Cisco vWAAS on RHEL KVM, KVM on CentOS, and KVM in SUSE Linux

This chapter describes how to use Cisco vWAAS on RHEL KVM, KVM on CentOS, and KVM in SUSE Linux, and contains the following sections:

About vWAAS on RHEL KVM, KVM on CentOS, and KVM in SUSE Linux

Cisco vWAAS on RHEL KVM is a virtual WAAS appliance that runs on a KVM Hypervisor. The Cisco vWAAS on RHEL KVM solution extends the capabilities of Cisco ISR-WAAS and Cisco vWAAS running on the Cisco UCS-E Series and the Cisco Enterprise Network Compute System (Cisco ENCS) 5400-W Series.

Consider the following interoperability guidelines for Cisco vWAAS on the KVM hypervisor platforms:

  • Cisco vWAAS on RHEL KVM: Supported for Cisco vWAAS in WAAS Version 6.2.x and later.
note.gif

Noteblank.gif Cisco vWAAS on RHEL KVM can also be deployed as a TAR archive (tar.gz) to deploy Cisco vWAAS on Cisco Network Functions Virtualization Infrastructure Software (Cisco NFVIS). The Cisco NFVIS portal is used to select the tar.gz file to deploy vWAAS.


  • Cisco vWAAS on KVM on CentOS: Supported for Cisco vWAAS in WAAS version 6.2.3b and later.
  • Cisco vWAAS on KVM in SUSE Linux: Supported for all Cisco vWAAS and Cisco vCM models that are supported on KVM on CentOS, for Cisco vWAAS in Cisco WAAS Version 6.4.1b and later.

Supported Host Platforms, Software Versions, and Disk Type

Table 6-1 shows the platforms and software versions supported for Cisco vWAAS on RHEL KVM.

Table 6-1 Platforms and Software Versions Supported for Cisco vWAAS on RHEL KVM

Cisco PID and Device Type
Earliest Cisco WAAS Version Supported
Cisco Host Platforms
Earliest RHEL and CentOS Host Version Supported
Disk Type
  • PID: OE-VWAAS-KVM
  • Device Type: OE-VWAAS-KVM
  • 6.2x
  • UCS
  • UCS-E Series
  • Red Hat Enterprise Linux (RHEL) Server 7.1
  • CentOS Linux 7.2.1511 (Core)
  • virtio
  • 6.4.3d and later
  • UCS
  • UCS-E Series
  • RHEL Server 7.5
  • RHEL Server 7.6
  • CentOS Linux 7.5.1804 (Core)
  • CentOS Linux 7.6.1810 (Core)
  • virtio

Cisco vWAAS on RHEL KVM System Requirements

Cisco vWAAS on RHEL KVM has a predefined configuration with specific requirements for CPU and memory. However, there are some features that are customizable. Table 6-2 shows the supported configuration for Cisco vWAAS on RHEL KVM, and, where applicable, highlights the customizable features.

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Noteblank.gif Data disk size varies according to the model shown in Table 10-4. While deploying RHEL KVM, Cisco vWAAS and Cisco vCM should verify that enough disk space is available in the respective partition.


Table 6-2 Cisco vWAAS on RHEL KVM-Supported Configuration

Feature/Component
Description

Platform

Three-disk platform of:

  • 10 GB system
  • 4 GB flash
  • Data disk (customizable, depending on number of connections)

RHEL version for Cisco vWAAS on KVM

RHEL 7.2

Cisco vWAAS Memory Requirements

  • vWAAS-150: 4 GB
  • vWAAS-200: 4 GB
  • vWAAS-750: 4 GB
  • vWAAS-1300: 6 GB
  • vWAAS-2500: 8 GB
  • vWAAS-6000: 11 GB
  • vWAAS-12000: 18 GB
  • vWAAS-50000: 48 GB

Interception Method

Web Cache Communication Protocol (WCCP) or Cisco AppNav

Device Emulation

Cisco vWAAS on RHEL KVM uses Quick Emulator-KVM (QEMU-KVM).

Management

Cisco WAAS Central Manager and serial console

Licensing

For information on Cisco vWAAS licensing, contact your Cisco account representative.

