https://www.findichgut.net/de/tags/networking/Recent content in Networking on Findichgut.netHugo -- gohugo.iodeThorsten HabichSun, 26 Apr 2026 09:25:20 +0300https://www.findichgut.net/de/howtos/cilium/l2announcements/Sun, 26 Apr 2026 09:25:20 +0300https://www.findichgut.net/de/howtos/cilium/l2announcements/ <p>The Cilium L2 Announcements feature provides an active-passive failover IP for external IPs and LoadBalancer IPs. Although the official documentation mentions the term load balancing, it also makes clear that there is currently no traffic load balancing between nodes. If multiple service endpoints exist within the Kubernetes cluster, the traffic will still be distributed across those endpoints.</p> <p>The feature provides a virtual IP address. At any given time, one node listens for ARP (IPv4) or NDP (IPv6) requests and responds to them. If this node goes down, another node will start responding to these requests and effectively take over the IP address. The feature is based on the <a href="https://kubernetes.io/docs/concepts/architecture/leases/">Kubernetes lease mechanism</a>.</p>