Multi-VRF L3Out to legacy site

[ilja.slepnev]

Hello,
I have ACI fabric (APIC v5.1) and legacy backbone routers (NX-OS 9.3). ACI config is trivial: one user tenant, one VRF and one L3Out with static routing to the backbone using L3 routed interface.

Now, I have to extend second VRF from NX-OS backbone to ACI fabric. Is it possible to configure ACI the same way it is done on NX-OS using L3 subinterfaces with VLAN encapsulation on same physical link? What are the limitations?

[Sergiu.Daniluk]

Hi @ilja.slepnev 

Yes, it is possible to use multiple L3Outs configured in different VRFs over different subinterfaces on the same phy interface.

Limitation wise, well not much to tell you here since there might be or not, depending on the protocol/design/features/version you use.

My suggestion when it comes to limitations, is to check the whitepaper & cfg guide to the specific protocol/feature/version you implement:

L3Out whitepaper: https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/guide-c07-743150.html

L3Out Config guide: https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/l3-configuration/cisco-apic-layer-3-networking-configuration-guide-52x/node-and-interface-for-l3out-layer3-config-52x.html

Stay safe,

Sergiu