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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Basic Router Configuration
Configuring Command-Line Access
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Another way to verify the loopback interface is to ping it:
Router# ping 200.200.100.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 200.200.100.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Configuring Command-Line Access
To configure parameters to control access to the router, follow these steps, beginning in global
configuration mode.
Note The TTY lines are asynchronous lines used for inbound or outbound modem and terminal connections
and can be seen in a router or access server configuration as line x. The specific line numbers are a
function of the hardware built into or installed on the router or access server. In Cisco ISR G2 series
routers, the TTY lines are incremented by 1 and start with line number3 instead of line number 2 in Cisco
ISR G1 series routers. In ISR G2 series routers, line number 2 cannot be accessed since it has been used
for the second core feature.TTY lines are not static and line numbers can be changed in future when more
features are added similar to the second core.
SUMMARY STEPS
1. line [aux | console | tty | vty] line-number
2. password password
3. login
4. exec-timeout minutes [seconds]
5. line [aux | console | tty | vty] line-number
6. password password
7. login
8. end
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