Administration Guide › Set Up Distribution and Routing › DSAs with the Same Prefix › Failover and Failback › Client Failover between Router DSAs › Other Methods for Router Failover

Other Methods for Router Failover

Other approaches have been taken, and each has its pros and cons as follows:

Round-robin DNS

This solution is easy to implement, but each client must maintain affinity with a single router DSA for the duration of its connection. Also the inherent delays in pushing out changes to the DNS records might cause a problem.

IP failover

Another good solution is to provide an immediate IP failover mechanism between the computers running router DSAs. There is some extra configuration required for a router DSA to bind to a new IP address, but it can be done. Ensure that the method you choose is immediate, does not require rebooting, and handles failback.

Network load balancers

These are not recommended. Network load-balancers may reduce the performance of CA Directory.