This is from a related post found here: http://forum.square-enix.com/ffxiv/t...ag-disconnects



Quote Originally Posted by Athoen View Post
SNIP
Essentially this, very well put (better than I could word). Once our ISP reaches NTT's network it is completely out of the control of our ISP. This is why I frequently mention San Jose's routers being the issue. Once we reach our first NTT router it is up to that router configuration to determine where to go next and not the ISP.

Using Kerwin's and my hops: http://forum.square-enix.com/ffxiv/t...T-Router-Issue here is what I believe is going on in steps:

1. You to ISP
2. ISP to NTT
3. NTT Routes to nearest NTT WAN Router Junction to Data Center (San Jose Routers Labeled *.SNJSCA04.*)
4. Lag or flooded connectivity occurs at the NTT WAN Routers/Load-balancers at SNJSCA04 junction causing connections to drop or be delayed.
-> Could be a bad configuration of load balancing (Config issue).
-> Could be that the total allotted broadband spectrum at NTT is full on hardware, or is Soft capped.
-> Could be a DOS attack, or a DOS issue caused by heavy activity at specific times.
5. San Jose routes to physical DC that SE's NA servers reside. (Sacramento routers labeled *.SCRMCA02.*)
6. Sacramento routers route to SE's physical/virtual hardware at 204.2.229.X

Using the above deduction. We can surmise that SE is indeed right, its not the data center; but it is a choke point at the routers (that NTT owns) short ways up stream.