IP Anycast and multiple IP configurations are powerful techniques for improving website availability and performance. Let's explore how they work, especially with Cloudflare.

IP Anycast

IP Anycast is a network addressing method where multiple servers share the same IP address. Traffic is automatically routed to the nearest server, providing:

• Reduced latency
• Better load distribution
• DDoS attack mitigation
• Improved reliability

Multiple IPs for One Domain

You can assign multiple IP addresses to a single domain through DNS configuration:

example.com.     IN  A     192.0.2.1
example.com.     IN  A     192.0.2.2
example.com.     IN  A     192.0.2.3

Implementing with Cloudflare

Cloudflare provides Anycast IP addresses automatically when you use their services:

1. Sign up for Cloudflare
2. Add your domain to Cloudflare
3. Update nameservers to Cloudflare's
4. Configure DNS records in Cloudflare dashboard

Benefits

• Automatic failover
• Global load balancing
• Enhanced security
• Improved performance

References

• Cloudflare - What is Anycast?
• DNS Records Explained