How change maximum concurrent l2tp client

[reza.mnp]

1-how change maximum concurrent l2tp user in pfsense ( default max=255)
2- what hardware support 2.000 concurrent l2tp/ipsec  client (cpu-ram in physical and virtual server-esxi)- max internet traffic: 600 Mbps.
3-XG-1541 support 2k concurrent l2tp/ipsec client?
https://store.pfsense.org/XG-1541-1U-pfSense-Security-Gateway-Appliance-P88.aspx ( $2,599.00-$3,648.00
max l2tp/ipsec concurrent ?)