Re: [swinog] AS3303 overlapping prefix

2011-04-03 Diskussionsfäden Simon Leinen
Andy Grawehr writes:
> when i check our prefix 193.105.5.0/24 on www.ris.ripe.net i get an
> overlapping prefix: 192.0.0.0/3 announced by AS3303.

Google "AS3303 semi-default".  AS3303 announces this /3 to their
customers and possibly use it internally.  It's part of an elaborate
mechanism to trade off routing table size against path quality.

Some ISPs (including ourselves) even announce 0.0.0.0/0 to customers.
Note how this also "overlaps" with your 193.105.5.0/24.

Best regards,
-- 
Simon.


___
swinog mailing list
swinog@lists.swinog.ch
http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog


Re: [swinog] AS3303 overlapping prefix

2011-04-03 Diskussionsfäden Michel Renfer

Hi Andy

Looks like one of the "semi-default" routes inside 3303. Looks like, 
that the're announced to RIS...


http://www.swinog.ch/meetings/swinog7/BGP_filtering-swinog.ppt

cheers,
michel



Andy Grawehr wrote:


hello,

when i check our prefix 193.105.5.0/24 on www.ris.ripe.net i get an overlapping 
prefix:
192.0.0.0/3 announced by AS3303.
this occured today, but it was not the first time.
has anyone an explanation for this...???

thx
andy


___
swinog mailing list
swinog@lists.swinog.ch
http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog




___
swinog mailing list
swinog@lists.swinog.ch
http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog