## Configuring Border Leaf Settings

1. Check the Enable Border Leaf/Edge Router Auto-configuration to globally enable Border Leaf/Edge Router auto-configuration.

2. Specify the autonomous system (AS) number to compose the Route Target using the BGP protocol. This AS number is the same across the fabric.

Note If you do not specify AS number, DCNM will be disabled.

3. From the Load Balancing Algorithm list, select the algorithm that must be used by DCNM to determine whether to choose border leaf based on the least load, fair share, round robin, resource consumption, speed or other criteria.

Note In Cisco DCNM Release 7.1 (1), only Round Robin algorithm is supported.

If your setup has vPC pair of border leaf, the vPC pair is chosen with priority over Round Robin. If a switch that is part of vPC pair is selected for partition (VRF) extension, DCNM will also select the vPC pair for the same partition (VRF) extension for load balancing.

4. Specify the Redundancy Factor to ensure VRFs is extended on the specified number sets of border leaf switch.

Note The selected number of Border Leaf/Edge Router pairs for partition (VRF) extension also depends on the Border Leaf/Edge Router pairing topology. Therefore the number of pairs is equal to or greater than the specified redundancy factor.