Table Of Contents
Cisco Wide Area Application Services Upgrade Guide
Information About Upgrading to Version 4.1
WAAS Versions and Upgrade Path
Deprecated Features
Upgrade Prerequisites and Guidelines
Cisco RAID Controller Firmware Upgrade and Validation
WAAS Software Upgrade Guidelines
Capacity Planning
Upgrade Methods
Upgrade Sequence
Upgrading the Central Manager WAAS Software
Creating a Backup of the Primary Central Manager
Upgrading the Standby Central Manager
Upgrading the Primary Central Manager
Upgrading the Branch WAAS Software
Preparing to Upgrade the Branch WAE
Checking the Health of the WAE devices
Displaying and Saving Device Information
Upgrading the Branch WAE Software
Upgrading the Data Center WAAS Software
Preparing to Upgrade Data Center WAAS Software
Upgrading the Data Center WAE
Migrating from CIFS Legacy Mode to CIFS Accelerator Mode
Migrating Preposition Directives
Performing a Disruptive Migration
Performing a Graceful Migration
Data Center Preparation
Migrating Branch WAE Devices from CIFS Legacy Mode to CIFS Accelerator Mode
Removing CIFS Legacy Configurations from Data Center WAE Devices
Additional Information—CM Downgrade and Database Rollback
Backing Up the CM Database
Restoring the CM Databases
Restoring the Standby CM Database
Restoring the Primary CM Database
Downgrading to a Previous Version
Additional Information—Registering an Upgraded WAE with the CM
Additional Information—Performing a Branch WAE Software Downgrade
Additional Information—Performing WCCP Validity Testing
Additional Information—Performing CIFS Validity Testing and Performing a Rollback
Preparing the Shared Server and Client for CIFS Validity Testing
Performing a Manual CIFS Performance Test with WAAS
Evaluating the Manual Test Results
Rolling Back from CIFS Accelerator Mode to CIFS Legacy Mode
Related Documentation
Obtaining Documentation, Obtaining Support, and Security Guidelines
Cisco Wide Area Application Services Upgrade Guide
Published: May 27, 2010
Software Version 4.1
This document describes how to upgrade Cisco Wide Area Application Services (WAAS) from software release 4.0 to 4.1.x. This document also describes how to migrate an existing WAAS 4.0.x legacy Common Internet File System (CIFS) infrastructure to the CIFS application accelerator introduced in WAAS 4.1.
Note 
The procedures in this note contain CLI command examples. For more information about the commands used in the procedures, see the Cisco Wide Area Application Services Command Reference.
This document contains the following sections.
•Information About Upgrading to Version 4.1
•Upgrade Prerequisites and Guidelines
•Upgrade Methods
•Upgrade Sequence
•Upgrading the Central Manager WAAS Software
•Upgrading the Branch WAAS Software
•Upgrading the Data Center WAAS Software
•Migrating from CIFS Legacy Mode to CIFS Accelerator Mode
•Additional Information—CM Downgrade and Database Rollback
•Additional Information—Registering an Upgraded WAE with the CM
•Additional Information—Registering an Upgraded WAE with the CM
•Additional Information—Performing WCCP Validity Testing
•Additional Information—Performing CIFS Validity Testing and Performing a Rollback
•Related Documentation
•Obtaining Documentation, Obtaining Support, and Security Guidelines
Information About Upgrading to Version 4.1
This section provides information for upgrading to the 4.1.x release and includes the following topics:
•WAAS Versions and Upgrade Path
•Deprecated Features
WAAS Versions and Upgrade Path
Upgrading to release 4.1.x is supported from certain older releases only. If you have a WAAS device that is running a release from which upgrading directly to release 4.1.x is not supported, first upgrade the device to a supported intermediate release, and then upgrade to the desired 4.1.x release.
Table 1-1 shows the upgrade path for upgrading a WAAS device to release 4.1.x.
Table 1-1 WAAS Versions and Update
|
Current WAAS Software
|
Intermediate Upgrade Version
|
Final Upgrade Version
|
4.0.x (pre 4.0.13) |
4.0.13 or 4.0.17, 4.0.19 or 4.0.27) |
4.1.1x |
4.0.x (pre 4.0.13) |
4.0.13 or 4.0.17, 4.0.19 or 4.0.27 |
4.1.3x |
4.0.x (pre 4.0.19) |
4.0.19, 4.0.27, 4.1.1d, 4.1.3, 4.1.3b |
4.1.5x |
4.0.x (pre 4.0.19) |
4.0.19, 4.0.27, 4.1.1d, 4.1.3, 4.1.3b, 4.1.5c, 4.1.5f |
4.1.7x |
Note To upgrade the WAAS network to WAAS 4.1.x, the Central Manager must be at an equal or later software version than the other WAE devices in the network.
For important upgrade details, consult the WAAS Release Note for Cisco Wide Area Application Services for the software version to which you want to upgrade.
Deprecated Features
With the introduction of release 4.1, the following features have been deprecated and are no longer supported:
•WAFS Disconnected Mode—Disconnected mode allows CIFS clients to continue to browse the cache directory and read fully cached files on an Edge WAE when a WAN failure occurs. Because the Edge WAE cannot verify its cached data against the file server during a WAN failure, CIFS clients are provided with read-only access to the cached data. When the WAN connection between the Edge WAE and core cluster is restored, the Edge WAE switches back to regular connected mode.
•WAFS File Blocking—The file-blocking option allows an administrator to define one or more file-blocking directives that prevent users from opening, creating, or copying files that match a defined filename pattern.
Upgrade Prerequisites and Guidelines
This section describes the upgrade prerequisites and guidelines. Consult the WAAS Release Note for Cisco Wide Area Application Services of the particular WAAS software version for additional requirements and guidelines.
This section includes the following topics:
•Cisco RAID Controller Firmware Upgrade and Validation
•WAAS Software Upgrade Guidelines
•Capacity Planning
Cisco RAID Controller Firmware Upgrade and Validation
Before upgrading the software, you must upgrade the WAE firmware to avoid issues on WAE-674, WAE-7341, and WAE-7371 devices. We recommend using Firmware version L4_15418 or later.
The symptoms of firmware issues are as follows:
•Syslog output contains several instances of the following message:
WAAS-SYS-3-900000: sd 0:0:0:0: rejecting I/O to offline device."
•A sysreport and running-config cannot be generated and copied to /local/local1.
