Exam 300-620 topic 1 question 143 discussion

A -> Shared Service (Route Leaking) enables traffic between endpoints in different VRFs. • A shared service EPG provider is an EPG that provides a contract consumed by an EPG in a different VRF Restrictions • Provider Subnet must be defined under the provider EPG • Both provider and consumer subnets must have scope set to shared • contract needs correct scope • VzAny not supported as provider Shared Service (Route Leaking) enables traffic between endpoints in different VRFs. • A shared service EPG provider is an EPG that provides a contract consumed by an EPG in a different VRF Restrictions • Provider Subnet must be defined under the provider EPG • Both provider and consumer subnets must have scope set to shared • contract needs correct scope • VzAny not supported as provider Scope:  Private to VRF  Advertise Externally -> Share Between VRFs page 136 https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2019/pdf/BRKACI-3101.pdf

Private to VRF = This subnet will only be routed internal to the ACI fabric. This is to say it won't be advertised via any L3outs. Advertise Externally = The opposite of Private. This means you want this subnet to participate in any associated L3outs. Shared Between VRFs = This is used when you want to do route leaking between different VRFs Please note that Shared Services term which is widely used in most of the documents is nothing but about Inter VRF/Tenant Communication. Define the subnets at BD level for both the EPGs in both VRF and mark them as Shared between VRFs.

https://community.cisco.com/t5/data-center-and-cloud-blogs/cisco-aci-inter-vrf-tenant-route-leaking-design-simplified/ba-p/3820919