Fast convergence after failures has always been an important part of ISP network design.
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Recently I stumbled upon the IETF draft about PIM Designated Router Load Balancing (DRLB) and it reminded me of something absolutely barbaric.
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This story is about the importance of remembering networking fundamentals when dealing with advanced routing topics.
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Yes, this has already happened to many networks across the globe. And for sure will happen again. Maybe to your network?
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