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I don't understand something... How is 300GBPS a lot? If we take London which has 8million and say roughly half of them are on the internet (4million). Wouldn'

I don't understand something... How is 300GBPS a lot? If we take London which has 8million and say roughly half of them are on the internet (4million). Wouldn't that mean that if everyone was using 78kbps we would reach 300 gbps(roughly)? I just don't understand how a tier1 or internet exchange router can only handle 100gbps. That seems extremely low to me considering I have like 1mbps for just my house?

zjs 14y ago
Your calculation is assuming that all of the traffic from those 4 million London-based users is travelling through LINX. While LINX is the IX for London, not all traffic originating from London would have to travel through it; Tier 2 and Tier 3 networks would route some portion of the traffic as well. This diagram from wikipedia shows some of the sorts of alternate routes that might be used: http://en.wikipedia.org/wiki/File:Internet_Connectivity_Distribution_%26_Core.svg http://en.wikipedia.org/wiki/File:Internet_Connectivity_Dist... As an aside: does anyone know of a good resource that gives an example of the rough percentage of traffic that would be handled in each of the various ways?
nadinengland 14y ago
I may have misunderstood this but I think this saying that a single IP (or endpoint) is receive this bandwidth. So there is this much going through the peer network AND regular internet use.
lelandbatey 14y ago
You have 1mbps, but you very, very rarely actually use all of that. It doesn't actually really matter if everyone had 1Gbps internet connections, because most everyone is requesting data so infrequently that the points that must bear all the load can handle it. Pretty much, 100Gbps is about 100 thousand times your internet connection. So, a single 100Gbps line could handle 100 thousand people like you requesting a 1mb file at the EXACT same moment. Spread that out by even a few seconds and that router can handle way more people than that 100 thousand. This is a GROSS oversimplification, but the idea stands.
mprovost 14y ago
100Gbps is the fastest ethernet connection that you can buy (for six figures). So that is always going to be a limitation on the router. They can be aggregated into larger links but I think that is pretty uncommon. The internet is made up of lots of connections between ISPs not a few giant ones, and you can attack each one of those links separately.

zjs 14y ago

Your calculation is assuming that all of the traffic from those 4 million London-based users is travelling through LINX. While LINX is the IX for London, not all traffic originating from London would have to travel through it; Tier 2 and Tier 3 networks would route some portion of the traffic as well. This diagram from wikipedia shows some of the sorts of alternate routes that might be used: http://en.wikipedia.org/wiki/File:Internet_Connectivity_Distribution_%26_Core.svg http://en.wikipedia.org/wiki/File:Internet_Connectivity_Dist... As an aside: does anyone know of a good resource that gives an example of the rough percentage of traffic that would be handled in each of the various ways?

nadinengland 14y ago

I may have misunderstood this but I think this saying that a single IP (or endpoint) is receive this bandwidth. So there is this much going through the peer network AND regular internet use.

lelandbatey 14y ago

You have 1mbps, but you very, very rarely actually use all of that. It doesn't actually really matter if everyone had 1Gbps internet connections, because most everyone is requesting data so infrequently that the points that must bear all the load can handle it. Pretty much, 100Gbps is about 100 thousand times your internet connection. So, a single 100Gbps line could handle 100 thousand people like you requesting a 1mb file at the EXACT same moment. Spread that out by even a few seconds and that router can handle way more people than that 100 thousand. This is a GROSS oversimplification, but the idea stands.

mprovost 14y ago

100Gbps is the fastest ethernet connection that you can buy (for six figures). So that is always going to be a limitation on the router. They can be aggregated into larger links but I think that is pretty uncommon. The internet is made up of lots of connections between ISPs not a few giant ones, and you can attack each one of those links separately.