Can GSLB be IP based, without pointing to a DNS name?
To answer this question, I must reiterate that GSLB is entirely a DNS response operation despite the fact that is name includes the words “Load Balancing”. As such, the receipt of the DNS query for the IP address of the FQDN is what triggers the IP address selection by GSLB algorithms. If administrators wish to redirect requests from/to specific IP addresses, (for example to an alternate VIP if the back end systems are down), it is possible to use other NetScaler functions such as backup server (as used in D/R GSLB) or possibly some kind of repsonder or rewrite policies. Note that this kind of rewriting may cause some web hosts or application to malfunction – depending on the headers they are looking for. This is the reason that NetScaler’s GSLB site persistence offers two methodologies for redirecting misdirected requests through its Proxy and HTTP Redirect options. Perhaps this is a topic for a future BLOG . Are there any NetScaler settings/options that need to be enabled to allow us
