- Configuring Enhanced Object Tracking
- Configuring IP Services
- Configuring IPv4 Broadcast Packet Handling
- Configuring TCP
- Configuring UDP Forwarding Support for IP Redundancy Virtual Router Groups
- Configuring WCCP
- Object Tracking: IPv6 Route Tracking
- IPv6 Static Route Support for Object Tracking
- Stream Control Transmission Protocol
- WCCP—Configurable Router ID
- WCCP—Fast Timers
- WCCPv2—IPv6 Support
Contents
- WCCP—Fast Timers
- Finding Feature Information
- Information About WCCP—Fast Timers
- WCCP—Fast Timers Overview
- How to Configure WCCP—Fast Timers
- Displaying WCCP—Fast Timers Information
- Configuration Examples for WCCP—Fast Timers
- Example: Displaying WCCP-Fast Timers Information
- Additional References
- Feature Information for WCCP—Fast Timers
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
- Information About WCCP—Fast Timers
- How to Configure WCCP—Fast Timers
- Configuration Examples for WCCP—Fast Timers
- Additional References
- Feature Information for WCCP—Fast Timers
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and 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 module.
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
1.
enable
2.
show
ip
wccp
[[service-number][detail]]
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 |
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Cisco IOS commands |
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IP application services commands |
Standards and RFCs
Standard |
Title |
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RFC 1256 |
Technical Assistance
Description |
Link |
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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.
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. |