This article provides guidance on how to add irb interfaces to the routing instance mac-vrf.

Adding the irb to the routing instance throws a commit error:

{master:0}[edit]
root@QFX5120# set routing-instances data instance-type mac-vrf

{master:0}[edit]
root@QFX5120# set routing-instances data interface irb.1021

{master:0}[edit]
root@QFX5120# commit check
[edit routing-instances data interface]
 'irb.1021'
  IRB interface irb.1021 should be specified using l3-interface or routing-interface config
[edit routing-instances data]
 'interface irb.1021'
  EVPN: Interface..... irb.1021 could not be created from the configuration
error: configuration check-out failed

To successfully add the irb into the routing instance mac-vrf you have to add it under the vlan hierarchy inside the routing instance mac-vrf

{master:0}[edit]
root@QFX5120# set routing-instances data vlans v1021 l3-interface irb.1021

{master:0}[edit]
root@QFX5120# commit check
configuration check succeeds