Load balancers are available in small, medium, and large sizes. Based on the load balancer size, the load balancer can host different virtual servers and pool members.

Note: In the Advanced & Security tab, the term tier-1 logical router is used to refer to a tier-1 gateway.
Table 1. Load Balancer Scale for Load Balancer Service
Load Balancer Service Small Load Balancer Medium Load Balancer Large Load Balancer
Number of virtual servers per load balancer 20 100 1000
Number of pools per load balancer 60 300 3000
Number of pool members per load balancer 300 2000 7500

A load balancer is attached to one tier-1 logical router. This tier-1 logical router which must be in Active-Standby mode is hosted on the NSX Edge nodes.

NSX Edge has the form factor Bare Metal, small, medium, and large sized VM appliances. Based on the form factor, the NSX Edge node can host a different number of load balancers.

Table 2. Load Balancer Scale for NSX Edge Node
Load Balancer Per NSX Edge Node Small Load Balancer Medium Load Balancer Large Load Balancer Maximum Pool Members
NSX Edge VM - Small N/A N/A N/A N/A
NSX Edge VM - Medium 1 N/A N/A 300
NSX Edge VM - Large 40 4 1 7500
NSX Edge VM - Bare Metal 750 75 18 30,000