Router ID and VTEP Loopback IP Allocation in Clos and Non-Clos Fabric

You can choose uniform or granular IP allocation scheme for Router ID and VTEP Loopback.

From XCO 3.3.0 onwards, the default scheme for an IP allocation is Uniform. This means that the IP allocation scheme for both Router ID Loopback and VTEP Loopback remains unchanged. An IP is allocated from the IP range defined in the loopback-ip-range fabric setting.

To use different IP range for Router ID Loopback and VTEP Loopback, choose the Granular IP allocation scheme. Provide different IP range for Router ID Loopback and VTEP Loopback using the router-id-loopback-ip-range and vtep-loopback-ip-range fabric settings.

The IP range provided by you should not overlap with the IP ranges provided in other fabric settings. For example, P2P Link IP range and MCT Link IP range.

Note

The existing fabrics prior to XCO 3.3.0 and the newly created fabrics from XCO 3.3.0 onwards continue to operate in the older (uniform) scheme by default. You must explicitly choose the newer (granular) scheme .
You cannot dynamically change the older scheme to newer scheme if the devices are already added to the fabric.
Once the fabric is configured, you can only expand the IP Range. Compressing the IP range on an active fabric is not supported.