Is static vxlan configuration available for EX4100?

Static VXLAN on EX4100 is not supported. We can see that information on the following details and links:

Static VXLAN (Unicast VXLAN)

You can implement Virtual Extensible LAN (VXLAN) in a small multichassis link aggregation group (MC-LAG) network using the static VXLAN feature. In the MC-LAG network, Juniper Networks devices function as source and destination virtual tunnel endpoints (VTEPs). In this environment, static VXLAN serves two purposes: 

•  To learn the MAC addresses of hosts in a VXLAN. 
• To encapsulate Layer 2 packets with a VXLAN header and later de-encapsulate the packets, thereby enabling them to be tunneled through an underlying Layer 3 IP network.

Product/Application

EX4650-48Y

QFX5100

QFX5100-VC

QFX5120-48Y

Reference link: https://apps.juniper.net/feature-explorer/feature/6375?fn=Static%20VXLAN%20(Unicast%20VXLAN)

Static VXLAN (Unicast VXLAN) at a bridge domain or VXLAN level

In earlier Junos OS Releases, we supported the configuration of static VXLAN at the global level only. When you configure static VXLAN at the global level, you map all local VLANs or bridge domains to the remote virtual tunnel endpoints (VTEPs) in the list. Now, you can also configure static VXLAN at the VLAN or bridge domain level. When you configure static VXLAN at this level, you map only the specified bridge domain or VXLAN to the remote VTEPs in the list.

Product/Application

EX4650-48Y

MX5

MX10

MX40

MX80

MX150

MX240

MX480

MX960

MX2008

MX2010

MX2020

MX10003

MX10004

MX10008

MX10016

QFX5120-48Y

QFX5120-32C

QFX5120-48T

Reference link: https://apps.juniper.net/feature-explorer/feature/6376?fn=Static%20VXLAN%20(Unicast%20VXLAN)%20at%20a%20bridge%20domain%20or%20VXLAN%20level