We currently have a number of different deployment templates for the MX's we have in our estate, and we have each template to assign a number of unique /24 subnets from a /16 subnet for each VLAN.
We are looking at deploying some Z3 devices which obviously a /24 subnet for 3 VLANs for example is way over the top.
What i'm wondering is, if we are wanting to deploy an additional template for the Z3 devices only with /28 subnets for each vlan from the same /16 range as the other templates above, will this cause issues for any subsequent /24 range that will be issued for the non z3 templates?
Non Z3 Template
VLAN100 - 10.0.0.0/24
VLAN200 - 10.0.1.0/24
VLAN300 - 10.0.2.0/24
VLAN100 - 10.0.3.0/28
VLAN200 - 10.0.3.16/28
VLAN300 - 10.0.3.32/28
Is the Subnet issuing smart enough to realize that the 10.0.3.0/24 subnet is partially assigned?
Hope that makes sense and sorry if this sounds stupid.
I don't know the answer.
What I believe happens is that when a subnet is chosen it consults the AutoVPN routing table for the Org to see if the subnet is free first. If this understanding is correct then you will be fine,
You should have no troubles trying to accomplish this. I am currently using the same summarized subnet across 4 templates. @PhilipDAth is correct in that the AutoVPN routing table is consulted to see if the subnet is available.