RE: Route update stats

["Christian Panigl, ACOnet/VIX/UniVie" <]

>Date: Mon, 9 Dec 2002 14:50:18 +0100
>From: "Koepp, Karsten" <Karsten.Koepp@localhost
>
>can anyone of you point me to statistics about the frequency of 
>BGP updates measured at some point in the internet?
>A customer complained about av. 10 updates per second which we
>consider normal, but we'd like to see values for comparison.

    Karsten,
    
    thats really an interesting question:
    
    ACOnet receives a full routing-table from SPRINT/AS1239 and from
    GEANT/AS20965.  Comparing the current BGP session counters:
    
    neighbor SPRINT, uptime ~20weeks, Received  7926940 messages
    neighbor GEANT,  uptime ~ 7weeks, Received 29597194 messages 
    
    which gives a long-term average of 
    
    	419 BGP update messages per minute from GEANT but only
	 39 BGP update messages per minute from SPRINT
	 
    afaik GEANT does no BGP flap damping, SPRINT however does, according to
    http://www.sprint.net/policy/bgpdamp.html
    
    I don't know if damping is the only reason for the factor >10 between
    them, there might be other reasons as well, e.g. SPRINT backbone is
    Cisco based, GEANT is Juniper based and they might be using completely
    different IGPs and iBGP concepts.
    
    I am also suspecting some improperly behaving BGP implementations beeing
    around, e.g. at the VIX we are having peering neighbors who are sending
    superproportional more BGP updates than others with the majority of the
    messages beeing withdrawals for prefixes which they do not own nor
    announce.
    
    Btw, Lambdanet is sending us a long-term average of 2 BGP update
    messages per minute at the VIX.
    
    Kind regards
    CP
    
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