NX-OS Spine/Leaf Operations: vPC, Port-Channels, and Pre-Production Checks
Operate Nexus spine/leaf fabrics without surprises. Covers vPC operational checks, port-channel hygiene, OSPF/BGP underlay verification, and failure drills before go-live.
#ha
9 posts tagged with "ha"
Cisco IOS-XE Edge Baseline: AAA, SSH, ACL, Logging, and IP SLA
Build a production-ready IOS-XE edge router. Covers secure management, IP SLA tracking for real failover, logging configuration, and common mistakes that break production.
Graceful Restart: Maintaining Forwarding During Protocol Restarts
Configure OSPF and BGP graceful restart on VyOS. Covers GR mechanics, helper mode, restart timers, and why graceful restart prevents traffic loss during maintenance.
BFD: Fast Failover Detection for Routing Protocols
Implement BFD on VyOS for sub-second failure detection. Covers BFD timers, integration with BGP and OSPF, multihop BFD, and why routing protocol keepalives are too slow.
High Availability: VRRP + State Sync (What You Can and Can't Do)
Honest guide to VyOS high availability using VRRP and conntrack sync. Covers failover configuration, state synchronization, what actually fails over and what doesn't, testing procedures, and why HA is a set of failure scenarios, not a checkbox.
Multi-WAN on VyOS: Failover That Actually Works
Configuring reliable multi-WAN failover on VyOS with proper health checking. Covers dual ISP setup, weighted load balancing, SLA monitoring, and why failover without tracking is false confidence.
Ceph on Proxmox: Honest Guide (When It's Worth It, When It's Pain)
Real talk about Ceph on Proxmox. Covers minimum requirements, network design, OSD configuration, recovery behavior, performance expectations, and why Ceph is great when you accept its costs.
High Availability: HA Groups, Fencing Mindset, and Failure Testing
Proxmox HA done right. Covers HA manager configuration, fencing requirements, groups and priorities, maintenance procedures, failure testing, and why HA without tests is just a checkbox.
Cluster Setup: Joining Nodes, Quorum, and Corosync Realities
Building a Proxmox cluster correctly. Covers node joining, quorum mechanics, split-brain prevention, Corosync networking, and why clustering is network discipline, not just a button.