Sprint filters

[Henry Kilmer <hank () rem com>]

Hank Nussbacher writes:
> I have an organization which I allocated 147.237.0.0/16 from my country
> block.  They then wanted to subnet and hand out /24s and /23s to the
> dozens of offices they have scattered thru the country and to allow each
> office to connect to whatever ISP they wish.  I told them that Sprint
> would block the announcements of /24s and the like when coming from
> 147.237.0.0.  
>
> They said, then why does Sprint allow its customers to announce /24s from
> their nets?  They gave me as examples: 148.212.0.0 and 145.248.0.0.
> I checked and sure enough here is what I found:

Sprint's customers pay them to announce their routes.  If someone else
doesn't like it, they should filter - like AGIS has done.

-Hank

> *>i148.212.1.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.2.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.3.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.4.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.5.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.6.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.7.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.8.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.9.0/24   192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.10.0/24  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.11.0/24  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.12.0/24  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.13.0/24  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.14.0/24  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.15.0/24  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.16.0/20  192.121.156.41              100      0 1800 1239 1791
> 1292 i
> *>i148.212.32.0/20  192.121.156.41              100      0 1800 1239 1791
> 1292 i
>
> I didn't have a good answer.  Can anyone tell me what I should tell this
> organization?
>
> Thanks,
> Hank
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