LocationProtocol

Each SCVM nodeEach SCVM nodeUDP427

SCVM outboundcommunication

Each SCVM nodeEach SCVM nodeUDP32768 to 65535

If you do not have standard configurations and need different port settings, refer to Table 7 Port Literal Values for customizingyour environment.

Tip

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HyperFlex External ConnectionsEssential InformationIP Address/ FQDN/

Ports/VersionDescriptionExternal Connection

All device connectors mustproperly resolvesvc.intersight.com and allowoutbound-initiated HTTPSconnections on port 443. Thecurrent HX Installer supportsthe use of an HTTP proxy.

The IP addresses of ESXimanagement must be reachablefrom Cisco UCS Manager overall the ports that are listed asbeing needed from installer toESXi management, to ensuredeployment of ESXimanagement from CiscoIntersight.

For more information, see theNetwork ConnectivityRequirements section of theIntersight Help Center.

HTTPS Port Number: 443

1.0.5-2084 or later(Auto-upgraded by CiscoIntersight)

Supported HX systems areconnected to Cisco Intersightthrough a device connector thatis embedded in the managementcontroller of each system.

Intersight Device Connector

Enabling Auto Support isstrongly recommended becauseit provides historical hardwarecounters that are valuable indiagnosing future hardwareissues, such as a drive failure fora node.

SMTP Port Number: 25Auto Support (ASUP) is thealert notification serviceprovided through HX DataPlatform.

Auto Support

Intersight ConnectivityConsider the following prerequisites pertaining to Intersight connectivity:

• Before installing the HX cluster on a set of HX servers, make sure that the device connector on the corresponding Cisco IMCinstance is properly configured to connect to Cisco Intersight and claimed.

• Communication between CIMC and vCenter via ports 80, 443 and 8089 during installation phase.

• All device connectors must properly resolve svc.intersight.com and allow outbound initiated HTTPS connections on port 443.The current version of the HX Installer supports the use of an HTTP proxy.

• All controller VM management interfaces must properly resolve svc.intersight.com and allow outbound initiated HTTPSconnections on port 443. The current version of HX Installer supports the use of an HTTP proxy if direct Internet connectivityis unavailable.

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• IP connectivity (L2 or L3) is required from the CIMC management IP on each server to all of the following: ESXi managementinterfaces, HyperFlex controller VMmanagement interfaces, and vCenter server. Any firewalls in this path should be configuredto allow the necessary ports as outlined in the Hyperflex Hardening Guide.

• Starting with HXDP release 3.5(2a), the Intersight installer does not require a factory installed controller VM to be present onthe HyperFlex servers.

When redeploying HyperFlex on the same servers, new controller VMs must be downloaded from Intersight into all ESXi hosts.This requires each ESXi host to be able to resolve svc.intersight.com and allow outbound initiated HTTPS connections on port443. Use of a proxy server for controller VM downloads is supported and can be configured in the HyperFlex Cluster Profile ifdesired.

• Post-cluster deployment, the new HX cluster is automatically claimed in Intersight for ongoing management.

Deployment InformationBefore deploying Cisco HX Data Platform and creating a cluster, collect the following information about your system.

Cisco UCS Fabric Interconnects (FI) Information

UCS cluster name

FI cluster IP address

UCS FI-A IP address

UCS FI-B IP address

Pool for KVM IP addresses

(one per HX node is required)

Subnet mask IP address

Default gateway IP address

00:25:B5:MAC pool prefix

(provide two hex characters)

adminUCS Manager username

Password

VLAN Information

Tag the VLAN IDs to the Fabric Interconnects.

HX Data Platform, release 1.7—Document and configure all customer VLANs as native on the FI prior to installation.

HX Data Platform, release 1.8 and later—Default configuration of all customer VLANs is non-native.

Note

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DescriptionVLAN NameVLAN IDNetwork

Use separate subnet and VLANs for each of the following networks:

Used for management traffic amongESXi, HX, and VMware vCenter;must be routable.

HypervisorManagementNetwork

Storage controller managementnetwork

VLAN for VMware ESXi andCisco HyperFlex (HX)management

Used for storage traffic and requiresL2.

Hypervisor Data Network

Storage controller data network

VLAN for HX storage traffic

Used for vMotion VLAN, ifapplicable.

vswitch-hx-vmotionVLAN for VM VMware vMotion

Used for VM/application network.vswitch-hx-vm-networkVLAN for VM network

Customer Deployment Information

Deploy the HX Data Platform using an OVF installer appliance. A separate ESXi server, which is not a member of the vCenter HXCluster, is required to host the installer appliance. The installer requires one IP address on the management network.

The installer appliance IP address must be reachable from the management subnet used by the hypervisor and the storage controllerVMs. The installer appliance must run on the ESXi host or on a VM Player/VMware workstation that is not a part of the clusterinstallation. In addition, the HXData Platform Installer VM IP address must be reachable by Cisco UCSManager, ESXi, and vCenterIP addresses where HyperFlex hosts are added.

