59.229.189.0/24

Mon Mar 24 20:49:07 UTC 2014

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