WCCP--Fast Timers
The Web Cache Communication Protocol (WCCP)--Fast Timers feature enables WCCP to establish redirection using a configurable message interval when a WCCP client is added to a service group or when a WCCP client fails.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Information About WCCP--Fast Timers
WCCP--Fast Timers Overview
The WCCP--Fast Timers feature enables WCCP to establish redirection using a configurable message interval when a WCCP client is added to a service group or when a WCCP client fails. WCCP routers and WCCP clients exchange keepalive messages at a fixed interval. Prior to the introduction of the WCCP--Fast Timers feature, the WCCP message interval was fixed at 10 seconds. The WCCP--Fast Timers feature enables use of message intervals ranging from 0.5 seconds to 60 seconds and a timeout value scaling factor of 1 to 5. The default is 10 seconds. The timer interval is driven by the WCCP client which is being redirected to. The WCCP clients must support variable message interval timers in order for the WCCP--Fast Timers feature to function correctly.
The WCCP message interval capability introduced by the WCCP--Fast Timers feature defines the transmission interval that WCCP clients and WCCP routers use when sending keepalive messages and defines a scaling factor used when calculating the timeout value. The WCCP router uses the timeout value to determine if a WCCP client is no longer available and to redirect traffic as a result. The WCCP router enforces a single message interval per service group. WCCP clients with incompatible message intervals are prevented from joining a service group. If a default message interval that is smaller than the default 10 seconds is used, CPU usage will increase.
You can use the show ip wccp service service-number detail command to display information about the message interval.
How to Configure WCCP--Fast Timers
Displaying WCCP--Fast Timers Information
DETAILED STEPS
Configuration Examples for WCCP--Fast Timers
Example: Displaying WCCP-Fast Timers Information
The following example displays WCCP client information that includes the message interval information:
Device# show ip wccp 91 detail WCCP Client information: WCCP Client ID: 10.1.1.14 Protocol Version: 2.0 State: Usable Redirection: GRE Packet Return: GRE Assignment: MASK Message Interval: 2.500 seconds (2.354 since last message) Client timeout: 15 seconds Assignment timeout: 25 seconds Packets Redirected: 0 Connect Time: 00:01:56 Bypassed Packets Process: 0 CEF: 0
Additional References
Related Documents
| Related Topic | Document Title |
|---|---|
| Cisco IOS commands |
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| IP addressing and services commands and configuration tasks |
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| WCCP commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples |
Cisco IOS IP Application Services Command Reference |
Technical Assistance
| Description | Link |
|---|---|
| The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for WCCP--Fast Timers
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
| Table 1 | Feature Information for WCCP--Fast Timers |
| Feature Name | Releases | Feature Information |
|---|---|---|
| WCCP--Fast Timers |
15.1(1)SG 15.2(3)T Cisco IOS XE Release 3.3SG |
The Web Cache Communication Protocol (WCCP)--Fast Timers feature enables WCCP to establish redirection using a configurable message interval when a WCCP client is added to a service group or when a WCCP client fails. The WCCP message interval capability introduced by the WCCP-Fast Timers feature defines the transmission interval that WCCP clients and WCCP routers use when sending keepalive messages and defines a scaling factor used when calculating the timeout value. The WCCP router uses the timeout value to determine if a WCCP client is no longer available and to redirect traffic as a result. The following command were modified: show ip wccp. |
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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.
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