MAC address

Customizable

Cisco vWAAS on RHEL KVM in Cisco WAAS Version 5.x to 6.2.x

This section contains the following topics:

TAR Archive Package for Cisco vWAAS on RHEL KVM in Cisco WAAS Version 5.x to 6.2.x

For Cisco vWAAS on RHEL KVM in Cisco WAAS Version 5.x through 6.2.x, Cisco provides a TAR archive or No Payload Encryption (NPE) TAR archive package for each Cisco vWAAS connection profile (examples shown in Table 6-3) and for each Cisco vCM connection profile (examples shown in Table 6-4).

Table 6-5 shows the files included for deploying Cisco vWAAS on RHEL KVM, and for deploying Cisco vWAAS with Cisco Network Functions Virtualization Infrastructure Software (Cisco NFVIS). For more information on Cisco NFVIS and Cisco Network Functions Virtualization (Cisco NFV), see the Cisco Enterprise Network Functions Virtualization Solution Overview. For more information on Cisco vWAAS with Cisco NFVIS, see the chapter “Cisco vWAAS with Cisco Enterprise NFVIS” .

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Noteblank.gif For a listing of hypervisor OVA, zip, and tar.gz files for Cisco vWAAS, see the Cisco Wide Area Application Services (WAAS) Download Software page and select the Cisco WAAS software version used with your Cisco vWAAS instance.


Table 6-3 OVA Package Format Examples for Cisco vWAAS on RHEL KVM in Cisco WAAS Version 5.x to 6.2.x

Package Format
File Format Example

Cisco KVM 150 package file

Cisco KVM 150 package file for NPE

  • Cisco-KVM-vWAAS-150-6.2.3d-b-68.tar.gz
  • Cisco-KVM-vWAAS-150-6.2.3d-b-68-npe.tar.gz

Cisco KVM 200 package file

Cisco KVM 200 package file for NPE

  • Cisco-KVM-vWAAS-200-6.2.3d-b-68.tar.gz
  • Cisco-KVM-vWAAS-200-6.2.3d-b-68-npe.tar.gz

Cisco KVM 750 package file

Cisco KVM 750 package file for NPE

  • Cisco-KVM-vWAAS-750-6.2.3d-b-68.tar.gz
  • Cisco-KVM-vWAAS-750-6.2.3d-b-68-npe.tar.gz

Cisco KVM 1300 package file

Cisco KVM 1300 package file for NPE

  • Cisco-KVM-vWAAS-1300-6.2.3d-b-68.tar.gz
  • Cisco-KVM-vWAAS-1300-6.2.3d-b-68-npe.tar.gz

Cisco KVM 2500 package file

Cisco KVM 2500 package file for NPE

  • Cisco-KVM-vWAAS-2500-6.2.3d-b-68.tar.gz
  • Cisco-KVM-vWAAS-2500-6.2.3d-b-68-npe.tar.gz

Cisco KVM 6000 package file

Cisco KVM 6000 package file for NPE

  • Cisco-KVM-vWAAS-6000-6.2.3d-b-68.tar.gz
  • Cisco-KVM-vWAAS-6000-6.2.3d-b-68-npe.tar.gz

Table 6-4 Cisco OVA Package Formats for Cisco vCM in Cisco WAAS Version 5.x to 6.2.x

Package Format
File Format Example

Cisco KVM 100N package file

Cisco KVM 100N package file for NPE

  • Cisco-KVM-vCM-100N-6.2.3d-b-68.tar.gz
  • Cisco-KVN-vCN-100N-6.2.3d-npe-b-68-npe.tar-gz

Table 6-5 Installation Files for Cisco vWAAS on RHEL KVM and Cisco vWAAS with Cisco NFVIS in WAAS 5.x to 6.2.x

Installation File
RHEL KVM Installation
Cisco NFVIS Installation
  • Cisco signature envelope file
    Verifies that this deployment is from Cisco.

Yes

Yes

  • Manifest file with checksums

Yes

Yes

  • image_properties.xml
    A VM configuration template file used on the Cisco NFVIS platform.

No

Yes

  • package.mf template file and bootstrap-cfg.xml
    These two files work together on the Cisco NFVIS platform with the image_properties.xml file as Day-0 configuration template.

No

Yes

  • INSTRUCTIONS.TXT
    Describes the procedure for deploying the virtual instance and for using the launch.sh file.

Yes

No

Yes

No

  • vm.xml
    Configuration file needed for vWAAS deployment using virtual bridge or Open Virtual Switch (OVS) present in host mac.

Yes

No

  • VM disk images
    A 4 GB flash disk, 10 GB system disk, and data disk (data disk size is dependent on your connection profile).

