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When to use "Ip wccp check services all"

hello guys,

I was studying WCCP and i saw this command but i am confused about its use.

According to DOCCD

http://www.cisco.com/en/US/docs/ios/ipapp/command/reference/iap_i2.html#wp1088737

"If no WCCP services are configured with a redirect ACL, the services are considered in priority order until a service is found which matches the IP packet. If no services match the packet, the packet is not redirected. If a service matches the packet and the service has a redirect ACL configured, then the IP packet will be checked against the ACL. If the packet is rejected by the ACL, the packet will not be passed down to lower priority services unless the ip wccp check services all command is configured. When the ip wccp check services all command is configured, WCCP will continue to attempt to match the packet against any remaining lower priority services configured on the interface.

If no WCCP services are configured with a redirect ACL, the services are considered in priority order until a service is found which matches the IP packet. If no services match the packet, the packet is not redirected. If a service matches the packet and the service has a redirect ACL configured, then the IP packet will be checked against the ACL. If the packet is rejected by the ACL, the packet will not be passed down to lower priority services unless the ip wccp check services all command is configured. When the ip wccp check services all command is configured, WCCP will continue to attempt to match the packet against any remaining lower priority services configured on the interface."

My understanding is that i only have to configure this command when i have more than one service in the same direction and in the same interface.

Example,

ip wccp 61 redirect-list 100

ip wccp 70 redirect-list 101

int fa0/0

ip wccp 61 redirect in

ip wccp 70 redirect in

---> Example below i would NOT need to use the ip wccp check services all, command:

ip wccp 61 redirect-list 100

ip wccp 62 redirect-list 101

int fa0/0

ip wccp 61 redirect in

ip wccp 62 redirect out

am i correct ?

I appreciate the help !

see ya

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