3 ms·
I think no ISP would connect to others with a huge coil of fiber to add that amount of latency.
by chupasaurus 7y ago
I think no ISP would connect to others with a huge coil of fiber to add that amount of latency.
- Hikikomori 7y agoNo? But they do not connect to each other in every city either, which is why you can get this delay even if both parties are in the same city.
- chupasaurus 7y agoAll the uplinks of my ISP with one exception (carrying traffic through various lines up to european IXs) are connected to the Internet through the same MSK-IX which is 900 miles away from my city and adds 4ms latency. I don't think GGP's traffic route is that long though.
- Hikikomori 7y agoNot sure what you are talking about. 900 miles is ~1500km, 1500km at the speed of light in fiber (2/3 of SOL) takes 7,5 milliseconds, so 15ms roundtrip. But I don't see why it's relevant. Forwarding in modern ISP routers is on the tens to hundreds of microseconds level, even if there are many hops it does not add up to that much. So what he has is likely not "switching delay", and even saying that 11ms is 100% switching delay when it's the same city (low amount of hops even if multiple ISP's are involved) is just ridiculous.
- chupasaurus 7y ago> takes 7,5 milliseconds, so 15ms roundtrip. Took that number (it was for one way trip though) from memory, might be scrambled. Just checked, RTT 17ms with 3ms jitter for me. 22ms RTT is still too much though. Even with centralized network for cross-border traffic like in my country, there are IXs way closer than those 1500km to any town on european part and obviously to the East of Urals (the longest distance between IXPs is ~3000km for Krasnoyarsk-Khabarovsk, the longest distance to the closest IXP of 1500km have Norilsk - the most northern city on the globe and it's satellite Dudinka). edit: fixed some english.