Yes

Yes

Yes

No

Installing Cisco vWAAS on RHEL KVM in Cisco WAAS Version 5.x to 6.2.x

This section contains the following topics:

Using the Launch Script to Deploy Cisco vWAAS on RHEL KVM in WAAS Version 5.x to 6.2.x

To use the launch script (launch.sh) to deploy Cisco vWAAS on RHEL KVM, follow these steps:


Step 1blank.gif Launch the Cisco vWAAS VM. (You must have root permissions to launch the Cisco vWAAS VM.)

Step 2blank.gif Create a new directory to hold the extracted contents of tar.gz.

Step 3blank.gif Copy tar.gz into the specified directory.

Step 4blank.gif To extract the tar.gz gzip file, use this command:

tar -zxvf Cisco-KVM-vWAAS-ModelNumber-Version-BuildNumber.tar.gz

Example:

tar -zxvf Cisco-KVM-vWAAS-200-6.2.3d.b-68.tar.gz

The contents of the tar.gz file are:

    • INSTRUCTIONS.TXT
    • Disk-0.qcow
    • Disk-1.qcow
    • Disk-2.qcow
    • vm_tap.xml
    • vm_macvtap.xml
    • launch.sh
    • ezdeploy.sh
    • ezdeploy.qstatus.exp

Step 5blank.gif To launch Cisco vWAAS, run the launch.sh script:

  • To check the prerequisite conditions, use the /launch.sh check command.
  • To launch Cisco vWAAS using the OVS bridge, use the./launch.sh vm-name bridge bridge1-name bridge2-name command.

blank.gif bridge1-name and bridge2-name: The OVS bridges already created in the host.

note.gif

Noteblank.gif Before using the /launch.sh vm-name bridge bridge1-name bridge2-name command, verify that the OVS bridges are created and are in working state.


  • To launch Cisco vWAAS using macvtap, use the /launch.sh vm-name macvtap interface1-name interface2-name command.

blank.gif vm-name: The specified name of the Cisco vWAAS VM.

blank.gif interface1-name and interface2-name: The specified Ethernet interfaces of the host machine.

The Cisco vWAAS is launched.

    • (Optional) To view Cisco vWAAS, use the VM GUI or the virsh list command.
    • (Optional) To connect to the console, use the VM GUI or the virsh console vm-name command.
    • (Optional) To power down Cisco vWAAS, use the virsh destroy vm-name command.
    • (Optional) To undefine Cisco vWAAS:

1. Use the virsh undefine vm-name command.

2. Remove the directory with the specified vm-name.

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Noteblank.gif If you want to create another Cisco vWAAS of the same model, repeat this procedure. The specified directory, for example, Basic, will then have two VMs, Basic1 and Basic2. Disks for these VMs will be stored in the subdirectories Basic1 and Basic2, respectively.



 

Using the EzDeploy Script to Deploy Cisco vWAAS on RHEL KVM on Cisco UCS-E in WAAS Version 5.x to 6.2.x

Use the EzDeploy script for simplified deployment of a Cisco vWAAS. Note that the EzDeploy script is not used for the Cisco vCM.

The following are the prerequisites for launching the EzDeploy script:

  • To launch the Cisco vWAAS VM, you must have root permission.
  • The following software and utility packages must be installed before using the EzDeploy script:

blank.gif QEMU

blank.gif Libvirt

blank.gif Genisoimage

blank.gif Expect script (required only if you choose to run EzDeploy’s capability for auto-monitoring Cisco WAAS Central Manager registration status)

  • Verify the following:

blank.gif There is sufficient disk and RAM memory to deploy another Cisco vWAAS.

blank.gif Compatibility of software versions.

blank.gif Availability and readiness of network connectivity.

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Noteblank.gif Because EzDeploy leverages the launch.sh script to launch a Cisco vWAAS, the launch.sh script, as well as all the necessary files associated with it, must be present, intact, and not manually removed or manually moved elsewhere.


To use the EzDeploy script (ezdeploy.sh) to deploy Cisco vWAAS on RHEL KVM on Cisco UCS-E, follow these steps:


Step 1blank.gif Launch the Cisco vWAAS VM.

Step 2blank.gif Create a new directory to hold the extracted contents of tar.gz.

Step 3blank.gif Copy tar.gz into the specified directory.

Step 4blank.gif To extract the tar.gz gzip file, use the tar -zxvf Cisco-KVM-vWAAS-200-6.2.0.b-80.tar.gz command.

