Synopsis: The users were temporarily unable to reach adjacent countries internet web sites for short period of time (less than 1 – 3 minutes) due to an issue of Internet BGP backbone.
Description: On Sat, I was surprise that some internet web site looks unstable. It is not only happens on a single web site.
What do you think about or do you aware?
There are likely to be similar problems that you can find below:
- The ABC ISP (AS __xx) configured a static route 220.127.116.11/24 pointing to null in order to block Facebook access for ABC ISP customers. However, the ISP started to announce the prefix 18.104.22.168/20 towards its upstream provider CDEF (AS xxxx) that propagated the announcement to its peers. Meanwhile Facebook (AS32934) that had been announcing prefix 22.214.171.124/20 so far, started to fight back. Facebook began to announce more specific prefix 126.96.36.199/24. They kept announcing 188.8.131.52/24, however the service would still not be available for a large part of Facebook users. Those were the users whose traffic took a path towards ABC ISP (AS__xx), thus it could not reach Facebook. The traffic was being backhauled by a static route configured on ABC (AS__xx) edge router.
- Bogus AS Path