aci multisite L3-only across site

14.01 2020 | by massimiliano

aci multisite L3-only across site No Layer 2 extension or flooding is allowed in this specific use case, […]

No Layer 2 extension or flooding is allowed in this specific use case, and different bridge domains and IP subnets are defined in separate sites

Communication between EPGs can be established only after applying a proper security policy (that is, a contract between them), unless the policy component is removed to initially focus only on connectivity

1) Intra-VRF communication: the source EPG and destination EPG belong to different bridge domains mapped to the same VRF instance (the same tenant);

1) Intra-VRF communication: the tenant and VRF instance are stretched across sites, and MP-BGP EVPN allows the exchange of host routing information, enabling intersite communication

2) Inter-VRF communication: the source and destination bridge domains belong to different VRF instances (part of the same or different tenants);

2) Inter-VRF communication: the required route-leaking function to allow this communication is driven simply by the creation of a contract between the source and destination EPGs