Need assiatnce with Stretching L2 (Qty# 1) Vlan from one fabric to another fabric over L3Out

[Tehransoccer]

(Qty# 2) ACI fabrics are connected via a simple iBGP L3Out connection to each other (i.e.: no Multi-site,...).

Due to server migration -  servers are getting disconnected from FabricA ---> get moving way to be connected to FabricB manually (there's no vMotion or any other advanced moving endpoint migration).

Servers have to be able to access their network-storage in the same vlan (subnet is NOT route able)

Please help me out as to how stretching L2 Vlan over existing iBGP L3Out.

Thanks,

[balaji.bandi]

check below document to understand how you can strech Layer 2 (is this what you looking ?)

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/kb/b_kb-aci-stretched-fabric.html

https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-737855.html

[Sergiu.Daniluk]

Hi @Tehransoccer 

Stretching a vlan between two individual fabrics interconnected with L3out is not possible.

Stretch ACI fabric (the first link shared by @balaji.bandi) is a precursor of ACI Multi-Pod, and I do NOT recommend it. It's really not worth the effort.

You have basically two options:

• the expensive approach: convert them in a multi-site, but you need extra MSO controller for it
• the impacting approach: convert the the fabrics into Multi-Pod, but that means you will need to wipe the fabric 2 and add it as Pod 2 in first fabric

Stay safe,

Sergiu