R1-----R2-----R3
R2 is required to be able to telnet to R1, R3, and to switch quickly
R2: Add telnet to R1 first, then press the key firstCtrl + Shift + 6, And then pressXReturn to the R2 console. If you press ENTER twice in a row, you can telnet to R1 again. Now return to R2 and telnet to R3. Now R2 has two connection session records, which can be viewed using the following command:
R2 # show sessions
Conn Host Address Byte Idle Conn Name
1 12.1.1.1 12.1.1.1 0 0 12.1.1.1
* 2 23.1.1.3 23.1.1.3 0 0 23.1.1.3
Then you can directly enter the connection number and enter the Enter key in the privileged mode of R2 to telnet to the corresponding router!
Use the following command to connect to a session on the Port:
R2 #Disconnect2
This article from "do not: lazy, quick success" blog, please be sure to keep this source http://3824597.blog.51cto.com/3814597/1295138