How to Saving your Cisco Router configuration

How to  Saving your Cisco Router configuration


Once complete configure router, then it need to save  because if you forget to save 
configuration then ,it works normally as configured but when a router restart then it 
can't lode again configuration from start up config.because router ram is volatile ram 
means once power off the data will erace.so it must need to save configuration in memory
 below command of save router configuration in permanent memory

Example  :-cisco 1700#copy running-config start up-config

After performing this command a  configuration is now saved to non-volatile RAM
(NVRAM).can also check from command show start up config

Example :- cisco 1700#show startup-config

Read more »

Checking a connectivity in Network

 Checking a  connectivity in Network

   when network is running mode their is every possibility to fail your network devices,

so when ever your  Network device act as ab normal and in some of Cased ,i found that 

Network is down that are not ping or able to Transfer a date but in telnet the interface shown up,but in actual mode that is down.so at that time just power off  router and re insert the interface card. which shown active but not actually up .this is problem of interface hang in some cases router interface hang due to temperature.because 24 hour on so it need cool temperature.this same issues creates in other devices like modems and switch.all my working time i faced this kind of issues so.One most useful and simple diagnostic tool is the ping command. Ping is an uses Icmp protocol  Internet Control Protocol (ICMP). Ping sends an ICMP (32 bit packet)echo request to a destination IP address. If the destination machine receives the Request, it reply with an ICMP echo response . 

For Example :-ping  10.159.105.1  \\ when  connection  Active


  Pinging  10.159.105.1 with 32 bytes of Data:


   Reply from 10.159.105.1  bytes =32  time<1  TTL=255
   Reply from 10.159.105.1  bytes =32  time<1  TTL=255
   Reply from 10.159.105.1  bytes =32  time<1  TTL=255
   Reply from 10.159.105.1  bytes =32  time<1  TTL=255


For Exampls :-ping  10.159.105.1  \\ when  connection  is not Active


Pinging  10.159.105.1 with 32 bytes of Data:

 Request time out
 Request time out
 Request time out
 Request time out

Read more »

Troubleshooting your Cisco router

Troubleshooting your Cisco router


some of issue at Network device,that are common. Many time  it's Network Related issues like some power off,or interface cable are un-pluged come these are the common physical issu. but when ever notice any issur regarding router or user that is connected to router that can not reach a any destination,or any destinattion at all. we will need to check  how the router is attempting to route traffic . Then follow some command .


 Router7206#show interfaces  for checking any Connected interface down or Active
Router7206# #showip protocols
 Router7206##showip route
 Router7206##showiparp

Read more »

Configuring a Router

Configuring a Router 


 At the Router confuguration time take a router when you don't know .wht configuration is in router.it's previously used or not.configuration saved or not or it's blank and new for solution all these question here there are some cisco command for showing the status of the network devices router & Switch .at any point of configuration point try out the following commands:

Router#show interfaces  //it will shows all set Configured or non configurated information
Router#showip protocols //  Sh ip informatiion 
Router#showip route  // Show Possible route connected
Router#showiparp   // Sh MAC Information from Ip Address.

Router#show interfaces  //it will shows all set Configured or non configurated information

Router#showip protocols //  Sh ip informatiion 

Router#showiparp   // Sh MAC Information from Ip Address.

Read more »

Router Diffrent modes

Router Diffrent modes-ExeCution  mode

"#"-Symbol indiacated that tha executong mode,At this mode all Show command run.

Router#

show startup-config

show running-config

copy run start

copy start run

erase startup-config - For Erasing Non Volatile RAm

reload -For Restart Router router

setup - starts initial  dialog

Passwords For Sequirity perpouse

enable secret Sequirity perpouse

enable secret  -To enter Enable Configuration





What is Telnet?

Telnet is network Terminal ,with use of telnet terminal we can see our router's intreface status,we can telnet from any of the ip that has been given to it's interface,We can Change,Edit orremove Router and update Router's Configuration.



Router Diffrent Enable  mode:-

Router(conf-t)#-Symbol indiacated that tha executong mode,At this mode all Show command run.

VTY - virtual terminal password

Telnet access

setup in setup mode

line vty 0 5 - specifies 0 - 5 are telnet sessions

Router(conf-t)#line vty 0 5

Router(conf-t)#password XXXXXx

Router(conf-t)#login

Router(conf-t)#^z

IF No login means no password over telnet

Auxilliary password -for Auxilury modem access.

Router(conf-t)#line aux 0

Router(conf-t)#password xxxxx

Router(conf-t)#login

Router(conf-t)#^z

Console password-used with direct access to console port

Router(conf-t)#line consol 0

Router(conf-t)#password Cisco

Router(conf-t)#login

Router(conf-t)#^z

Read more »

Password Recovery cisco2600

IF you are Unable to Enter in Router via telnet, or lost the password in Cisco 2600 & 2800, the Cisco has given advantage to recover the password. Now we have to bypass the start up config & Boot from the flash memory then we have to change password.

 To recover router password follow the steps:-

Step 1. Connect Router with pc throught console port & console cable.

Step 2.set up console setting.

Step 3.Reboot router

Step 4.press break key on keyboard within 60 seconds of power up in order to put router in rom mode. To bypasses the startup configuration where the passwords are stored

 Step 5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.

