Hello, Up until today we have been able to reach hosts in the 59.229.189.0/24network via AS174, Cogent, in Toronto. Now we can not, our packets stop at 38.112.36.101. The support team at Cogent informed me that network isn't in the internet routing table. I attempted to do an AS lookup on it and sure enough it is not. Using looking glass routers in Korea indicate the same. Yet it is still reachable from other networks, I can use 'Team Viewer' and webx to connect to hosts at the remote office which sits within that /24. When on the remote site, i can do traceroutes back to our office in Toronto. This part is a bit confusing to me, from Toronto I get a 'no route to host'. So packets arriving from Korea to our network shouldn't be able to find a route back, even if its taking a different path. any guess why this network may not be advertising its routes or what is going on here? thanks in advance, greg This is the network route from Toronto to Korea: Host Loss% Snt Last Avg Best Wrst StDev 1. 10.101.2.1 0.0% 6 1.5 15.1 1.5 83.3 33.4 2. 10.101.111.11 0.0% 6 0.2 0.2 0.2 0.2 0.0 3. 10.101.101.101 0.0% 6 0.7 0.8 0.7 0.8 0.0 4. 38.122.184.161 0.0% 6 <-- ISP ROUTER 5. 38.20.50.130 0.0% 6 1.9 2.0 1.9 2.1 0.0 6. 38.112.36.101 89.0% 5 1.6 1.7 1.6 1.7 0.0 This is the route from Korea to Toronto, done at the same time as the above. 1 <1 ms <1 ms <1 ms 192.168.0.1 2 1 ms <1 ms <1 ms 58.229.189.1 3 1 ms 1 ms 1 ms 10.254.241.205 4 1 ms 1 ms 1 ms 58.229.66.9 5 2 ms 1 ms 1 ms 58.229.66.105 6 7 ms 5 ms 3 ms 58.229.119.149 7 2 ms 2 ms 2 ms 118.221.7.34 8 144 ms 144 ms 144 ms 58.229.92.254 9 276 ms 208 ms 192 ms te-8-2.car1.SanJose2.Level3.net [4.59.0.161] 10 204 ms 162 ms 162 ms ae-2-70.edge1.SanJose3.Level3.net[4.69.152.80] 11 165 ms 165 ms 165 ms Cogent-level3-4x10G.SanJose.Level3.net[4.68.110.138] 12 156 ms 156 ms 156 ms be2000.ccr21.sjc01.atlas.cogentco.com[154.54.6.105] 13 166 ms 165 ms 165 ms be2164.ccr21.sfo01.atlas.cogentco.com[154.54.28.33] 14 187 ms 187 ms 187 ms be2256.mpd21.mci01.atlas.cogentco.com[154.54.6.90] 15 206 ms 206 ms 206 ms be2158.mpd21.ord01.atlas.cogentco.com[154.54.7.130] 16 216 ms 216 ms 216 ms be2081.ccr21.yyz02.atlas.cogentco.com[154.54.42.10] 17 221 ms 221 ms 221 ms te3-8.ccr02.yyz01.atlas.cogentco.com[154.54.5.85] 18 231 ms 230 ms 230 ms te4-1.mag03.yyz01.atlas.cogentco.com[154.54.86.82] 19 214 ms 215 ms 214 ms 38.122.184.162 <-- OUR ROUTER