Both of the above symptoms are an indication of the file system becoming read only during traffic flow.
•An increasing number of pending connections appear in the output of the show statistics tfo command, indicating that new connections cannot be optimized. You can use this command to proactively check the functionality of the system.
The solution is to upgrade to the 5.2-0 (15418) RAID Controller Firmware, which can be found on Cisco.com at the Cisco Wide Area Application Services (WAAS) Firmware Downloads (registered customers only) page. The firmware binary image is named L4_15418_FIRMWARE.bin.
Instructions for applying and validating the firmware update are posted on cisco.com together with the firmware and are named L4_15418_FIRMWARE.pdf.
WAAS Software Upgrade Guidelines
Observe the following guidelines before you upgrade the software:
•Make sure the IOS version on the router/switch has been scrubbed for WCCP issues for your specific platform. If this was not done and there is a current active WAAS network, disable WCCP in the routers/switches in the data center and all branches before the CM and branch software upgrade to 4.1.x.
•If an IOS bug scrub has been performed and meets requirements for WCCP, the process to follow is located in each specific WAAS version Release Notes.
•Perform the migration of CIFS legacy mode to CIFS accelerator mode in a separate change window from the WAAS software version upgrade.
•The minimum firmware release required is 15418 for all WAE-7371, WAE-7341, and WAE- 674 devices.
Capacity Planning
Capacity planning is an ongoing process as branches and applications are added. Check the WAE devices to make sure that they are providing adequate caching and optimization and that connection limits are not exceeded.
Upgrade Methods
The following three methods are used to perform the WAAS upgrade and transfer the new software image onto the WAE devices in the WAAS network:
•Use the Central Manager to push out the WAAS software image to WAAS devices.
•Install the software image directly using the Rescue CD to perform a clean install (not an upgrade), which deletes the previous WAAS software image, deletes any cache, and so forth.
•Use FTP or TFPT directly on the WAE via the CLI.
The last method is described in this document. The other methods are described in the Cisco Wide Area Application Services Configuration Guide chapter named "Maintaining Your WAAS System."
Upgrade Sequence
To upgrade a WAAS network to WAAS 4.1.x, the software version installed on the Central Manager (CM) must be equal to or later than the version installed on the other WAE network devices. For this reason, you must upgrade the Central Managers before you upgrade the rest of the WAE devices.
The upgrade process consists of the following steps:
1. Create a back up of the Central Manager database and save it to an external hard drive (see the "Creating a Backup of the Primary Central Manager" section).
2. Upgrade the Secondary Central Manager if present (see the "Upgrading the Standby Central Manager" section).
3. Upgrade the Primary Central Manager (see the "Upgrading the Primary Central Manager" section).
4. Upgrade the other WAE network devices (see the "Upgrading the Branch WAAS Software" section).
Upgrading the Central Manager WAAS Software
This section describes how to back up the Primary Central Manager, update the Secondary Central Manager (if present), and update the Primary Central Manager.
This section contains the following topics:
•Creating a Backup of the Primary Central Manager
•Upgrading the Standby Central Manager
•Upgrading the Primary Central Manager
Creating a Backup of the Primary Central Manager
This procedure describes how to back up the Primary Central Manager database and copy the backup file to an FTP server.
Procedure
Step 1 Telnet to the primary CM.
Step 2 Create the database backup.
Step 3 Copy the backup file to a remote FTP server.
copy disk ftp ftpserver / waas-db-filename.dump remote_filename
Step 4 Verify that the backup file copied correctly by checking the file for correct size and timestamp.
Upgrading the Standby Central Manager
This procedure describes how to upgrade the WAAS software on the Standby Central Manager.
Procedure
Step 1 Telnet to the Standby CM IP address.
telnet standby_cm_ip_address
Step 2 Copy the new software image to the Standby CM.
copy ftp install ftpserver / WAAS_4.1.x-K9.bin
This example assumes that the file is in the root directory of the FTP server. Provide the correct path if needed.
Step 3 Reload the Standby CM.
Step 4 Verify that the new image loaded correctly.
Step 5 Ping the Primary CM and branch WAE devices to confirm connectivity.
Step 6 Wait at least 5 minutes and then confirm the database last synchronization time to ensure that the database has been synchronized.
Step 7 From the Primary CM, confirm that the status indicator for the Secondary CM is online and green.
Upgrading the Primary Central Manager
This section describes how to upgrade the WAAS software on the Primary Central Manager.
Prerequisites
Upgrade the secondary Central Manager before you upgrade the Primary Central Manager (see the "Upgrading the Standby Central Manager" section).
Procedure
Step 1 Telnet to the Primary CM IP address.
telnet primary_cm_ip_address
Step 2 Copy the new software image to the Primary CM.
copy ftp install ftpserver / WAAS_4.1.x-K9.bin
This example assumes that the file is in the root directory of the FTP server. Provide the correct path if needed.
Step 3 Reload the Primary CM.
Step 4 Verify that the new image loaded correctly.
Step 5 Ping the Standby CM and branch WAE devices to confirm connectivity.
Step 6 Confirm that the CMS services are running.
Step 7 Modify the CM configurations as follows:
a. Choose My WAN > Manage Device Groups > AllDevicesGroup > Configure > Enabled Features and uncheck the following Accelerator check boxes: CIFS, Video, MAPI, NFS, HTTP, SSL, and EPM (application accelerators are enabled depending upon licenses purchased). CIFS continue to run in Legacy Mode (if the CIFS feature was active before upgrade) and are migrated to the CIFS accelerator depending upon the chosen upgrade path (see the "Migrating from CIFS Legacy Mode to CIFS Accelerator Mode" section).
Note Check marks remain in the TFO, DRE and Persistent Compression check boxes only.
b. Verify that any policy changes are applied through the AllDevicesGroup.
c. Choose Manage Devices > Device > Configure > Enabled Features to confirm that the above features have been disabled on each WAE.
d. Verify that all the WAE devices are online (green) and are in the AllDevices Group.
Checkpoint
The CMs are updated with the new WAAS software version 4.1.x. The Secondary CM was upgraded first followed by the Primary CM.
Upgrading the Branch WAAS Software
This section describes how to upgrade each WAAS branch WAE to version 4.1.x.
Note After the upgrade to software version 4.1.x, all branch WAE devices continue to run with legacy mode CIFS until they are converted to CIFS accelerator mode.
