I am responsible for the Configuration of the Loadbalancer to support
Healthchecking of the Nokia Active Server Cluster. We are using a Cisco CSS 11100. Currently the CSS is set to do healthchecking on Layer 3, i.e. it pings the Clusternode. However, this seems not appropriate in order to have a valid response from the Clusternode, for they are configured to use udp port 9201/9203, meaning Layer 4. I was looking for a way to apply Layer 4 Loadbalancing to the Gateway but since udp is a connectionless protokol i will have to build a mechanism to simulate a connection based on udp.
We can not depend on the internal monitoring of the NACS-Cluster only and need the CSS to achieve high availability in the chain. I hope you will be able to point us to a possible solution.