Determine the difference between Telecom Network 163 / CN2 GT / CN2 GIA

When playing vps, we may often hear terms such as traditional 163 backbone network, CN2 Telecom direct line, CN2 GIA highest level line, etc. Today I will introduce the differences and connections between the three, and simply judge the route. Some may also consider the return trip. The same is true for the return trip.

What is CN2 line

CN2 stands for China Telecom Next Carrier Network, abbreviated as CNCN in English, and further abbreviated as CN2.

What are the advantages of the CN2 line

CN2 was proposed as a "premium network project". Its technical structure is far ahead of Telecom's original network. The extremely advanced QOS ensures the smoothness of the network. For details, please refer to the reference. Of course, in addition to advanced technology, its expensive price and exclusivity to a large number of network resources are also important reasons. Ordinary home broadband users cannot use CN2 lines, and they may not be able to use them even if they pay several times the money. However, the price of VPS connected to the computer room of CN2 lines is much higher than that of other lines. There are fewer users, fewer servers, and more exclusive resources allocated, thus ensuring the smoothness of the CN2 line in most cases.

If you want to find a foreign VPS provider with access to CN2 lines, it is recommended to use the keyword search "Next Carrier Network" or CN2.

Comparison of three bearer networks

When it comes to CN2, we have to mention the older generation 163 backbone network, and CN2 itself is divided into two types, so we will compare these three here:

1. Normal 163: This is the most common and common line, also called ChinaNet (AS4134). It is the lowest level. Provincial/overseas/international backbone nodes all start with 202.97. There are no CN2 nodes starting with 59.43 in the whole process. On the outbound route, congestion occurs and the packet loss rate is high.
2. CN2 GT: GT is the abbreviation of Global Transit. CN2 GT is also a type of CN2 line. It has a low level in CN2. The provincial/overseas nodes start with 202.97. The international backbone nodes have 2 to 4 CN2 nodes starting with 59.43. . The congestion level on outbound routes is average, slightly stronger than the 163 backbone network, and more cost-effective than CN2 GIA.
3. CN2 GIA: CN2 is a Global Internet Access product with the highest level. The provincial/overseas/international backbone nodes all start with 59.43, and there are no nodes starting with 202.97 in the whole process. It performs best on outbound routes, with few congestions, and is theoretically the fastest and most stable. Of course, the price is also higher than CN2 GT.

How to determine the line type

Normally, we use mtr or traceroute to determine the specific network bearer type by tracking the routing nodes of network packets. Below, let's give a few examples:

Ordinary 163 backbone network

HOST: www.xxorg.com Loss% Snt Last Avg Best Wrst StDev
  1.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
  2.|-- 173.82.157.121 0.0% 10 0.5 6.6 0.3 62.0 19.5
  3.|-- 208.64.231.6 0.0% 10 0.4 6.8 0.3 38.6 12.5
  4.|-- 129.250.205.121 0.0% 10 20.7 2.6 0.3 20.7 6.4
  5.|-- 218.30.53.73 0.0% 10 1.6 2.7 1.0 5.1 1.3
  6.|-- 202.97.49.105 0.0% 10 2.2 3.0 1.2 4.6 0.9
  7.|-- 202.97.51.137 0.0% 10 165.5 164.7 163.1 167.0 1.2
  8.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
  9.|-- 202.97.94.141 0.0% 10 166.1 169.5 166.1 172.8 2.2
 10.|-- 202.97.85.206 60.0% 10 167.3 242.9 167.3 469.6 151.1
 11.|-- 180.140.104.86 70.0% 10 182.7 182.8 182.6 183.0 0.0
 12.|-- 220.173.118.215 10.0% 10 193.3 209.7 191.0 276.8 26.1

In the entire routing node information, there is no CN2 node starting with 59.43, and some provincial or export nodes start with 202.97, so we can judge that the bearer network is a 163 ordinary line.

CN2 GT line

 HOST: www.xxorg.com Loss% Snt Last Avg Best Wrst StDev
  1.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
  2.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
  3.|-- 192.254.84.153 0.0% 10 1.6 2.4 0.7 3.9 0.8
  4.|-- 192.254.81.5 0.0% 10 4.3 3.2 1.1 4.7 1.1
  5.|-- 218.30.48.241 0.0% 10 1.2 1.3 1.2 1.4 0.0
  6.|-- 59.43.182.102 0.0% 10 150.8 156.5 145.0 214.7 22.4
  7.|-- 59.43.244.138 0.0% 10 145.2 145.3 145.2 146.0 0.0
  8.|-- 202.97.94.113 0.0% 10 147.0 149.9 146.9 169.1 6.9
  9.|-- 202.97.94.137 0.0% 10 151.4 152.5 147.8 157.7 3.7
 10.|-- 183.59.5.233 0.0% 10 147.6 147.8 147.6 147.9 0.0
 11.|-- 183.2.253.22 0.0% 10 150.2 150.5 150.1 152.0 0.5
 12.|-- 183.61.192.202 0.0% 10 153.4 155.1 153.3 168.9 4.8
 13.|-- 113.96.127.6 0.0% 10 151.1 153.0 151.0 165.5 4.5
 14.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
 15.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
 16.|-- 183.2.247.150 10.0% 10 150.9 150.9 150.8 151.1 0.0

In the routing nodes, nodes starting with 59.43 appear. On some exit nodes, nodes starting with 202.97 still pass through, which can be judged to be the CN2 GT line.

CN2 GIA line

HOST: www.xxorg.com Loss% Snt Last Avg Best Wrst StDev
  1.|-- 103.86.xx.1 0.0% 10 28.0 13.4 3.1 42.0 12.2
  2.|-- 118.184.22.61 0.0% 10 1.0 1.2 0.8 2.3 0.3
  3.|-- 59.43.182.102 0.0% 10 144.7 147.8 144.6 176.0 9.9
  4.|-- 59.43.187.109 80.0% 10 146.2 146.2 146.2 146.2 0.0
  5.|-- 59.43.130.145 0.0% 10 146.6 154.1 146.6 212.0 20.6
  6.|-- 59.43.19.138 0.0% 10 164.0 164.1 164.0 164.1 0.0
  7.|-- 59.43.134.54 0.0% 10 178.0 173.4 167.0 194.4 8.6
  8.|--??? 100.0 10 0.0 0.0 0.0 0.0 0.0
  9.|-- 220.173.118.215 10.0% 10 209.5 201.4 190.1 229.3 14.6

It can be seen from the routing path that the hop count of the route is relatively small, and it passes through nodes starting with 59.43.., but does not pass through nodes starting with 202.97. This bearer network type is a CN2 GIA line.

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