Using RFC3021 /31 netmasks on point-to-point links to conserve IPv4 addresses. Comparison with traditional /30 usage and device compatibility notes for Cisco and MikroTik equipment.
Setting up anycast services using Bird OSPF to inject /32 and /128 routes across multiple locations. Using FreeBSD VMs for redundant IPv4/IPv6 anycast DNS and web services.
Comparing methods for redundant internet failover: manual, dual-wan firewalls, and BGP routing. BGP provides automatic failover, simplified troubleshooting, and better control over multi-provider connectivity.
BGP redundancy techniques: prepending, localpref coordination, and address splitting. Comparing methods for inbound failover with pros and cons of each approach.
