I do online racing on iRacing, and I have been getting consistent "discontinuity" reports when racing, which indicates a connection issue. I've talked to other guys that race in other areas and other ISP's, and they don't have this problem.
I ran a PingPlot to the iRacing server, and it looks like the latency consistently spikes at 25 seconds after every minute, and the packet loss is around the same time.
This is a snapshot of what PingPlotter is showing to the iRacing server (Sample Information shows all 10 hops as comma delimitted times in ms):
AROUND 25sec AFTER EVERY MINUTE TIME SPIKES
Host Information
1,Wireless_Broadband_Router.home,192.168.1.1
2, -------------- ,10.33.34.67
3,G0-3-0-2.DLLSTX-LCR-21.verizon-gni.net,130.81.109.216
4,so-5-0-0-0.DFW9-BB-RTR1.verizon-gni.net,130.81.199.34
5,0.xe-6-0-3.XL3.DFW7.ALTER.NET,152.63.5.93
6,0.ge-4-3-0.XL3.BOS4.ALTER.NET,152.63.16.34
7,POS6-0.GW5.BOS4.ALTER.NET,152.63.25.69
8,internap-gw.customer.alter.net,65.207.236.58
9,border11.te7-1-bbnet1.bsn.pnap.net,63.251.128.41
10, -------------- ,69.25.205.241
Sample Information
"9/8/2012 8:37:18 AM",1,128,5,68,8,68,70,65,65,63
"9/8/2012 8:37:19 AM",0,5,5,5,7,65,70,65,65,65
"9/8/2012 8:37:20 AM",0,3,3,3,6,68,66,63,64,61
"9/8/2012 8:37:21 AM",0,4,4,4,7,64,67,64,64,64
"9/8/2012 8:37:22 AM",0,5,5,5,8,68,68,65,65,63
"9/8/2012 8:37:23 AM",0,4,3,3,6,64,66,71,63,66
"9/8/2012 8:37:25 AM",0,4,4,4,1570,1597,1560,1520,1485,72
"9/8/2012 8:37:26 AM",719,683,645,606,568,588,550,508,471,823
"9/8/2012 8:37:27 AM",0,4,4,4,6,66,66,64,66,64
"9/8/2012 8:37:28 AM",0,13,5,5,8,70,68,65,72,62
Why is this happening? It doesn't look like it's on my end at all (in my network - router, PC, etc).
It looks like an issue between the following:
4,so-5-0-0-0.DFW9-BB-RTR1.verizon-gni.net,130.81.199.34
5,0.xe-6-0-3.XL3.DFW7.ALTER.NET,152.63.5.93