Prerequisites
The prerequisites for upgrading are as follows:
•Upgrade the Secondary and Primary CMs before upgrading the branches (see the "Upgrading the Central Manager WAAS Software" section).
•Copy the WAAS software image to a local server (using FTP) for use during the upgrade or push the software image to WAE devices through the CM. See the Cisco Wide Area Application Services Configuration Guide chapter named "Maintaining Your WAAS System."
This section includes the following topics:
•Preparing to Upgrade the Branch WAE
•Upgrading the Branch WAE Software
Preparing to Upgrade the Branch WAE
This section describes the tasks that we recommend that you perform before you upgrade the branch WAE devices.
This section includes the following topics:
•Checking the Health of the WAE devices
•Displaying and Saving Device Information
Checking the Health of the WAE devices
This section describes how to check the health of the WAE devices before performing an upgrade.
Procedure
Step 1 Access the CM GUI.
https://cm_ip_address:8443
Step 2 Verify that all the WAE devices are online (green).
Step 3 Address any alarm conditions that may exist.
Displaying and Saving Device Information
This section describes the device information that you should capture and save to a remote server before upgrading the WAE. Perform the following procedure on each device.
Procedure
Step 1 Copy the system report to an FTP server.
copy sysreport ftp host / wae-sysreport
Step 2 Copy the running configuration to an FTP server.
copy running-config ftp host wae-running-config
Step 3 Copy the technical support report to an FTP server.
copy tech-support ftp host wae-tech-support
Step 4 Save the configuration.
Upgrading the Branch WAE Software
This procedure shows how to upgrade the branch WAE software.
Procedure
Step 1 Open a console or telnet session to the branch WAE.
Step 2 Copy the software image to the WAE.
copy ftp install ftpserver / WAAS_4.1.x-K9.bin
This example assumes that the file is in the root directory of the FTP server. Provide the correct path if needed.
Step 3 Reload the WAE.
Step 4 Verify that the image installed correctly.
Step 5 Verify that the correct licenses are installed.
If an Enterprise license has been purchased and not enabled, go to Steps 6 and 7. Otherwise, go to Step 8.
Step 6 (Optional) Clear the Transport license.
Step 7 (Optional) Add the Enterprise license.
Step 8 Write the information to memory.
Step 9 From the WAAS CM GUI, choose My WAN > Devices > branchWAE and verify that the WAE is online (green).
Step 10 From the WAAS CM GUI, verify that CIFS legacy mode (if you are using CIFS) is still enabled as follows:
a. Choose My WAN > Devices > branchWAE > Configure > Legacy Services > WAFS Edge Configuration and make sure that the Enable Edge Services check box is still checked. If you were also running core services in the branch, confirm that it is also enabled.
b. Choose My WAN > Devices > branchWAE > Configure > Enabled Features and uncheck the following Accelerator check boxes: CIFS, Video, MAPI, NFS, HTTP, SSL, and EPM.
These features require licenses to be purchased in order to enable them.
Note Check marks should remain in the TFO, DRE, and Persistent Compression check boxes only.
Step 11 Verify the WAE device functionality as follows:
a. Assuming that WCCP is used for the traffic interception method, verify the WCCP is functioning properly.
b. Confirm that a port 4050 tunnel exists and flows are being optimized.
show statistics connections
c. Confirm that the Enterprise license is enabled.
If the Enterprise license is not enabled, proceed with Steps d through f.
d. Clear the Transport license.
e. Add the Enterprise license.
f. Save the changed configuration.
Checkpoint
All the branch WAE devices within the active WAAS network are upgraded to release 4.1.x and running in CIFS legacy mode.
Upgrading the Data Center WAAS Software
This section describes how to prepare for and upgrade the data center WAAS Software. The data center WAE devices will be upgraded to 4.1.x but will continue running CIFS legacy mode. The conversion to CIFS accelerator mode is done in a later step depending on the chosen upgrade path. For information about the options to upgrade to the CIFS Accelerator, see the "Migrating from CIFS Legacy Mode to CIFS Accelerator Mode" section.
This section includes the following topics:
•Preparing to Upgrade Data Center WAAS Software
•Upgrading the Data Center WAE
Preparing to Upgrade Data Center WAAS Software
This procedure shows how to prepare for upgrading the data center WAE devices.
Procedure
Step 1 Access the primary Central Manager GUI.
https://cm_ip_address:8443
Step 2 Verify that all the WAE devices are online (green).
Step 3 Address any alarm conditions that may exist.
Upgrading the Data Center WAE
This procedure shows how to upgrade the data center WAE software.
Note For a graceful termination of existing TCP flows optimized by WAAS, we recommend that you disable WCCP on the WAE first, as described in Step 1 of this procedure. Then wait until the graceful timer counts down, during which period no new connections are redirected to the WAE and the existing connections are allowed to gracefully terminate. Upon completion of the countdown timer, all existing connections are terminated.
Procedure
Step 1 Disable WCCP on the WAE as follows to allow a graceful termination of existing TCP flows that are optimized by WAAS:
a. Disable WCCP.
b. Wait until the countdown expires or press Ctrl + C to skip waiting for graceful WCCP shutdown.
c. Verify that WCCP is disabled.
d. Save the changed configuration.
Step 2 Disable WCCP on the intercepting router/switch.
Step 3 Verify that WCCP is disabled.
Step 4 Upgrade the data center WAE software as follows:
a. Open a console or telnet session to the data center WAE.
b. Copy the software image to the WAE.
copy ftp install ftpserver / WAAS_4.1.x-K9.bin
This example assumes that the file is in the root directory of the FTP server. Provide the correct path if needed.
c. Reload the WAE.
d. Verify that the image installed correctly.
e. Confirm that WCCP is disabled.
f. Save the changed configuration.
Step 5 From the WAAS CM GUI, choose My WAN > Devices > dataCenterWAE and verify that the WAE is online (green).
Step 6 From the WAAS CM GUI, verify that CIFS legacy mode (if you are using CIFS) is still enabled as follows:
a. Choose My WAN > Devices > dataCenterWAE > Configure > Legacy Services > WAFS Core Configuration and make sure that the Enable Core Server check box is still checked. If you were also running the edge service in the data center, confirm that it is also enabled.
b. Choose My WAN > Devices > dataCenterWAE > Configure > Enabled Features and uncheck the following Accelerator check boxes: CIFS, Video, MAPI, NFS, HTTP, SSL, and EPM.
