BGP may take a long "path exploration "process to converge when a single failure occurs. In this paper, we propose a simple novel mechanism, named Anti-loop Probing (ALP), to achieve fast BGP convergence. ALP greatly speeds up the "path exploration " process by slightly modifying BGP rules of when to send withdrawals and when to send announcements. Our simulation shows that ALP can achieve a dramatic improvement in BGP convergence and can be implemented with a little memory overhead.
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