We have a stack of EX4600s that act as the core of our network. All routing is done through these switches. All edge switches (EX4200s) just do layer 2. I have two non-routable vlans, one for storage and one for vMotion. Below is a shortened list of vlan definitions and as you can see there is no layer 3 interface for vlan 126 or 127. There is an irb defined for these two though. Can I just delete the irb for these two since they appear not to be used? A vlan for just storage traffic and a vlan for vMotion are never routable per best practice.
Yes—if you never need to route traffic to or from these subnets then you don’t need an irb interface or its layer 3 address. The vlan simply becomes a bucket for connected hosts to talk directly to each other.