HP Network Direr Software Products manual Limitations Webcache Redirection and VLANs

880Appendix E: REPORT EXAMPLES

Limitations Webcache Redirection and VLANs

The Webcache Redirection facility on the Switch 4924 will work on any VLAN. However, the Webcache Redirection feature on the Switch 4400 only works on the default VLAN.

Redirection on the Cache Port (49XX)

When Webcache Redirection is enabled on the Switch 4924, there will be no redirection of traffic from the cache port. The diagram below illustrates this.

Since no web traffic from the cache port of the 49XX will be redirected to the Webcache (Bullseye), then any web traffic generated by Snoopy will not be redirected.

Webcache Software Releases

Version 1.0 of the Webcache agent supports only two caching modes

■proxyMode(1)

■transparentMode(2)

however, subsequent agent releases support a third caching mode

■transparentInlineMode(3)

To ensure the Webcache Redirection feature operates alongside these subsequent agent releases without error, no Webcache Redirection Misconfigurations and Optimizations reports will be generated if the Webcache is operating in this new third mode.

Restarting Webcache Traffic Server

Once the Webcache mode has been changed it is necessary to shutdown and restart the Traffic Server process running on the Webcache. This is performed as part of the ëEnable Webcache Redirectioní hyperlink and as part of the ëChange mode to transparentí hyperlink, however the shutdown and restart of this process takes approximately 20 seconds to complete. Therefore 3Com Network Director does not wait for successful completion of this stage before responding to the client.