Configure WCCP on a 4510 switch

[mburguk1000]

I have to configure an instance of a WCCP on a 4510 switch and I have to admit  have read the examples given by Cisco but dont have understanding of the example config

Router(config)#

ip wccp web-cache group-address 224.1.1.100 password alaska1

I have attached the config in question above and could someone please clarify what the group address  224.1.1.100 is ?

Many Thanks

Mark

[Jon Marshall]

Mark

The multicast address is used when you have multiple routers/L3 switches using the same service group. So instead of the cache engines having to send protocol messages to each router you can use a multicast address instead.

It is optional and you don't necessarily need to use it if you only have on L3 device actually responsible for WCCP.

Jon

[mburguk1000]

Hi Jon thanks for the prompt reply but Im still a bit unsure of what syntax I would use to get this working ?

Thanks

Mark

[Jon Marshall]

Mark

Is it just for http ie port 80 traffic or other traffic as well ?

Jon

[Jon Marshall]

Mark

In addtion where are the clients in relation to the proxy eg. which vlan(s) etc.

Jon

[mburguk1000]

It is for HTTP and HTTPs and the clients are on a Layer 3 Vlan if that helps

Thanks

Mark

[Jon Marshall]

Mark

web-cache is for http only. You could use this and then use a service group for https but it might be easier to simply use a service group for both so -

client vlan = vlan 10 = 192.168.5.0/24

4500 config

=========

ip wccp redirect list 101 password

int vlan 10

ip wccp redirect in

access-list 101 permit tcp 192.168.5.0 0.0.0.255 any eq http

access-list 101 permit tcp 192.168.5.0 0.0.0.255 any eq https

note if you use a password then obviously this needs to be configured on the proxy as well.

The above assumes the proxy is not in vlan 10.

Jon

[mburguk1000]

That is very helpful thank you for time and trouble

[mburguk1000]

Hi Jon I have tried what you said and still cant get it to work

The syntax doesnt even alloe me to configure a redirect list ??

Thanks

Mark 

[Jon Marshall]

Mark

Sorry, the syntax should be "redirect-list" not "redirect list"

Does it give you that option ?

Jon

[mburguk1000]

Whay happens is I enable wccp version 2 and then syntax prompts 3 options

<0-254>    Dynamically defined service identifier number

  version    protocol version

  web-cache  Standard web caching service

<0-254>    Dynamically defined service identifier number

  version    protocol version

  web-cache  Standard web caching service

[Jon Marshall]

Do you mean when you do -

"ip wccp ?"

If so see previous answer where i posted the configuration  ie. you need to define a service group number, any number is fine in that range.

If not then what IOS version and supervisor are you using ?

Jon

[mburguk1000]

The syntax i have is "ip wccp 0 group-list proxy_users (which is my access list to specify who goes through proxy) and then I get prompted to add group address ????

[mburguk1000]

its IOS 12.2 (54)SG1 and supervisor 1V

[mburguk1000]

and its a cisco 4507 switch