These features require licenses to be purchased in order to enable them.
Note Check marks should remain in the TFO, DRE, and Persistent Compression check boxes only.
CIFS Accelerator may be enabled depending upon the CIFS upgrade path chosen later in this document (see the "Migrating from CIFS Legacy Mode to CIFS Accelerator Mode" section).
Step 7 Enable WCCP on all intercepting routers/switches in the router list as follows:
a. Telnet to each core router/switch.
b. Enable WCCP.
config t
ip wccp 61 redirect-list ACL_name
ip wccp 62 redirect-list ACL_name
To see an example ACL template, see the "Enabling/Disabling WCCP on WAE Devices in a Cluster" section.
Step 8 Verify WAE device functionality as follows:
a. Enable WCCP.
b. Confirm that redirecting intercepting router IDs are seen.
c. Confirm that all WAE devices in the cluster are seen.
show wccp wide-area-engine
d. Confirm that tunnels on port 4050 exist and that flows are being optimized.
show statistics connections
e. Confirm that the packet count to the WAE is increasing and no loops are detected.
f. Verify that the buckets assigned for Service Group 61 match those of Service Group 62 and are assigned to the WAE.
show wccp flows tcp-promiscuous detail
g. Confirm that other flows are being optimized.
show statistics connections
Checkpoint
All WAE devices in the data center are upgraded to release 4.1.x, are running in CIFS legacy mode, and have WCCP enabled. CIFS traffic is optimized according to the defined connectivity directives.
Migrating from CIFS Legacy Mode to CIFS Accelerator Mode
This section describes how to migrate from CIFS legacy mode to CIFS accelerator mode.
For more detailed information about CIFS migration, see Cisco WAAS Software 4.1 Common Internet File System Migration.
Note The CIFS cache is not lost during migration from CIFS legacy mode to CIFS accelerator mode. Disk allocation for CIFS in release 4.1 also remains similar to its allocation in 4.0.
The two methods for migrating from CIFS legacy mode to CIFS accelerator mode are as follows:
•Disruptive Migration—Enables the CIFS accelerator at the time of upgrade. CIFS legacy mode must first be disabled, at which time the CIFS accelerator can be enabled. This method is disruptive and affects CIFS optimized traffic between the WAE devices on the branch and data center sides until all the sites have the CIFS accelerator enabled. It can be applied to any existing WAAS 4.0.x deployment. This method requires little preplanning, but end users do experience short WAAS and WAAS files service outages; however, it has the advantage of a relatively quick and straightforward execution.
•Graceful Migration—Allows CIFS legacy mode to continue functioning while migrating to the CIFS accelerator. This method is non-disruptive and allows migration without impacting traffic between the WAE devices on the branch or data center sides as the sites are migrated to the CIFS accelerator. This method requires preplanning and systematic execution over a significant period of time, but it has the advantage of nonstop operation of WAAS and WAAS file services.
Note Auto-discovery differs between the CIFS legacy and CIFS accelerator modes. Legacy mode uses CIFS auto-discovery, which is based on selection of the "best" Core device from the configured Cores for each Edge, whereas CIFS accelerator mode uses standard WAAS auto-discovery, which is based on routing and interception. You must verify that the network and the interception are configured properly and an existing stable CIFS environment exists before the migration. The differences between the auto-discovery mechanisms may lead to different Core selections in the accelerator and legacy modes.
This section contains the following topics:
•Migrating Preposition Directives
•Performing a Disruptive Migration
•Performing a Graceful Migration
Migrating Preposition Directives
Regardless of the method that you use to migrate to the CIFS accelerator, you must create new preposition directives. For information about creating preposition directives, see Cisco WAAS Software 4.1 Common Internet File System Migration.
Performing a Disruptive Migration
This procedure shows how to perform a disruptive migration from CIFS legacy mode to CIFS accelerator mode. It is the simplest and easiest method to perform and is recommended if you choose not to use the graceful migration procedure. During the migration, CIFS connections are optimized with TFO/DRE but they are not CIFS accelerated until the WAE devices have been upgraded to release 4.1.x with CIFS accelerator enabled. Existing legacy CIFS connections are closed during the upgrade and the migration. Additionally, it requires several reboots on each WAE device.
Procedure
Step 1 Log in to the primary CM GUI.
https://cm_ip_address:8443
Step 2 Verify that all the WAE devices are online (green).
Step 3 Address any existing alarm conditions before proceeding.
Step 4 From the CM GUI, disable CIFS legacy mode and enable the CIFS accelerator as follows:
a. Choose My WAN > Manage Devices > EdgeWAE > Configure > Legacy Services > WAFS Edge Configuration and uncheck the Enable Edge Service check box.
Note You can also disable the edge service through device groups depending upon the individual network configurations. By default, all WAE devices should be members of the AllDevicesGroup, which can be used to remove edge services.
b. Choose My WAN > Manage Device Groups > Core_Cluster > Delete Cluster to delete the specified core cluster.
c. Choose My WAN > Manage Devices > CoreWAE > Configure > Legacy Services > WAFS Core Configuration and uncheck the Enable Core Server check box.
d. Choose My WAN > Manage Devices > EdgeWAE > Configure > Enabled Features and check the CIFS Accelerator check box.
Note Check marks should now be beside TFO, DRE, Persistent Compression, and CIFS Accelerator. The following Accelerator check boxes should be unchecked (unless the appropriate licenses have been installed): Video, MAPI, NFS, HTTP, SSL, and EPM.
Note You can also enable the CIFS accelerator through device groups depending upon the individual network configurations. By default, all WAE devices should be members of the AllDevicesGroup, which can be used to enable CIFS accelerator.
e. Reload each affected WAE.
Note You can initiate a reload though the CM either individually or through the Device Groups to which the WAE devices belong. If the WAE devices are divided into Device Groups, by default, all the devices are members of the AllDevicesGroup, which you can use to reload all the group devices.
Step 5 Verify proper WAE functionality as follows:
a. Confirm that the redirecting intercepting router IDs are seen.
b. Confirm that all WAE devices in the cluster are seen.
show wccp wide-area-engine
c. Confirm that the packet count to the WAE is increasing and no loops are detected.
d. Verify that the buckets assigned for Service Group 61 match those of Service Group 62 and are assigned to the WAE.
show wccp flows tcp-promiscuous detail
e. Verify that only the CIFS accelerator is enabled.
f. Confirm that other flows are optimized and you see "C" for CIFS optimizations applied (seen only if CIFS traffic is present).
