Use route-views to view the global route table

The number of IPv4 addresses is as high as 4 billion. After some private and reserved IP addresses are removed, the number of public addresses on the Internet is still considerable (although these addresses are still insufficient ), after summary and reasonable allocation, there are still nearly 0.3 million route entries on the Internet! In order to select the optimal path for a router running on the Internet to reach a global destination, it is necessary to receive most or even all route entries, presumably many people will be very interested in this BGP Route table containing global routes? Let's check it out!

1. Enable securecrt, putty, or even the system's built-in TelnetProgram(It is not recommended to use the built-in system)

2. telnet address: route-server.ip.att.net

3. Then, you will receive some welcome information and prompt to enter the user name and rviews

4. The vro user mode has been entered. We can execute some basic production and viewing commands, such as show IP route show version. To view the route table, you only need to enter show IP route, and the dense route prefix will appear. Use the Space key to flip the page and press enter to display the route table line by line, or display any characters interrupted. I don't write many commands. Check it.

The above router belongs to at&t, is a Cisco 7206vxr router, equipped with a NPE-G1 engine, has 3 Gigabit ports, it establishes an ebgp relationship with the router in the IP service backbone network of at&t. Its BGP Route table has over 0.3 million prefixes! More than 5.5 million paths! More than 300 MB of memory is used to store these prefixes and paths. This does not include some path attributes in the prefix! The entire BGP occupies approximately MB of memory.

There is also an available for viewing: route-views3.routeviews.org/is also Cisco 7200 but the engine is stronger, is a NPE-G2!

Route-views is a plan designed to facilitate network engineers to view and obtain real-time information about the global routing system. What you access may not be a real router, it may be obtained indirectly through route-views.