The contents of the tar.gz file are:

    • INSTRUCTIONS.TXT
    • Disk-0.qcow
    • Disk-1.qcow
    • Disk-2.qcow
    • vm_tap.xml
    • vm_macvtap.xml
    • launch.sh
    • ezdeploy.sh
    • ezdeploy.qstatus.exp

Step 5blank.gif Run the ezdeploy.sh script:

a.blank.gif During execution of the ezdeploy.sh, you are prompted for bootstrap configuration parameters:

blank.gif vWAAS KVM name: The name is dependent on whether or not you provide the Cisco vWAAS’ bootstrap configuration.

If you have not provided the Cisco vWAAS’ bootstrap configuration: the name is set as the name of the guest KVM to be created. not the Cisco vWAAS’ host name.

If you have provided the vWAAS’ bootstrap configuration: the Cisco vWAAS’ host name is set and used in both instances.

blank.gif Cisco vWAAS local IP address and mask

blank.gif Default GW IP address: An address on the ISR-4000 series RP that is reachable by the Cisco vWAAS and has external network connectivity

blank.gif IP address of the Cisco WAAS Central Manager with which the Cisco vWAAS will register

blank.gif One NTP server address, without authentication. If you want to have authentication or multiple NTP servers, use the Cisco WAAS Central Manager to configure these after the Cisco vWAAS is powered up.

blank.gif (Optional) DNS server address

The ezdeploy.sh script performs a validation before accepting each parameter.

b.blank.gif After input collection is completed, the following information is saved:

blank.gif The bootstrap configuration is saved in the bootstrap-cfg.xml file in the directory created for this KVM.

blank.gif The execution log and error log of the script are saved in the ezdeploy-log.txt file in the directory created for this KVM.

blank.gif For the Cisco vWAAS in this KVM, the error log is saved in errorlog/ezdeploy-errorlog.txt.

note.gif

Noteblank.gif By default, all configuration and error logs saved in the specified KVM directory are not deleted, even if they have recorded errors. Therefore, you should allow for debugging. If you do not want to generate log files, you must confirm this choice at the end of the script execution, after input entry.


c.blank.gif After the EzDeploy script is run, the Cisco vWAAS is fully up and running. Registration with the specified Cisco WAAS Central Manager and the NTP server are automatically started after installation of their corresponding CLIs.

  • Optional: To view Cisco vWAAS, use the VM GUI or the virsh list command.
  • Optional: To connect to the console, use the VM GUI or the virsh console vm-name command.
  • Optional: To power down Cisco vWAAS, use the virsh destroy vm-name command.
  • Optional: To undefine Cisco vWAAS:

1. Use the virsh undefine vm-name command.

2. Remove the directory with the specified vm-name.


 

Cisco vWAAS on RHEL KVM in Cisco WAAS Version 6.4.1 and Later

This section contains the following topics:

Unified OVA Package for Cisco vWAAS on KVM in WAAS Version 6.4.1 and Later

For Cisco vWAAS on RHEL KVM in Cisco WAAS Version 6.4.x and later, Cisco provides a single, unified OVA or NPE OVA package for each hypervisor type, which can be used with all Cisco vWAAS models for that hypervisor.

Each unified OVA package file is a preconfigured VM image that is ready to run on a particular hypervisor. The launch script for each unified OVA package provides the model and other required parameters to launch vWAAS with WAAS in the required configuration.

The following are examples of the unified OVA and NPE OVA package filenames for vWAAS on RHEL KVM:

  • OVA: Cisco-KVM-vWAAS-Unified-6.4.3c-b-42.tar
  • NPE OVA: Cisco-KVM-vWAAS-Unified-6.4.3c-b-42-npe.tar

The unified OVA package for vWAAS on RHEL KVM and KVM on CentOS contains the following files:

  • Flash disk image
  • Data system disk
  • Akamai disk
  • INSTRUCTIONS.TXT: Describes the procedure for deploying the virtual instance and using the launch.sh file.
  • package.mf template file and bootstrap-cfg.xml: These two files work together on the Cisco NFVIS platform with the image_properties.xml file as Day-0 configuration template.
  • ezdeploy.sh: The script used to deploy vWAAS on UCS-E.
  • exdeploy_qstatus.exp: The dependent file for the ezdeploy.sh script image_properties.xml. A VM configuration template file used on the Cisco NFVIS platform.
  • launch.sh: The launch script to deploy Cisco vWAAS on Linux KVM.
  • vm_macvtap.xml: Configuration file for vWAAS deployment using host machine interfaces with the help of the macvtap driver.
  • vm_tap.xml: Configuration file for vWAAS deployment using virtual bridge or Open Virtual Switch (OVS) present in the host machine.

