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• Kubernetes clusters require IP addressing for network communication between pods and agents on nodes.
• Assigning large IP blocks for Kubernetes constructs can cause fragmentation problems within organizations and make it difficult to migrate workloads to new clusters.
• The Kubernetes networking team has introduced solutions such as single stack IPv6 and IPv4 only support, dual stack IPv4 and IPv6 support, and multiple cluster ciders support for node ipam to address these challenges.
• Upcoming solutions include multiple service ciders and reserving static and dynamic allocation for service IP ranges.
• Best practices for Kubernetes IP management include starting with a smaller application allocation for IP address ciders and gradually building up, and moving towards IPv6.
• The networking community is being asked for feedback on the possibility of mixed mode services.