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.