Installing Cisco vWAAS on KVM in Cisco WAAS Version 6.4.1 and Later

This section contains the following topics:

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Noteblank.gif For how to install Cisco vWAAS with Cisco NFVIS on the Cisco ENCS 5400-W Series, see the Cisco vWAAS Bundled Image Upgrade for ENCS 5400 Series, with RMA Process for Cisco EOS/EOL WAVE Devices.


Using the Launch Script to Deploy Cisco vWAAS on RHEL KVM on CentOS in Cisco WAAS Version 6.4.1 and Later

To use the launch script (launch.sh) to deploy Cisco vWAAS or vCM on RHEL KVM on CentOS, follow these steps:


Step 1blank.gif At [root@localhost hostname] enter the following:

[root@localhost hostname]#./launch.sh unified mactap enp1s0f0 enp1s0f0
 

The Model Menu is displayed:

--- Model Menu ---
 
1. vWAAS-150
2. vWAAS-200
3. vWAAS-750
4. vWAAS-1300
5. vWAAS-2500
6. vWAAS-6000R
7. vWAAS-6000
8. vWAAS-12000
9. vWAAS-50000
10. vCM-100N
11. vCM-500N
12. vCM-1000N
13. vCM-2000N
 
Select the model type :

 

Step 2blank.gif Enter the number of the Cisco vWAAS or Cisco vCM model for your system.

After you select the Cisco vWAAS or Cisco vCM model type, the launch script completes the RHEL CentOS KVM deployment.


 

Using the EzDeploy Script to Deploy Cisco vWAAS on RHEL KVM on CentOS in Cisco WAAS Version 6.4.1 and Later

To use the EzDeploy script (ezdeploy.sh) to deploy Cisco vWAAS or vCM on RHEL KVM on CentOS, for Cisco vWAAS models up to 6,000 connections, follow these steps:


Step 1blank.gif At [root@localhost ezdeploy] enter the following:

[root@localhost ezdeploy]#./ezdeploy.sh
 

Step 2blank.gif The Model Menu is displayed:

--- Model Menu ---
 
1. vWAAS-150
2. vWAAS-200
3. vWAAS-750
4. vWAAS-1300
5. vWAAS-2500
6. vWAAS-6000R
7. vWAAS-6000
 
Select the model type :

 

Step 3blank.gif Enter the number of the Cisco vWAAS model type for your system.

After you select the Cisco vWAAS model type, the EzDeploy script completes the RHEL KVM/KVM on CentOS deployment.


 

Using the Unified OVA Package to Deploy Cisco vWAAS with Cisco NFVIS

To use the unified OVA package to deploy Cisco vWAAS on RHEL KVM on CentOS with Cisco NFVIS, follow these steps:


Step 1blank.gif In the Navigation pane of the Cisco Enterprise NFVIS portal, choose VM Life Cycle > Deploy.

The registered VM images are displayed in the VM Deployment window.

Step 2blank.gif Select the Cisco vWAAS as the VM.

Step 3blank.gif Drag and drop the Cisco vWAAS in the Network Topology area.

After you select Cisco vWAAS as the VM, the Cisco vWAAS attributes and attribute choices are displayed in the VM Details pane.

Step 4blank.gif Enter the following information in the VM Details pane:

a.blank.gif In the VM Name field, edit the Cisco vWAAS name for your system.

b.blank.gif At the Image drop-down list, choose the unified OVA package for the Cisco vWAAS.

c.blank.gif At the Profile drop-down list, choose the Cisco vWAAS connection profile for your system.

d.blank.gif Other fields are automatically filled in by the system.

Step 5blank.gif Connect the Cisco vWAAS to a specified network by dragging the pointed arrow from the Cisco vWAAS to the specified network.

note.gif

Noteblank.gif During this process, the VM Details pane displays the Virtual Network Interface Card (vNIC) details: VM name, network name, and vNIC ID. The vNIC ID number is automatically generated; you can change this number, if needed, by using the vNIC ID drop-down list.


Step 6blank.gif Click Deploy.

The window is refreshed to display the deployment status.


