Router configuration very basic

After the boot Router first screen appear





here we have to type  "NO"


Q :- how to change mode (enable to privilege )

Router>
Router>!! this is user-execution mode !!
Router>!! start basic configuration !!
Router>
Router>enable                      
Router#!! this is privilege / enable mode !!
Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#!! this is user-configuration mode !!
Router(config)#

Q :- how to change Rourter host name

Router#
Router#
Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#hoste
Router(config)#hostname R1
R1(config)#
R1(config)#

Q :- how to check running configuration

R1#show
R1#show run
R1#show running-config
Building configuration...

Current configuration : 1186 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
 --More--

Q  :- how to check startup configuration

R1#show star
R1#show startup-config
Using 402 out of 57336 bytes!
!
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
ip cef
no ip domain-lookup
no ip icmp rate-limit unreachable
ip tcp synwait 5
no cdp log mismatch duplex
!
line con 0
 exec-timeout 0 0
 logging synchronous
 privilege level 15
 no login
line aux 0
 exec-timeout 0 0
 logging synchronous
 privilege level 15
 no login
 --More--

Q :- how to check interface status

R1#show ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            unassigned      YES unset  administratively down down   
FastEthernet0/1            unassigned      YES unset  administratively down down   
Serial1/0                      unassigned      YES unset  administratively down down   
Serial1/1                      unassigned      YES unset  administratively down down   
Serial1/2                      unassigned      YES unset  administratively down down   
Serial1/3                      unassigned      YES unset  administratively down down   
R1#
R1#

Q :- working of DO command

Answer :- if we are using privlage level command in configuration mode we have to use DO keyword

R1#
R1#conf
R1#configure ter
R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#
R1(config)#do show ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            unassigned      YES unset  administratively down down   
FastEthernet0/1            unassigned      YES unset  administratively down down   
Serial1/0                       unassigned      YES unset  administratively down down   
Serial1/1                       unassigned      YES unset  administratively down down   
Serial1/2                       unassigned      YES unset  administratively down down   
Serial1/3                       unassigned      YES unset  administratively down down   
R1(config)#
R1(config)

Q :- how to save router configuration

R1#
R1#cop
R1#copy run
R1#copy running-config star
R1#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
R1#
R1#

Q :- how to check router Flash: and there detail version of router

 R1#show version
Cisco IOS Software, 3700 Software (C3725-ADVENTERPRISEK9-M), Version 12.4(15)T10, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Mon 14-Sep-09 15:53 by prod_rel_team

ROM: ROMMON Emulation Microcode
ROM: 3700 Software (C3725-ADVENTERPRISEK9-M), Version 12.4(15)T10, RELEASE SOFTWARE (fc3)

R1 uptime is 22 minutes
System returned to ROM by unknown reload cause - suspect boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19
System image file is "tftp://255.255.255.255/unknown"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
        
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
        
If you require further assistance please contact us by sending email to
export@cisco.com.
        
Cisco 3725 (R7000) processor (revision 0.1) with 124928K/6144K bytes of memory.
Processor board ID FTX0945W0MY
R7000 CPU at 240MHz, Implementation 39, Rev 2.1, 256KB L2, 512KB L3 Cache
2 FastEthernet interfaces
4 Serial interfaces
DRAM configuration is 64 bits wide with parity enabled.
55K bytes of NVRAM.

Configuration register is 0x2102