Refer to the exhibit. An engineer plans to upgrade the Cisco ACI fabric. Leaf1 and Leaf2 are deployed in a VPC. The fabric is peering with R1 using BGP protocol. Which two actions upgrade the fabric n

Configuring the 'Graceful upgrade' option in the ACI upgrade wizard ensures that the upgrade process is staged, allowing devices in a redundant pair, such as Leaf1 and Leaf2 in a VPC, to upgrade sequentially while the other device continues to forward traffic, minimizing service disruption.

Disabling BGP neighborship between the Cisco ACI fabric and R1 would immediately disrupt external routing and communication, contradicting the goal of a nondisruptive upgrade.

Enabling the 'Graceful Insertion and Removal (GIR)' option during an ACI upgrade ensures that a leaf switch, before rebooting for the upgrade, gracefully withdraws its routes from external BGP peers like R1. This prevents traffic blackholing and allows for a smooth re-establishment of BGP neighborship after the upgrade.

Configuring one maintenance group for every leaf would result in each leaf upgrading individually, but for VPC pairs, a staggered approach with coordinated groups (e.g., one leaf from each pair in a group) is needed for nondisruption, not simply one per leaf.

Creating one update group for all spines would cause all spines to upgrade simultaneously, leading to potential disruption of fabric-wide forwarding and internal control plane stability, which is not a nondisruptive approach.