Installer appliance IP address

Network IP Addresses

• Data network IPs in the range of 169.254.X.X in a network larger than /24 is not supported and should not be used.

• Data network IPs in the range of 169.254.254.0/24 must not be used.

Note

Data Network IP Addresses

(does not have to be routable)

Management Network IP Addresses

(must be routable)

Ensure that the Data and Management Networks are on different subnets for a successful installation.Important

Storage ControllerData Network (NotRequired for CiscoIntersight)2

Hypervisor DataNetwork (Not Requiredfor Cisco Intersight)1

Storage ControllerManagement Network

Hypervisor ManagementNetwork

ESXi Hostname*

Server 1:

Server 2:

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Data Network IP Addresses

(does not have to be routable)

Management Network IP Addresses

(must be routable)

Server 3:

Server 4:

Server 5:

Storage Cluster Data IPaddress

Storage ClusterManagement IP address

Subnet mask IP addressSubnet mask IP address

Default gateway IPaddress

Default gateway IPaddress

1 Data network IPs are automatically assigned to the 169.254.X.0/24 subnet based on MAC address prefix.2 Data network IPs are automatically assigned to the 169.254.X.0/24 subnet based on MAC address prefix.

* Verify DNS forward and reverse records are created for each host. If no DNS records exist, hosts are added to vCenter by IP addressinstead of FQDN.

VMware vMotion Network IP Addresses

vMotion Network IP Addresses (not configured by software)

•

•

•

•

•

Hypervisor Credentials

rootroot username

root password

VMware vCenter Configuration

HyperFlex communicates with vCenter through standard ports. Port 80 is used for reverse HTTP proxy. Port 443 is used forsecure communication to the vCenter SDK and may not be changed.

Note

vCenter FQDN or IP address

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vCenter admin username

username@domain

vCenter admin password

vCenter data center name

VMware vSphere compute cluster and storagecluster name

Single Sign-On (SSO)

SSO Server URL*

• This information is required only if the SSOURL is not reachable.

• This is automatic for ESXi version 6.0 andlater.

* SSO Server URL can be found in vCenter at vCenter Server > Manage > Advanced Settings, key config.vpxd.sso.sts.uri.

Network Services

• At least one DNS and NTP server must reside outside of the HX storage cluster.

• Use an internally-hosted NTP server to provide a reliable source for the time.

• All DNS servers should be pre-configured with forward (A) and reverse (PTR) DNS records for each ESXi host beforestarting deployment. When DNS is configured correctly in advance, the ESXi hosts are added to vCenter via FQDNrather than IP address.

Skipping this step will result in the hosts being added to the vCenter inventory via IP address and require users to changeto FQDN using the following procedure: Changing Node Identification Form in vCenter Cluster from IP to FQDN.

Note

DNS Servers

<Primary DNS Server IP address,Secondary DNS Server IP address, …>

NTP servers

<Primary NTP Server IP address,Secondary NTP Server IP address, …>

Time zone

Example: US/Eastern, US/Pacific

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Connected Services

Enable Connected Services(Recommended)

Yes or No required

Email for service request notifications

Example: name@company.com

Contacting Cisco TACYou can open a Cisco Technical Assistance Center (TAC) support case to reduce time addressing issues, and get efficient supportdirectly with Cisco Prime Collaboration application.

For all customers, partners, resellers, and distributors with valid Cisco service contracts, Cisco Technical Support providesaround-the-clock, award-winning technical support services. The Cisco Technical Support website provides online documents andtools for troubleshooting and resolving technical issues with Cisco products and technologies:

http://www.cisco.com/techsupport

Using the TAC Support CaseManager online tool is the fastest way to open S3 and S4 support cases. (S3 and S4 support cases consistof minimal network impairment issues and product information requests.) After you describe your situation, the TAC Support CaseManager automatically provides recommended solutions. If your issue is not resolved by using the recommended resources, TACSupport Case Manager assigns your support case to a Cisco TAC engineer. You can access the TAC Support Case Manager fromthis location:

https://mycase.cloudapps.cisco.com/case

For S1 or S2 support cases or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 support cases consistof production network issues, such as a severe degradation or outage.) S1 and S2 support cases have Cisco TAC engineers assignedimmediately to ensure your business operations continue to run smoothly.

To open a support case by telephone, use one of the following numbers:

• Asia-Pacific: +61 2 8446 7411

• Australia: 1 800 805 227

• EMEA: +32 2 704 5555

• USA: 1 800 553 2447

For a complete list of Cisco TAC contacts for Enterprise and Service Provider products, see http://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html.

For a complete list of Cisco Small Business Support Center (SBSC) contacts, see http://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html.

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