Cilium vs OpenDaylight

Cilium is an open-source, cloud-native system for providing, securing, and observing network connectivity between workloads using eBPF. Its networking capabilities include CNI, Layer 4 load balancing, Cluster Mesh, kube-proxy replacement, BGP, service mesh, Gateway API, IPv6, host firewall, and ingress. Network policies can enforce identity-aware rules from L3 through L7, including DNS- and HTTP-aware filtering. Security features include runtime protection and transparent encryption of managed host and endpoint traffic using IPsec, WireGuard, or ztunnel; ztunnel support is marked beta. For visibility, Cilium lists service maps, metrics and tracing export, network flow logs, and protocol visibility. Hubble, built on Cilium and eBPF, provides visibility into service communication and behavior. Documentation describes Prometheus and Grafana integrations and Kubernetes support for services including GKE, AKS, EKS, OpenShift, RKE, k3s, and Alibaba ACK. Its container image requires AMD64 or AArch64 hosts running Linux kernel 5.10 or later, or an equivalent kernel such as 4.18 on RHEL 8.10. For environments above 500 nodes, the quick installation guide directs readers to large-environment guidance or specific datapath modes.

OpenDaylight is a free, open-source SDN controller for centralized, programmable network control and monitoring. Its modular design uses YANG models and MD-SAL to connect applications with network hardware through northbound REST APIs and southbound plugins. Listed protocol support includes OpenFlow, NETCONF, BGP-LS, PCEP, OVSDB, LISP, and SNMP, among others. Clustering, sharded data stores, and leader-based consensus support scaling across nodes. The project describes uses in optical transport, service-provider WAN automation, data center SDN, network telemetry, enterprise network control, and ONAP. Its AAA project provides authentication, authorization, accounting, and role-based access control for northbound interfaces. OpenDaylight is self-hosted and runs on Linux, macOS, and Windows; setup requires Java 21 or later. The downloads page identifies Chromium-SR0 as the current release and lists Vanadium-SR1 and Titanium-SR3 under supported releases. Documentation, Zulip chat, mailing lists, a wiki, and weekly Technical Steering Committee meetings are listed as community resources.