Performing a Graceful Migration
This section describes how to perform a graceful migration from CIFS legacy mode to CIFS accelerator mode. It requires multiple data center WAE devices where half the devices can handle the full traffic load. This migration method might require adding new WAE devices in the data center.
The graceful migration method consists of the following steps:
1. Logically split the existing cluster of Core WAE devices running CIFS legacy mode into two groups.
2. Configure half the WAE devices (or add others) with WCCP and the CIFS accelerator, and remove WCCP from the other half of the existing WAE devices that continue to run CIFS legacy mode.
CIFS traffic is optimized using the CIFS legacy mode data center WAE devices, while all the other TCP connections are optimized using the CIFS accelerator WAE devices.
3. Migrate all the branch sites to the CIFS accelerator.
4. Remove CIFS legacy mode configurations from all remaining data center WAE devices and then enable WCCP and the CIFS accelerator on these devices.
If you added WAE devices for the migration, you can remove them or leave them in place for added capacity.
Data Center Preparation
This section describes how to prepare for the migration in the data center, which can be done without a change window because production traffic is not affected.
This section includes the following topics:
•Preparing New WAE Devices
•Enabling/Disabling WCCP on WAE Devices in a Cluster
•Disabling WCCP on CIFS Legacy WAE and Activating WCCP on CIFS Accelerator WAE
•Migrating Branch WAE Devices from CIFS Legacy Mode to CIFS Accelerator Mode
Preparing New WAE Devices
This procedure shows how to prepare the new WAE devices that will be used in the migration and can remain in the network after the migration is completed.
Prerequisites
Confirm that version 15418 or later firmware is running on the WAE devices (see the "Cisco RAID Controller Firmware Upgrade and Validation" section).
Guidelines and Restrictions
This procedure has the following guidelines and restrictions:
•Do not enable WCCP on the new WAE devices.
•Do not register the new devices with the Central Manager at this time.
Procedure
Step 1 Install the device, burn-in, and specify the basic configuration as follows:
a. Cable, apply power, and burn in for 48 hours.
b. Open a console into the WAE.
c. Configure all network related settings.
d. Test network connectivity.
e. Ping the default gateway.
f. Ping the Primary CM IP address.
g. Ping the Secondary CM IP address (if present).
Step 2 Upgrade the WAAS software as follows:
a. Copy the software image to the device.
copy ftp install ftpserver / WAAS_4.1.x-K9.bin
This example assumes that the file is in the root directory of the FTP server. Provide the correct path if needed.
b. Reload the device.
c. Verify that the software is installed correctly by checking the version number of the installed software.
d. Confirm that WCCP is disabled.
e. Configure other settings as needed.
f. Save changes to the configuration.
Checkpoint
At this point, you should have the new WAE installed with updated firmware and the desired WAAS software release 4.1.x installed with network connectivity. WCCP is not yet configured and this device is not yet registered with the CM.
Note For information about preposition and dynamic shares, see the Release Note for Cisco Wide Area Application Services (Software Version 4.1.5x) or later versions.
Enabling/Disabling WCCP on WAE Devices in a Cluster
This section describes the recommended practice of enabling or disabling WCCP on WAE devices in a cluster.
When enabling WCCP on WAE devices in a cluster, enable WCCP on the intercepting routers/switches first, followed by enabling WCCP on the WAE with the lowest IP address in the cluster, followed by the WAE with the second lowest IP address, and so forth. We recommend bringing up the WAE devices in the cluster within 15 seconds of each other, which ensures proper WCCP bucket distribution.
To disable WCCP, we recommend that you disable WCCP on the intercepting routers/switches first and wait for a graceful shut down to allow existing TCP connections to expire before disabling WCCP on the WAE devices. If a scrub of IOS has been performed, you can proceed with upgrading the WAE devices without disabling WCCP.
The following ACL template is recommended while running WCCP (IOS version and hardware platform permitting). The template must be altered to suit your environment.
ip access-list extended WCCPLIST
remark ** ACL used for WCCP redirect-list **
remark **WAAS WCCP Mgmt ports **
deny tcp any any eq telnet
deny tcp any any eq tacacs
deny tcp any eq telnet any
deny tcp any eq tacacs any
remark ** Allow only explicit traffic **
permit tcp x.x.x.x 0.0.0.255 y.y.y.y 0.0.0.255
permit tcp y.y.y.y 0.0.0.255 x.x.x.x 0.0.0.255
remark ** Deny all other traffic
Disabling WCCP on CIFS Legacy WAE and Activating WCCP on CIFS Accelerator WAE
This procedure shows how to activate WCCP on the CIFS accelerator WAE and disable WCCP on the CIFS legacy WAE.
Guidelines and Restrictions
This procedure has the following guidelines and restrictions:
•When enabling WCCP, we recommend using an ACL to permit interesting traffic to and from sites to be optimized. Otherwise, use a standard ACL template as shown in the "Enabling/Disabling WCCP on WAE Devices in a Cluster" section.
•For CIFS validation, see the "Additional Information—Performing CIFS Validity Testing and Performing a Rollback" section.
•Although WCCP has been removed from the WAE devices at the data center with CIFS legacy mode configured, CIFS continues to work. The connection between the Edge WAE devices and the Core WAE devices in CIFS legacy mode is established through a point-to-point connection that does not involve WCCP. This point-to-point connection is set up during the configuration of connectivity directives.
Procedure
Step 1 Disable WCCP on the existing Core WAE running CIFS legacy mode as follows:
a. Telnet to the Core WAE.
b. Disable WCCP.
c. Verify that WCCP is disabled.
d. Save the configuration change.
Step 2 On the CM, activate the new data center WAE that is running the CIFS accelerator as follows:
a. Log in to the CM.
b. Choose My WAN > Devices > newWAE > Activate.
Step 3 Enable WCCP on all intercepting routers/switches as follows:
a. Telnet to each router/switch.
b. Enable WCCP.
ip wccp 61 redirect-list ACL_name
ip wccp 62 redirect-list ACL_name
Step 4 Enable WCCP on the new WAE that is running the CIFS accelerator as follows:
Note When enabling WCCP on WAE devices in a cluster, enable WCCP on the intercepting router/switch first before enabling it on the WAE with the lowest IP followed by the WAE with the second lowest and so forth (see the "Enabling/Disabling WCCP on WAE Devices in a Cluster" section).
a. Telnet to the WAE.
b. Enable WCCP.
