Load balancer Discovery issue

[Jithu Jose]

Hi,

I am facing issue to discover the load balancers from ServiceNow, Getting 'Not reachable' while running discovery. Also not able to ping the load balancers from the Mid server as well. Getting Request Timed Out while pinging the devices. But port 443 is open for these devices. Could you please suggest what is the issue hear!

Thanks,

Jidhu

[Amit Gujarathi]

Hi @Jithu Jose ,
I trust you are doing great.
Here are several steps you can take to troubleshoot and potentially resolve this issue:

1. Network Connectivity Check:

   • Ensure that the MID Server has network connectivity to the load balancers. If you can't ping the load balancers, it's possible that ICMP packets are being blocked. Since you mentioned that port 443 is open, try using a tool like telnet or nc (Netcat) to test connectivity on that port.

2. Firewall and Security Group Rules:

   • Verify that any firewalls or security groups between the MID Server and the load balancers allow traffic on the necessary ports. For Discovery, ensure that all required ports for the specific type of discovery you're performing are open.

3. MID Server Configuration:

   • Check the MID Server configuration in ServiceNow to ensure it's correctly set up for the network segment where the load balancers are located.
   • Ensure the MID Server is in the correct MID Server Cluster for your Discovery Schedule.

4. Credentials:

   • Verify that the credentials used for discovery are correct and have the necessary permissions on the load balancers.

5. Discovery Logs:

   • Review the Discovery logs in ServiceNow for any specific error messages or clues. This can be found under Discovery > Status and then by selecting the relevant Discovery Status record.

6. SNMP/SSH/WMI Configuration:

   • Depending on how the load balancers are configured to be discovered (SNMP, SSH, WMI, etc.), ensure that these services are correctly configured and accessible from the MID Server.

7. ServiceNow Discovery Patterns:

   • If you are using Discovery Patterns, ensure they are correctly configured for your load balancers. Sometimes custom patterns are needed for certain types of devices.

8. MID Server Service Account:

   • Ensure the service account running the MID Server has the necessary network permissions.