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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: AS_PATH length and route selection (WAS: Strange BGP announcement)
Best guess approximation? Say not more than 1 minute per router (* N router hops between 1 edge of network and the other?) typically more like 10 seconds on moderately loaded routers/links? Assuming you aren't re-establishing each iBGP session from scratch and only receiving an update from 1 connection (peer or customer)? Does that sound reasonable? -Deepak. On Wed, 18 Nov 1998, Sean M. Doran wrote: > Ben Black wrote: > > | The key to this is that the administrative preference in question has domain > | scope. Assuming you are correctly implementing iBGP, whether with a full > | mesh, reflectors, or confederations, and assuming consistent announcements > | from external route originators, then you can't make a loop because the > | same policy is in effect for all the routers in the AS. > > You will not form a *persistent* loop or black-hole. However, > as there is invariably some degree of propagation delay among iBGP > speakers, particularly in a large network, there can be short-lived > loops or black-holes when converging upon routing changes. > > Sean. >
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