Step 5 On the branch WAE devices, check and verify that the CIFS legacy mode is operating and verify that a port 4050 tunnel exists to the Core WAE that is still running CIFS legacy mode.
show statistic connection
Checkpoint
At this point in the process, you now have two sets of WAE devices in the data center:
•One set is running CIFS legacy mode with WCCP disabled but is still functioning as a Core WAE cluster for CIFS legacy mode.
•The second set has WCCP and the CIFS accelerator enabled and is optimizing all other applications.
CIFS is optimized one way only on connections initiated at the branches to the data center. These connections rely on the configured CIFS connectivity directives. Because WCCP is enabled on the branches only and not at the data center, at the branch site, TCP traffic is redirected to the WAE where the CIFS port 4050 point-to-point tunnel is used to optimize CIFS traffic depending upon the configured connectivity directives.
For connections initiated at the data center, because WCCP is enabled only on the WAE devices running CIFS accelerator mode, CIFS is not optimized unless the paired site is also running the CIFS accelerator.
Migrating Branch WAE Devices from CIFS Legacy Mode to CIFS Accelerator Mode
This procedure shows how to migrate branch WAE devices from CIFS legacy mode to CIFS accelerator mode. Using the Central Manager, you migrate selected sites to the CIFS accelerator by removing the checkmark from the WAFS Edge Configuration page (and also, if configured, from the WAFS Core Configuration page) on the individual branch WAE devices. Then the CIFS accelerator is enabled.
The migration of sites continues until all the branch sites have been successfully migrated to the CIFS accelerator and no branch sites or devices exist with CIFS legacy mode enabled.
Procedure
Step 1 Log in to the primary CM GUI.
https://cm_ip_address:8443
Step 2 Verify that all the WAE devices are online (green).
Step 3 Address any alarm conditions before proceeding.
Step 4 From the CM GUI, disable CIFS legacy mode and enable CIFS accelerator mode as follows:
a. Choose My WAN > Manage Devices > EdgeWAE > Configure > Legacy Services > WAFS Edge Configuration and uncheck the Enable Edge Service check box.
Note You can also disable features through device groups depending on how your WAAS network is designed. The ability to disable device features either individually or as a group allows you to migrate certain sites to CIFS accelerator while other sites continue to optimize CIFS using the legacy mode.
b. Choose My WAN > Manage Device Groups > Core_Cluster > Delete Cluster to delete the selected cluster.
c. Choose My WAN > Manage Devices > EdgeWAE > Configure > Legacy Services > WAFS Core Configuration and uncheck the Enable Core Server check box.
d. Choose My WAN > Manage Devices > EdgeWAE > Configure > Enabled Features and check the CIFS Accelerator check box.
Note Check marks should now be beside TFO, DRE, Persistent Compression, and CIFS Accelerator. The following Accelerator check boxes should be unchecked (unless the appropriate licenses have been installed): Video, MAPI, NFS, HTTP, SSL, and EPM.
Note You can also enable features through device groups depending on how your WAAS network is designed. The ability to enable device features either individually or as a group allows you to migrate certain sites to CIFS accelerator while other sites continue to optimize CIFS using the legacy mode.
e. Reload the device.
Caution
Reload is a disruptive process. Any existing connections through the WAE are terminated. When the WAE returns to an online state, new connections are optimized but existing connections established during the reload continue unoptimized until the connection is reestablished.
Step 5 Verify device functionality as follows:
a. Verify that only the CIFS accelerator is enabled.
b. Verify that the connections are being optimized.
show statistic connection
c. Confirm that the packet count to the WAE is increasing and no loops are detected.
d. Confirm that redirecting intercepting router IDs are seen.
e. Confirm that all the WAE devices in the cluster are seen.
show wccp wide-area-engine
f. Verify that the buckets assigned for Service Group 61 match those of Service Group 62 and are assigned to the WAE.
show wccp flows tcp-promiscuous detail
g. Confirm that the other flows are being optimized.
show statistic connections
Checkpoint
At this point, you should have all WAE devices running the CIFS accelerator except for half of the data center WAE devices.
Removing CIFS Legacy Configurations from Data Center WAE Devices
This procedure shows how to remove CIFS legacy configurations from data center WAE devices and enable both CIFS accelerator and WCCP so that the devices can rejoin as members of the CIFS accelerator farm.
Prerequisites
Confirm that you have migrated all the branch sites to the CIFS accelerator and that no branch device on the network is running CIFS legacy mode.
Procedure
Step 1 Log in to the primary CM GUI.
https://cm_ip_address:8443
Step 2 Verify that all the WAE devices are online (green).
Step 3 Address any alarm conditions before proceeding.
Step 4 Disable WCCP on the routers/switch.
Caution
Disabling WCCP on the routers/switch is a disruptive process. Any existing connections through this WAE are terminated. When the WAE returns to an online state, new connections are optimized but existing connections established during the reload continue unoptimized until the connection is reestablished.
Step 5 From the CM GUI, disable CIFS legacy mode and enable CIFS accelerator mode as follows:
a. Choose My WAN > Manage Devices > CoreWAE > Configure > Legacy Services > WAFS Edge Configuration and uncheck the Enable Edge Server check box.
b. Choose My WAN > Manage Device Groups > Core_Cluster > Delete Cluster to delete the selected cluster.
c. Choose My WAN > Manage Devices > CoreWAE > Configure > Legacy Services > WAFS Core Configuration and uncheck the Enable Core Server check box.
d. Choose My WAN > Manage Devices > CoreWAE > Configure > Enabled Features and check the CIFS Accelerator check box.
Note Check marks should now be beside TFO, DRE, Persistent Compression, and CIFS Accelerator. The following Accelerator check boxes should be unchecked (unless the appropriate licenses have been installed): Video, MAPI, NFS, HTTP, SSL, and EPM.
e. Reload the device.
Step 6 Enable WCCP on the remaining data center WAE devices as follows:
a. Telnet to each WAE.
b. Enable WCCP.
c. Save the changed configuration.
