Troubleshooting guide

1-6
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Application Acceleration
Enabling and Disabling the Global Optimization Features
Step 11 If you check the ICA Accelerator check box, you can click the Advanced Settings link as a shortcut to
the ICA Acceleration Configuration window. For more information, see the “Configuring ICA
Acceleration” section on page 1-27.
Step 12 In the Advanced Settings area, uncheck the Blacklist Operation feature if you want to disable it. This
feature allows a WAE to better handle situations in which TCP setup packets that have options are
blocked or not returned to the WAE device. This behavior can result from network devices (such as
firewalls) that block TCP setup packets that have options, and from asymmetric routes. The WAE can
keep track of origin servers (such as those behind firewalls) that cannot receive optioned TCP packets
and learns not to send out TCP packets with options to these blacklisted servers. WAAS is still able to
accelerate traffic between branch and data center WAEs in situations where optioned TCP packets are
dropped. We recommend leaving this feature enabled.
Step 13 If you want to change the default Blacklist Server Address Hold Time of 60 minutes, enter the new time
in minutes in the Blacklist Server Address Hold Time field. The valid range is 1 minute to 10080 minutes
(1 week).
When a server IP address is added to the blacklist, it remains there for configured hold time. After that
time, subsequent connection attempts will again include TCP options so that the WAE can redetermine
if the server can receive them. It is useful to retry sending TCP options periodically because network
packet loss may cause a server to be erroneously blacklisted.
You can shorten or lengthen the blacklist time by changing the Blacklist Server Address Hold Time field.
Step 14 Click Submit.
The changes are saved to the device or device group.
To configure TFO optimization, DRE, and persistent compression from the CLI, use the tfo optimize
global configuration command.
To configure EPM acceleration from the CLI, use the accelerator epm global configuration command.
To configure HTTP acceleration from the CLI, use the accelerator http global configuration command.
To configure NFS acceleration from the CLI, use the accelerator nfs global configuration command.
To configure MAPI acceleration from the CLI, use the accelerator mapi global configuration command.
To configure video acceleration from the CLI, use the accelerator video global configuration command.
To configure SSL acceleration from the CLI, use the accelerator ssl global configuration command.
To configure CIFS acceleration from the CLI, use the accelerator cifs and accelerator cifs preposition
global configuration commands.
To configure Windows print acceleration from the CLI, use the accelerator windows-print global
configuration command.
To configure SMB acceleration from the CLI, use the accelerator smb global configuration command.
To configure ICA acceleration from the CLI, use the accelerator ica global configuration command.
To configure the Blacklist Operation feature from the CLI, use the tfo auto-discovery global
configuration command.
To display status and statistics on the application accelerators from the CLI, use the show accelerator
and show statistics accelerator EXEC commands. To display statistics on the Windows print
accelerator, use the show statistics windows-print requests EXEC command.
For details on configuring individual application accelerators, see the following sections:
• Configuring HTTP Acceleration, page 1-7