Lots of prepends - AS20912 case

Andree Toonk andree+nanog at toonk.nl
Fri Feb 20 18:42:04 UTC 2009


.-- My secret spy satellite informs me that at Fri, 20 Feb 2009, Giuliano Peritore wrote:
>         I think that the case of AS47868 is the same, because I seed the 
> modulo was involved too.

For those interested, I made an overview of longest AS paths observed per day, starting with February 1st.

I added a feature that checks if number of prepends matches the low-order 8 bits of the offending AS number. 
Indicating that it's likely caused by the same Mikrotik bug/feature.

The list can be found here:

Interesting is that the first time this was observed was actually on February
9th (251 prepends by AS45307). Apparently the impact was not as widespread as
this week. 


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