On Thu, Jul 01, 2004 at 07:09:52PM -0500, Erik Amundson wrote:
NANOG, I have a question regarding information on my ISP's peering relationships. Are the speeds of some or all peering relationships public knowledge, and if so, where can I find this? By speed, I mean bandwidth (DS3, OC3, 100Mbps, 1Gbps, etc.). I am trying to transfer large stuff from my AS, through my ISP, through another ISP, to another AS, and I'm wondering how fast the peering point is between the ISPs. I'm working with my provider to get this information as we speak, but I'm wondering if it's available publicly anywhere. If it were, this could be one way to evaluate providers in the future, I guess.
perhaps you have already beaten this dead horse enough but here is my non-flash, stick/ascii rendition... { ISP core } --- [rtr] --- [possibleIX] --- [rtr] --- { ISP core } lkA lkB lkC lkD lkA & lkD are "hidden" from external view. if you are a customer of ISP which owns lkA, they -may- tell you what the characteristics of lkA are ... "today". No assurances that it will remain the same for any given period of time. And the ISP with lkA is unlikely to be able to judge/interpret the accuate value of lkD, although this may be infered from their peering SLAs... which are generally NDA'ed. if ther exists a "possibleIX", there is the strong case that the interconnects are one of the possible ehternet formats, e.g. 10Mbps in full or half duplex, 100Mbps in either full or hald duplex, or 1Gbps, generall full duplex. Yes, there are some other varients... :) And there is no assurance that lkB and lkC are the same! in the case where there is no "possibleIX" and the links lkB and lkC are the two sides of a point2point link, then more choices arise and the potential for determining the actual "speed" of the link. then there are the other "tweekable" characteristics of a specific link (MTU, MSS, etc.) which will affect throughput/goodput of that specific link. Sorry for the additional flogging. :) --bill (wading thorugh two weeks of old email)