Overview
This article explains how to validate if the cache server serves an IP address. This should be the first step to check when there is an issue for a specific IP address, e.g., the download traffic drops in a particular client IP while passing through the cache.
Information
- Check system unknown graph, this graph should be always "0", If you found a number greater than 0, that means you missed the CIDR pool in the cluster configuration.
https://management-ip/ui/statistics/tcp_connections/unknown_direction/all
- The subscribers who are served from the cache are defined in the cluster_conf.xml configuration file, in the tag
<subnet_range_per_link name="a">, one<cidr_range>line per subscriber in CIDR notation. See the example below:
<subnet_range_per_link name="a">
<cidr_range>192.168.0.0/24</cidr_range>
<cidr_range>10.20.20.0/16</cidr_range>
- If the IP with the issue is not in an IP range in the configuration file, it is not served by the cache, and it does not generate any CDR to analyze.
- Please double-check the client IP address which is configured on PBR/DPI to forward traffic to PACache and open a support ticket to update the missing CIDR pool in the cluster configuration.