For Juniper Networks EX/QFX Series Switches that support EVPN VXLAN, after configuring the following commands, we show a commit error:

set protocols evpn encapsulation vxlan
set protocols evpn multicast-mode ingress-replication
set protocols evpn extended-vni-list all

[edit protocols evpn encapsulation]
'encapsulation vxlan'
Encapsulation can only be configured for an EVPN instance
[edit protocols evpn encapsulation]
'encapsulation vxlan'
error: commit failed: (statements constraint check failed

On Juniper Networks Switches, when configuring protocols EVPN, we need to configure default routing instance options (virtual switch type).

For example:

[edit]
user@Spine1# set switch-options vtep-source-interface lo0.0
user@Spine1# set switch-options route-distinguisher 192.168.1.1:1
user@Spine1# set switch-options vrf-target target:65000:1

user@Spine1# set switch-options vrf-target auto

This is explained on the configuration guide for EVPN VXLAN:
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/index.html

08/09/2023 - KB Created
01/16/2024 - Minor edit.