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Bryton Herdes

@next_hopself

Father of 2 | Husband to @TorreyHerdes4 | Senior Principal Network Troublemaker at @cloudflare | BGP whisperer | Views=own

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Illinois next-hopself.net Joined September 2012
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Latest posts 5

Bryton Herdes @next_hopself
What are the most popular prepend typos that result in weird-looking AS_PATHs?

By my count, AS1 (1x prepend) is the most popular, closely followed by AS7 (7x).

Most AS7 paths are AS30844 trying to prepend 7x to AS327708. radar.cloudflare.com/routing/mrt-ex…

Sorry if you'd hoped for "4".
Bryton Herdes @next_hopself 1d
@tompaseka yep, I'm curious when you see these typos dip off :-)

Is it 3 prepends, 5, 10? Surely the popularity drops off after 5, right?
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Bryton Herdes @next_hopself
@heymingwei I agree with everything in this report except the “end” time.

As recently as yesterday, I could still see (rejected) routes from AS402425 over IX peering, targeting Chinese ISP prefixes.

It seems like the activity is still ongoing but less visible in public BGP.
BGPKIT @bgpkit 6d
AS402425 and AS198474 announced 13 /24s of Chinese carrier space, then appeared in AS paths above carrier origins: 1,294 prefixes on August 1, last sampled October 14. Reconstructed from public MRT data: buff.ly/RiTw1CA
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