How to Diagnose Network Connection Issues
To help you diagnose network connection issues, you can view the status of and statistics about the iQuery connections between BIG-IP Global Traffic Manager (BIG-IP DNS) and other BIG-IP systems on your network. iQuery connection information displays for IP addresses that are configured on BIG-IP server objects.
Ensure that the BIG-IP DNS configuration contains at least one BIG-IP server object with a self IP address.
To view information about the connections between BIG-IP DNS and other BIG-IP systems, view iQuery statistics.
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On the Main tab, click Statistics > Module Statistics > DNS > GSLB.
The Global Traffic statistics screen opens.
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On the Main tab, click Statistics > Module Statistics > Link Traffic.
The Link Controller statistics screen opens.
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From the Statistics Type list, select iQuery.
Information about the iQuery connections between this system and other BIG-IP systems in your network displays.
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When you want to estimate iQuery traffic throughput, click Reset.
The following statistics are reset to zero:
- iQuery Reconnects
- Bytes In
- Bytes Out
- Backlogs
- Bytes Dropped
To view information about the iQuery connections between a different BIG-IP DNS and the BIG-IP systems in your network, log in to that BIG-IP DNS and repeat this procedure.
The information in the table describes the iQuery statistics.
| iQuery Statistics | Description |
|---|---|
| IP Address | Displays the IP addresses of the servers that have an iQuery connection with this BIG-IPDNS. |
| Server | Displays the name of the server with the specified IP address. |
| Data Center | Displays the data center to which the specified server belongs. |
| iQuery State | Displays the state of the iQuery connection between the specified server and the BIG-IP DNS. Possible states are: - Not Connected - Connecting - Connected - Backlogged (indicates messages are queued and waiting to be sent) |
| iQuery Reconnects | Displays the number of times the BIG-IP DNS re-established an iQuery connection with the specified server. |
| Bytes In | Displays the amount of data in bytes received by the BIG-IP DNS over the iQuery connection from the specified server. |
| Bytes Out | Displays the amount of data in bytes sent from the BIG-IP DNS over the iQuery connection to the specified server. |
| Backlogs | Displays the number of times the iQuery connection between the BIG-IP DNS and the specified server was blocked, because iQuery had to send out more messages than the connection could handle. |
| Bytes Dropped | Displays the amount of data in bytes that the iQuery connection dropped. |
| SSL Certificate Expiration | Displays the date the SSL certificate expires. |
| Configuration Time | Displays the date and time that the BIG-IP DNS configuration was last modified. The timestamps should be the same for all devices in a BIG-IP DNS synchronization group. |