Application Slow on Dynamic IP and Fast at Static IP Address Allocation

[Yasir Iqbal]

Dear All,

We are facing a very strange issue on newly deployed application. We have recently deployed an Office Automation application using Alfresco platform using tomcat and configured on Centos 7.0. The setup is deployed on VMWare Esxi 6.0. DHCP server is configured for dynamic ip configuration for the client machines. The application behavior is very strange. When we access the application using dynamic ip configuration on the client, the application response is dead slow and takes about 32 seconds to load the default page. Where as when we access the application using static ip configuration on the client, the application response is too fast. We are using the same ip scheme , default gateway and dns server on the dynamic and static ip configuration. Help is required. Server and clients are connected on Cisco 2960 Switch and DHCP is configured on Cisco Switch.

[Philip D'Ath]

This smells like a reverse DNS issue.

Can you do a reverse DNS lookup of your own IP when you are using a static IP?

Can you do a reverse DNS lookup of your own IP when you are using a dynamic IP?

If the answer is no to the second question then you need to get the server application to stop doing reverse DNS lookups (usually easy), or configure your DNS to allow them.