AWS Config Rule: NLB Cross Zone Load Balancing Enabled
NLB_CROSS_ZONE_LOAD_BALANCING_ENABLED
Eduardo Van Cauteren
Last Update 8 months ago
Description: Checks if cross-zone load balancing is enabled on Network Load Balancers (NLBs). The rule is NON_COMPLIANT if cross-zone load balancing is not enabled for an NLB.
Trigger type: Configuration changes
AWS Region: All supported AWS regions except China (Beijing), Asia Pacific (Jakarta), Middle East (UAE), Asia Pacific (Hyderabad), Asia Pacific (Melbourne), AWS GovCloud (US-East), AWS GovCloud (US-West), Israel (Tel Aviv), Europe (Spain), China (Ningxia), Europe (Zurich) Region
How to Resolve Manually
This config rule checks whether cross-zone load balancing is enabled for a particular Network Load Balancer. The rule will be marked as non-compliant if one of the NLBs is found with this setting disabled.
In order to resolve this, head on over to EC2 service within AWS Console and locate Load Balancers in the left menu. Find the non compliant load balancer from the list and click on its name.
Once there, click on Actions button and then click on Edit load balancer attributes. At the Availability Zone routing configuration card, enable the Enable cross-zone load balancing option then save changes.
You can check the following picture as an example:
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