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Rajesh_07_16489's avatar
Rajesh_07_16489
Icon for Nimbostratus rankNimbostratus
Jan 11, 2015

What happens when clients send request to downed DC

My scenario is, we have 2 DCs with pair of LTM at each DC and single GTM is deployed for load balancing the traffic across both the DCs and we configured Round Robin at GTM end to manage both the DCs...
application delivery
BIG-IP DNS
LTM
StephanManthey's avatar
StephanManthey
Icon for Nacreous rankNacreous
Jan 12, 2015

Hi Rajesh,

 

new records in ZoneRunner will be created automatically for each new virtual server. No need to configure them manually.

 

To return multiple resource records you modify the GTM pool configuration (pool has to hold at least two poolmembers for your configuration).

 

Please navigate to DNS >> GSLB:Pools:Pool List and select the pool to be modified. Enable the "advanced" settings and modify the parameter "Maximum Addresses Returned" to the value of "2".

 

From now both A-records (reflecting the 2 virtual servers in the 2 different data centers) will be returned as long as they are available. If GTM monitoring is recognizing a virtual server as unavailable, it will not longer be referenced.

 

Thanks, Stephan