Network Load Balancers now support Weighted Target Groups

This article announces weighted target groups for AWS Network Load Balancers (NLB), enabling traffic distribution control across multiple target groups without multiple load balancers.

• Assign numeric weights (0-999) to NLB target groups for traffic steering
• Supports blue/green and canary deployments with zero downtime
• Reduces infrastructure costs and operational overhead versus multiple NLBs
• Available now on new and existing NLBs in all commercial regions
• Enables target group maintenance by setting weights to zero
• All target groups in listener must use same protocol (TCP or TLS)
• Stickiness supported at listener level for TCP, UDP, TCP_UDP
• CloudWatch metrics now viewable per-target group basis
• Weighted routing evaluation feature helps identify configuration inconsistencies

Weighted target groups simplify traffic management for NLBs, eliminating need for Route 53 weight management and multiple load balancers.