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Netscaler HA limitations


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Currently I'm having 2 VPX's in HA setup. They are residing in different datacenters, a few miles from each other.

The planning is to move one datacenter from A'dam to Germany creating an active-passive scenario ( stretched vlans)

 

As I do not want to configure a GLSB , I'm wondering if a HA setup will suffice?

I can't find any restrictions/limitations regarding this. Anyone have a clue?

 

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you need to be sure you have a reliable connection between them.

Also vip subnets should be accessible on both DC's from the same  client subnets. The same thing applies to the back-end subnets where servers live.

You can test by doing a failover and see if your vips  and services are up .

 

Also check the fail-safe feature:

 

https://docs.citrix.com/en-us/netscaler-gateway/12/high-availability/ng-ha-fail-safe-mode-tsk.html

 

you might want to have this enabled.

 

 

 

 

 

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21 minutes ago, Carl Stalhood1709151912 said:

Permanent? Or temporary?

 

If permanent, then stretching a HA pair introduces the risk of split brain where both nodes think they're active. Also, VIPs can only be alive on one of the nodes, not both.

Permanent, it's a stable line and all is stretched and i can use the fail-safe feature...

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18 minutes ago, Mihai Cziraki1709160741 said:

you need to be sure you have a reliable connection between them.

Also vip subnets should be accessible on both DC's from the same  client subnets. The same thing applies to the back-end subnets where servers live.

You can test by doing a failover and see if your vips  and services are up .

 

Also check the fail-safe feature:

 

https://docs.citrix.com/en-us/netscaler-gateway/12/high-availability/ng-ha-fail-safe-mode-tsk.html

 

you might want to have this enabled.

 

 

 

 

 

right I think this will be sufficient

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