Defining IP Address Ranges for Filters
You can specify a range of IP addresses to filter both the traffic source and/or destination IP addresses. When a range of IP addresses is needed, the sip (source) or dip (destination) defines the base IP address in the desired range, and the smask (source) or dmask (destination) is the mask which is applied to produce the range.
For example, to determine if a client request’s destination IP address should be redirected to the cache servers attached to a particular Alteon, the destination IP address is masked (bitwise AND) with the dmask, and then compared to the dip.
Example
You can configure Alteon with two filters so that each handles traffic filtering for one half of the Internet. To do this, define the following parameters:
Example Filtering IP Address Ranges
Filter | Internet Address Range | dip | dmask |
---|
#1 | 0.0.0.0 - 127.255.255.255 | 0.0.0.0 | 128.0.0.0 |
#2 | 128.0.0.0 - 255.255.255.255 | 128.0.0.0 | 128.0.0.0 |