Starting from release 4.2(1) ACI allows to configure an intersite L3Out on a multi-site ACI fabric. This feature enables for an endpoint in a site to send traffic to Layer 3 resources accessible via a remote L3Out connection. Before release 4.2(1) endpoints deployed in a given site can communicate with the external network domain only through a local L3Out connection.
ACI Multi-site Intersite L3Out Read More »
ACI fabric supports transit routing. This feature enables a border leaf to perform bidirectional redistribution between routing domains. A transit traffic can pass from one layer 3 domain to another layer 3 domain through ACI (the ACI acting as a transit between the two layer 3 domains). A transit route is defined to import traffic through a Layer 3 outside network of an L3out where it is to be imported. A different transit route is defined to export traffic through another L3out to the destination routing domain.
The route-maps for import and export route controls are made up of prefix-list matches. Each prefix-list consists of bridge domain (BD), external subnet prefixes in the VRF and the export prefixes that need to be advertised outside. Route control policies are defined in an l3out and controlled by properties and relations associated with the l3Out. APIC uses the enforce route control property of the l3Out to enforce route control directions. The default is to enforce control on export and allow all on import. The default scope for every route is import. These are the routes and prefixes which form a prefix-based EPG…
Cisco ACI Transit Routing: A Step-by-Step Configuration Guide Read More »