Step 7 Enable WCCP on all of the intercepting routers/switches that are in the router list as follows:
a. Telnet to each router/switch.
b. Enable WCCP.
ip wccp 61 redirect-list ACL_name
ip wccp 62 redirect-list ACL_name
Step 8 Confirm WCCP functionality on the WAE as follows:
a. Confirm that WCCP is running.
b. Verify that connections are being optimized.
show statistic connection
c. Confirm packet count to the WAE is increasing and no loops are detected.
d. Confirm that redirecting intercepting router IDs are seen.
e. Confirm that all WAE devices in the cluster are seen.
show wccp wide-area-engine
f. Verify that the buckets assigned for Service Group 61 match those of Service Group 62 and are assigned to the WAE.
show wccp flows tcp-promiscuous detail
g. Confirm that the other flows are being optimized.
show statistic connections
Checkpoint
All WAE devices are running the CIFS accelerator and none are running in CIFS legacy mode.
Additional Information—CM Downgrade and Database Rollback
This section describes how to create a backup of the CM database, which you must do both before and after an upgrade, and how to roll back to a previous version of the database should you encounter a problem during the upgrade.
This section includes the following topics:
•Backing Up the CM Database
•Restoring the CM Databases
•Downgrading to a Previous Version
Backing Up the CM Database
This procedure shows how to how to back up the databases of the Primary and Standby CMs.
Procedure
Step 1 From the Primary CM, create a backup of the database.
Step 2 Copy the Primary CM backup file to a remote location.
copy disk ftp ftp_ip_address remote_directory remote_file_name local_file_name
Step 3 From the Standby CM, create a backup of the database.
Step 4 Copy the Standby CM backup file to a remote location.
copy disk ftp ftp_ip_address remote_directory remote_file-name local_file_name
Restoring the CM Databases
This section describes how to restore the databases on the Primary and Standby CMs using their database backup files (see the "Backing Up the CM Database" section).
Guidelines and Restrictions
Use the following guidelines to restoring the CM databases:
•When restoring the CM database, ensure that the CM is using the same software version as when the database backup file was created.
•Restore the Standby CM first and then restore the Primary CM.
This section includes the following topics:
•Restoring the Standby CM Database
•Restoring the Primary CM Database
Restoring the Standby CM Database
This procedure shows how to restore the Standby CM database.
Procedure
Step 1 From the Standby CM, disable the CMS service.
Step 2 Delete the existing CMS database.
Step 3 Restore the CMS database contents from the backup file.
cms database restore bkup_file_name
Step 4 Enable the CMS service.
Step 5 Verify that the CMS services are running and that the database has synchronized.
Wait at least 5 minutes and then confirm that the database last synchronization time is current. If the time is not current, wait another 5 minutes.
Step 6 Check the current date and time on the Standby CM.
Step 7 Verify the CMS status in the running configuration.
show running-config | include cms
Restoring the Primary CM Database
This procedure shows how to restore the Primary CM Database.
Prerequisites
Restore the Standby CM database before you restore the Primary CM database (see the "Restoring the Standby CM Database" section).
Procedure
Step 1 From the Primary CM, disable the CMS service.
Note Stopping the CMS service disables the CM GUI. All users logged in to this GUI are logged out when the CMS service is disabled.
Step 2 Delete the existing CMS database.
Step 3 Restore the CMS database contents from the backup file.
cms database restore bkup_file_name
Step 4 Enable the CMS service.
Step 5 Verify that the CMS services are running.
Step 6 Check the current date and time on the Standby CM.
Step 7 Confirm that you see "Ready to accept incoming RPC requests" in the log file (errorlog/cms_log.current), which indicates that the WAE is ready to establish connections with the Central Manager.
Look for the timestamp from the output and compare it with current time.
Step 8 Verify the CMS status in the running configuration.
show running-config | include cms
Step 9 Access the CM GUI from a browser.
Downgrading to a Previous Version
For the most current information about how to downgrade to a previous version, see the Release Note for Cisco Wide Area Application Services.
Additional Information—Registering an Upgraded WAE with the CM
This procedure shows how to register an upgraded WAE if after the upgrade, you cannot see the WAE from the CM.
Procedure
Step 1 From the CM, delete the branch WAE.
Step 2 From the branch WAE, enter the following commands:
Step 3 From the CM, activate the branch WAE. Choose My WAN > Devices > branchWAE > Activate.
Additional Information—Performing a Branch WAE Software Downgrade
This procedure describes how to install a previous version of software on a branch WAE should you encounter a problem during the upgrade.
Procedure
Step 1 Determine the previously installed version.
Step 2 Install the previous WAAS software version as follows:
a. Telnet to the branch WAE.
b. Install the previous version software image.
copy ftp install ftpserver / WAAS_4.0.x-K9.bin (enter the previous release number)
Step 3 Reload the branch WAE.
Step 4 Verify that the software image installed correctly.
Additional Information—Performing WCCP Validity Testing
This section lists the commands that you can use for WCCP validity testing.
Enter the commands 3 to 4 times in succession to determine if counters are incrementing.
The commands are as follows:
•WAE commands:
–show clock detail
–show wccp gre
–show wccp router
–show wccp wide-area-engine
–show wccp flows tcp-promiscuous detail
•Router/switch commands (for each service group, where applicable):
–show ip wccp
–show ip wccp service service
–show ip wccp service detail
–show ip wccp service internal (available in most recent releases only)
–show ip wccp interface detail (available in most recent releases only)
•Router/switch commands (when hashing is used):
–show tcam counts
–show mls stat
–show mls netflow table detail
–show mls netflow ip count
–show mls netflow ip sw-installed count
–show mls netflow ip sw-installed detail
–show fm interface interface_name
•Router/switch commands (when masking is used):
–show ip wccp service mask
–show ip wccp service merge
–show tcam interface interface name acl {in | out} ip
–show tcam interface interface name acl {in | out} ip detail
For possible IOS issues, capture the following debug output to either the console or a telnet session:
•debug ip wccp events
•debug ip wccp packets
Additional Information—Performing CIFS Validity Testing and Performing a Rollback
This section describes the methods that you can use for CIFS validity testing, which includes manual procedures and automation tools.
Guidelines and Restrictions
Use the following guidelines when performing CIFS validity testing and performing a rollback:
•Choose a single file or a variety of files for the test. You must use the same file or files for all the tests (base, cold, hot).
•Use an existing share or create a directory structure on the file server. Verify that the share has permissions set for Domain Users. We recommend testing or creating a share that has multiple nested directories (at least 2 to 3 levels deep) that contain files of various types (such as PowerPoint, Excel, or Word) and sizes.
