question about bogon prefix

[morrowc.lists at gmail.com (Christopher Morrow)]

On Mon, Jun 9, 2014 at 11:00 PM, Song Li <refresh.lsong at gmail.com> wrote:
> Hi everyone,
>
> I found many ISP announced bogon prefix, for example:

sad, right?

> OriginAS Announcement Description
> AS7018  172.116.0.0/24  unallocated
> AS209   209.193.112.0/20 unallocated
>
> my question is why the tier1 and other ISP announce these unallocated bogon

OSS is hard.

> prefixes, and another interesting question is:
>
> If I am ISP, can I announce the same bogon prefix(172.116.0.0/24) with
> AS7018 announced? Will this result in prefix hijacking?
>

technically you are probably hijacking a hijack :( or something like that.

> Thanks!
>
> --
> Song Li
> Room 4-204, FIT Building,
> Network Security,
> Department of Electronic Engineering,
> Tsinghua University, Beijing 100084, China
> Tel:( +86) 010-62446440
> E-mail: refresh.lsong at gmail.com