Understanding Scope Of Prefixes in L3 Out External EPG in ACI

In ACI the external Routing Peer to the router is done through border leaves with a object called L3Out.   L3Out has an object in it called the L3Out InstP also known as the External EPG.    In the External EPG you can put in Prefixes and choose the scope based on your intended goal.   Under the … More Understanding Scope Of Prefixes in L3 Out External EPG in ACI

Transit Routing Use case – EIGRP with routed interfaces

Beginning with APIC code 1.1, Cisco introduced the ability to allow routes to “Transit” the fabric. Prior to this release, the ACI Fabric was only seen as a collection of “stub” networks, meaning that the ACI Fabric would only advertise Bridge Domain subnets; it would not advertise routes received from an external routing peer to … More Transit Routing Use case – EIGRP with routed interfaces

ACI: Configuring a shared external Layer-3 connection for all Tenants

As with most things with ACI, we have a tremendous amount of flexibility in the configuration options to meet different requirements. In this post, we’ll explore options that allow multiple Tenants to use a common, shared L3Out (routing table) for the entire fabric (as opposed to using a L3OUT per VRF). Assumptions: Only non-overlapping IP … More ACI: Configuring a shared external Layer-3 connection for all Tenants