Category: Networking
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Cisco – Prepending Subset of Your BGP Addressing
Scenario: You have a production site in Dallas and a backup site in, say, College Station(CS). You want the public subnet 1.2.3.0/24 to failover to CS if the Dallas facility falls off of the earth. What you want to do my friend is prepend. Prepending is adding your own Autonomous System Number(AS) repeatedly to the…
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DNS A Record Change by Tracking Servers
Here’s the scenario: You have a main site(MS), and a DR site(DR). You have addressing 1.1.1.0/24 at the MS and addressing 2.2.2.0/24 at the DR site. You have several web-servers at the MS that replicate regularly over to the DR site. You want to fail over to the DR servers in the event of a…