 

Operating Guidelines for Cisco vWAAS on RHEL KVM/KVM on CentOS

This section contains the following topics:

Interoperability Guidelines for Cisco vWAAS on KVM and KVM on CentOS

Consider the following interoperability guidelines for Cisco vWAAS on KVM:

Interoperability guidelines for Cisco WAAS versions and Cisco vWAAS on KVM:

  • Cisco vWAAS on RHEL KVM is available for vWAAS in WAAS Version 6.2.1 and later.
  • Cisco vWAAS on KVM on CentOS is available for vWAAS on WAAS Version 6.2.3x and later.

Interoperability guidelines for OVS and vWAAS on KVM:

  • The Cisco Discovery Protocol (CDP) is not supported for Open Virtual Switch (OVS) on RHEL KVM on CentOS, therefore the show cdp command cannot be used for Cisco vWAAS on RHEL KVM on CentOS.
  • For Cisco vWAAS in WAAS Version 6.2.3x and later, there is inline Cisco vWAAS support for the OVS switch, with additional settings in Cisco vWAAS.

To configure inline Cisco vWAAS support for the OVS switch:

1.blank.gif Install CentOS 7.2 on UCS-C240.

2.blank.gif Configure OVS switch on the KVM host.

3.blank.gif Deploy the KVM vWAAS OVAs with the OVS switch on KVM host.

4.blank.gif Power off the Cisco vWAAS.

5.blank.gif Add two additional interfaces.

6.blank.gif Using the virt-manager, map the bridge ID in Cisco vWAAS:
[root@localhost kvm]# virsh edit vwaas-name

The domain vWAAS XML configuration is changed.

7.blank.gif Using the virt-manager, edit the virtual type:
virtualport type=’openvswitch’/

8.blank.gif Example:

<interface type='bridge'>

<mac address='52:54:00:ea:3f:7b'/>

<source bridge='br2'/>

<virtualport type='openvswitch'/>

<model type='virtio'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>

</interface>

<interface type='bridge'>

<mac address='52:54:00:7f:7c:99'/>

<source bridge='br3'/>

<virtualport type='openvswitch'/>

<model type='virtio'/>

<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>

</interface>

Traffic Interception Methods for Cisco vWAAS on RHEL KVM

For traffic interception for Cisco vWAAS on RHEL KVM, you can use WCCP (WCCP GRE or WCCP L2) or Cisco AppNav.

note.gif

Noteblank.gif When you use any of the traffic interception methods for Cisco vWAAS on RHEL KVM, you must disable Generic Receive Offload (GRO) on the Cisco UCS NIC. Use the ethtool -K nic_interface_name gro off command on the KVM host to disable GRO, for example: ethtool -K enp3sof2 gro off. If you do not disable GRO, traffic is not recognized, and packets are discarded.

If you upgrade the Cisco UCS NIC firmware to the latest version, you do not have to disable the GRO parameter.


For more information on configuring traffic interception methods, see the Cisco Wide Area Application Services Configuration Guide.

Upgrade and Downgrade Guidelines for Cisco vWAAS on RHEL KVM

Consider the following guidelines when upgrading or downgrading your WAAS system with vWAAS on KVM:

  • Cisco vWAAS on KVM is used in Cisco WAAS Version 6.2.1 and later. You cannot downgrade Cisco vWAAS on KVM or vCM on KVM devices to a version earlier than Cisco WAAS Version 6.2.1.
  • When upgrading Cisco vWAAS, do not upgrade more than five Cisco vWAAS nodes at the same time on a single Cisco UCS device. Upgrading more than five Cisco vWAAS nodes at the same time may cause the Cisco vWAAS devices to go offline and diskless mode.
  • For a Cisco vCM-100 model used with the RHEL KVM or KVM on CentOS hypervisor, with the default memory size of 2 GB:

When you upgrade to WAAS Version 5.2.1 from an earlier version, or downgrade from WAAS Version 5.2.1 to an earlier version, and use either the restore factory-default command or the restore factory-default preserve basic-config command, the vCM-100 may not come up due to GUID Partition Table (GPT) boot order errors.

caut.gif

Caution blank.gif The restore factory-default command erases user-specified configuration information stored in the flash image, including the starting configuration of the device, and also removes data from the disk, user-defined partitions, and the entire Central Manager database.

To resolve this situation, follow these steps:

1. Power down the Cisco vWAAS using the virsh destroy vmname command or the virt manager.

2. Power up the vWAAS using the virsh start vmname command or the virt manager.

note.gif

Noteblank.gif This upgrade-downgrade scenario does not occur for Cisco vCM-100 models whose memory size is upgraded to 4 GB.