This section includes the following topics:
•Preparing the Shared Server and Client for CIFS Validity Testing
•Performing a Manual CIFS Performance Test with WAAS
•Evaluating the Manual Test Results
•Rolling Back from CIFS Accelerator Mode to CIFS Legacy Mode
Preparing the Shared Server and Client for CIFS Validity Testing
This procedure shows how to prepare the shared server and client for CIFS validity testing.
Procedure
Step 1 On the server, create a share directory that contains several subfolders and files.
Step 2 Verify the following items on the shared server:
•Adequate permissions for Domain Users used in the testing.
•Domain users can access the share before testing WAAS.
•SMB signing (digital signature) is disabled on the server.
Step 3 Verify the following items on the client:
•PC clients are part of the tested Domain environment.
•Domain user exists for each of the PC clients.
•Tested shares do not rely on local user and groups but rather have permissions for Domain Users and groups.
•Microsoft Office (Word, Excel, PowerPoint) is installed.
Performing a Manual CIFS Performance Test with WAAS
This procedure shows how to manually perform a CIFS performance test.
Procedure
Step 1 Verify operation by opening some Microsoft Office documents from the shared server.
Record the filename, size, and open time.
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Step 2 Modify the files by adding some text and saving.
Record the time it takes to save.
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Step 3 Open the files again to inspect response time and data integrity.
Record the time it took to open them and get to the spot where your changes were made.
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Step 4 Evaluate the results of the testing (see the "Evaluating the Manual Test Results" section).
Evaluating the Manual Test Results
This section describes the expected results of the manual CIFS performance test (see the "Performing a Manual CIFS Performance Test with WAAS" section).
The test should show tremendous improvement in the time to open and time to save operations. The same behavior should also be observed with the modified file.
The Central Manager provides real time statistics and a summary report for CIFS connections (My WAN > Manage Devices > branchWAE > Monitor > Acceleration > CIFS Acceleration Report).
shows some of the CIFS charts.
Figure 1 CIFS Acceleration Report
From the CLI, the following information appears:
WAE674# show statistics connection optimized
Current Active Optimized Flows: 1
Current Active Optimized TCP Plus Flows: 1
Current Active Optimized TCP Only Flows: 0
Current Active Optimized TCP Preposition Flows: 0
Current Active Auto-Discovery Flows: 0
Current Active Pass-Through Flows: 0
D:DRE,L:LZ,T:TCP Optimization,
A:AcceleratorIM,C:CIFS,E:EPM,G:GENERIC,H:HTTP,M:MAPI,N:NFS,S:SSL,V:VIDEO
ConnID Source IP:Port Dest IP:Port PeerID Accel
214682 2.8.35.100:2122 2.8.1.200:445 00:23:7d:06:6e:08 TCDL
To display detailed information about any CIFS connection, enter the show statistics connection optimized cifs detail command.
To display overall CIFS accelerator statistics, use the show statistics accelerator cifs detail command as follows:
WAE674# show statistics accelerator cifs detail
Time Accelerator was started: Sun May 17
Time Statistics were Last Reset/Cleared: Sun May 17
Total Handled Connections: 10565
Total Optimized Connections: 0
Total Connections Handed-off with Compression Policies Unchanged: 0
Total Dropped Connections: 0
Current Active Connections: 0
Current Pending Connections: 0
Maximum Active Connections: 5
Number of local reply generating requests: 13266
Number of remote reply generating requests: 13266
The Average time to generate a local reply (msec): 0
Average time to receive remote reply (ms): 1
Rolling Back from CIFS Accelerator Mode to CIFS Legacy Mode
This procedure shows how to roll back from CIFS accelerator mode to CIFS legacy mode if a failure occurs when upgrading to CIFS accelerator mode or CIFS is not optimized. CIFS accelerator mode can be rolled back to CIFS legacy mode by reenabling the CIFS Edge Services on the WAE devices and recreating the connectivity directive for the particular branch.
Procedure
Step 1 Perform the following tasks on the edge WAE devices:
a. Choose My WAN > Manage Devices > EdgeWAE > Configure > Acceleration > Enabled Features and uncheck the CIFS Accelerator check box.
b. Choose My WAN > Manage Devices > EdgeWAE > Configure > Acceleration > Legacy Services > WAFS Edge Configuration > Enable Edge Services.
c. Reload the device.
d. Choose My WAN > Connectivity > Select Connectivity Directive and add the Edge device.
Step 2 Perform the following tasks on the core WAE devices:
a. Choose My WAN > Manage Devices > CoreWAE > Configure > Acceleration > Enabled Features and uncheck the CIFS Accelerator check box.
b. Choose My WAN > Manage Devices > CoreWAE > Configure > Acceleration > Legacy Services > WAFS Core Configuration, check the Enable Core Server check box, and either choose an existing core cluster or create a new one.
c. Reload the device.
Step 3 Recreate connectivity directives as follows:
a. Choose MY WAN > Configure > Legacy Services > Connectivity.
b. Create a Connectivity Directive.
c. Add appropriate Edge devices to the selected core cluster.
Related Documentation
For additional information on the Cisco WAAS software, see the following documentation:
•Release Note for Cisco Wide Area Application Services
•Cisco Wide Area Application Services Command Reference
•Cisco Wide Area Application Services Quick Configuration Guide
•Cisco Wide Area Application Services Configuration Guide
•Cisco Wide Area Application Services API Reference
•Cisco WAAS Installation and Configuration Guide for Windows on a Virtual Blade
•Configuring Cisco WAAS Network Modules for Cisco Access Routers
•Cisco Wide Area Application Services Online Help
•Using the Print Utilities to Troubleshoot and Fix Samba Driver Installation Problems
•Regulatory Compliance and Safety Information for the Cisco Wide Area Virtualization Engines
•Cisco Wide Area Virtualization Engine 274 and 474 Hardware Installation Guide
•Cisco Wide Area Virtualization Engine 574 Hardware Installation Guide
•Regulatory Compliance and Safety Information for the Cisco Content Networking Product Series
•Cisco Wide Area Application Engine 512 and 612 Hardware Installation Guide
•Cisco Wide Area Application Engine 7326 Hardware Installation Guide
•Cisco Wide Area Application Engine 7341, 7371, and 674 Hardware Installation Guide
•Installing the Cisco WAE Inline Network Adapter
•WAAS Enhanced Network Modules
Obtaining Documentation, Obtaining Support, and Security Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.
© 2010 Cisco Systems, Inc. All rights reserved.
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