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Re: [rrg] Geoff Huston's BGP/DFZ research - 300k DFZ prefixes are the tip of the iceberg

Amund Kvalbein <amundk@simula.no> Sat, 20 March 2010 03:44 UTC

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From: Amund Kvalbein <amundk@simula.no>
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To: Tony Li <tony.li@tony.li>
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Cc: rrg@irtf.org, Danny McPherson <danny@arbor.net>
Subject: Re: [rrg] Geoff Huston's BGP/DFZ research - 300k DFZ prefixes are the tip of the iceberg
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Yes, in the paper I mentioned (where we observe a sustained level of 
duplicates up to 40% in some monitors), this is the pattern we refer to

Withdrawl
Advertise
Advertise (dup)
Advertise (dup)
Advertise (dup)

http://simula.no/research/nd/publications/Simula.nd.435

Amund


On 20. mars 2010 00:51, Tony Li wrote:
>
> Hi Geoff,
>
>> I'm not sure I understand this Tony. What is in my mind when I read this is
>> a counter case when a BGP speaker sees from a peer:
>>
>> advertise
>> withdrawal
>> advertise a dup of the previous advertisement
>> withdrawal
>> advertise a dup
>> etc
>>
>> i.e. in this case the dups are not irrelevant, and in this case caching of
>> previous
>> validation outcomes would be beneficial.
>
>
> This is a different case than what I think we were discussing.  At least if
> I understand the situation, Lixia and crew were seeing:
>
> Withdrawl
> Advertise
> Advertise (dup)
> Advertise (dup)
> Advertise (dup)
>
> Tony
>
>
> _______________________________________________
> rrg mailing list
> rrg@irtf.org
> http://www.irtf.org/mailman/listinfo/rrg

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