If both gateways managed by the same management server you can't user pre-shared secret for authentication. the only option is certificate. In your case I believe one of the devices can't reach the management server to validate the certificate. The gws will reach the management server on TCP port 18264. the issue might be the management server doesn't have a public IP and if the management server has a public IP the 1430 might be trying to reach the private IP of the management server to validate the certificate.
There are couple solutions:
- Change the 1430 to be locally managed or managed by different management server you can use pre-shared key (if the 1430 has static IP)
- Disable CRL fetch mechanism in Guidbedit global or per gw which is not recommended.
- use 3rd party accessible certificate authority
Thanks