[V-1-206235470] 2001::/32 announed by InfoSphere

[Daniel Roesen]

Michelle,

On Tue, Apr 12, 2005 at 04:21:54AM +0000, Michelle Myers wrote:
> 	We are not seeing this route announced accross our network or being
> received from 2514 ... do you have any more information on this?

Thanks for looking into the issue. It's most probably a ghost route,
produced by a known Cisco IOS bug (IOS "sometimes" forgets to send BGP
withdrawls for routes), see http://www.sixxs.net/tools/grh/what/

Looking at the tail of the AS_PATH "5609 6762 2914 2514" and confirming
that 6762 doesn't have the 2001::/32 anymore
(http://bassotto.noc.seabone.net/ASpath/bgp-table-snapshot.txt), it's
definately not Verio experiencing the bug.

Nevertheless, the announcement WAS done by 2514 and you forwaded it at
least to 6762, so you do/did have a filter problem with 2514 as you
shouldn't have accepted this prefix from them.


Best regards,
Daniel

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