Step 6. Type Reset at rommon 2> prompt & router reboot

Step 7 Type Enable at router >prompt

Step 8   now u can see router# mode

Step 8 then copy starts up config to running config

Step 8 then go to configure terminal

Step 9 u redirect the router (conf-t) # then type Enable Secret Cisco123

Step 3 type confreg 0x2102 

Step10. then wr running config to start up config

Example of Password Recovery Procedure

Router>enable

Password:

Password:

Password:

% Bad secrets

Router>show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Copyright (c) 1986-1999 by cisco Systems, Inc.

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Router uptime is 3 minutes

System returned to ROM by abort at PC 0x802D0B60

System image file is "flash:c2600-is-mz.120-7.T"

cisco 2611 (MPC860) processor (revision 0x202) with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

Configuration register is 0x2102

Router>

*** System received an abort due to Break Key ***

signal= 0x3, code= 0x500, context= 0x813ac158

PC = 0x802d0b60, Vector = 0x500, SP = 0x80006030

rommon 1 > confreg 0x2142

You must reset or power cycle for new config to take effect

rommon 2 > reset

System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Copyright (c) 1999 by cisco Systems, Inc.

TAC:Home:SW:IOS:Specials for info

C2600 platform with 32768 Kbytes of main memory

program load complete, entry point: 0x80008000, size: 0x6fdb4c

Self decompressing the image : ###############################

##############################################################

##############################################################

##############################################################

############################### [OK]

 Restricted Rights Legend

Use, duplication, or disclosure by the Government is

subject to restrictions as set forth in subparagraph

(c) of the Commercial Computer Software - Restricted

Rights clause at FAR sec. 52.227-19 and subparagraph

(c) (1) (ii) of the Rights in Technical Data and Computer

Software clause at DFARS sec. 252.227-7013.

 cisco Systems, Inc.

 
170 West Tasman Drive

 San Jose, California 95134-1706

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Copyright (c) 1986-1999 by cisco Systems, Inc.

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

cisco 2611 (MPC860) processor (revision 0x202) with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

 --- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: n

Press RETURN to get started!

00:00:19: %LINK-3-UPDOWN: Interface BRI0/0, changed state to up

00:00:19: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up

00:00:19: %LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up

00:00:19: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down

00:00:19: %LINK-3-UPDOWN: Interface Serial0/1, changed state to down

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0, 

changed state to down

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0,

 changed state to up

Router>

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, 

changed state to up

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, 

changed state to down

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, 

changed state to down

00:00:50: %SYS-5-RESTART: System restarted --

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Copyright (c) 1986-1999 by cisco Systems, Inc.

Compiled Tue 07-Dec-99 02:21 by phanguye

00:00:50: %LINK-5-CHANGED: Interface BRI0/0, 

changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Ethernet0/0, 

changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Serial0/0, 

changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Ethernet0/1, 

changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Serial0/1, 

changed state to administratively down

00:00:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, 

changed state to down

00:00:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, 

changed state to down

Router>

Router>enable

Router#copy startup-config running-config

Destination filename [running-config]?

1324 bytes copied in 2.35 secs (662 bytes/sec)

Router#

00:01:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1, 

changed state to down

00:01:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:2, 

changed state to down

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#enable secret < password >

Router(config)#^Z

00:01:54: %SYS-5-CONFIG_I: Configured from console by console

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#interface Ethernet0/0

Router(config-if)#no shutdown

Router(config-if)#

00:02:14: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up

00:02:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, 

changed state to up

Router(config-if)#interface BRI0/0

Router(config-if)#no shutdown

Router(config-if)#

00:02:26: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to down

00:02:26: %LINK-3-UPDOWN: Interface BRI0/0:2, changed state to down

00:02:26: %LINK-3-UPDOWN: Interface BRI0/0, changed state to up

00:02:115964116991: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0, 

TEI 68 changed to up

Router(config-if)#^Z

Router#

00:02:35: %SYS-5-CONFIG_I: Configured from console by console

Router#copy running-config startup-config

Destination filename [startup-config]?

Building configuration...

[OK]

Router#show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Copyright (c) 1986-1999 by cisco Systems, Inc.

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Router uptime is 3 minutes

System returned to ROM by abort at PC 0x802D0B60

System image file is "flash:c2600-is-mz.120-7.T"

cisco 2611 (MPC860) processor (revision 0x202) 

with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

Configuration register is 0x2142

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#config-register 0x2102

Router(config)#^Z

00:03:20: %SYS-5-CONFIG_I: Configured from console by console

Router#show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Copyright (c) 1986-1999 by cisco Systems, Inc.

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Router uptime is 3 minutes

System returned to ROM by abort at PC 0x802D0B60

System image file is "flash:c2600-is-mz.120-7.T"

cisco 2611 (MPC860) processor (revision 0x202) 

with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

Configuration register is 0x2142 (will be 0x2102 at next reload)

Router#

Read more »

Layer Three Deivice (Router)

The layer three device is router.it's working on layer "network layer".we use router when we wanna create large network means router connect the networt.in market many company making router among that Cisco & juniper & linksys are often widely shown in network.

   

Cisco 2800 integrated router

Read more »