Sprint filters

Wed Feb 19 14:21:07 UTC 1997

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
>