Adding Siblings to an ICP Neighborhood

To add sibling proxies to an ICP neighborhood

Steps

1. Access the Server Manager, and click the Caching tab.

2. Select the Configure ICP link.

   The Configure ICP page displays.

3. In the Sibling List section of the page, click the Add button.

   The ICP Sibling page displays.

4. In the Machine Address field, enter the IP address or host name of the sibling proxy you are adding to the ICP neighborhood.

5. In the Port field, enter the port number on which the sibling proxy will listen for ICP messages.

6. In the Multicast Address field, enter the multicast address to which the sibling listens.

   A multicast address is an IP address to which multiple servers can listen.

   Using a multicast address allows a proxy to send one query to the network that all neighbors who are listening to that multicast address can see; therefore, eliminating the need to send a query to each neighbor separately.

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   Note –

   Neighbors in different polling rounds should not listen to the same multicast address.

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7. In the TTL field, enter the number of subnets that the multicast message will be forwarded to.

   If the TTL is set to 1, the multicast message will only be forwarded to the local subnet. If the TTL is 2, the message will go to all subnets that are one level away.

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   Note –

   Multicast makes it possible for two unrelated neighbors to send ICP messages to eachother. Therefore, if you want to prevent unrelated neighbors from receiving ICP messages from the proxies in your ICP neighborhood, you should set a low TTL value in the TTL field.

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8. In the Proxy Port field, enter the port for the proxy server on the sibling.

9. From the Polling Round down-down list, choose the polling round that you want the sibling to be in.

   The default polling round is 1.

10. Click OK.

11. Click Restart Required.

    The Apply Changes page displays.

12. Click the Restart Proxy Server button to apply the changes.