ccnp route 642-902

there is a small change in redistribution simulation

after configure redistribution btwn eigrp and ospf in R2 and R3 .Then configure Ad value to select the best to the network 172.16.100.0/24 from Router2 .Here the best path is R1>R2>R3>R4 but R2 forward the traffic to 192.168.3.1(direct to r4 ) b cos the other path hving highest ad of external eigrp (170) so we should decrease the ad value of externel eigrp using

following commd

router eigrp 100

distance eigrp 90(internel) 105(external)

Recover ios in a cisco router

Recover IOS using tftpdnld from ROMMON

In Cisco 2600/2800/3800 Series Router we can recover IOS using Trivial File Transfer Protocol (TFTP) over ethernet interface using the ROMmon tftpdnld command.
tfptdnld is more faster rather than recovering IOS via Xmodem.

rommon 1 > IP_ADDRESS=10.0.0.1 //The IP address for this unit

rommon 2 > IP_SUBNET_MASK=255.255.255.0 //The subnet mask for this unit

rommon 3 > DEFAULT_GATEWAY=10.0.0.13 //The default gateway for this unit
rommon 4 > TFTP_SERVER=10.0.0.13 //The IP address of the server to fetch from
rommon 5 > TFTP_FILE=c3845-adventerprisek9-mz.124-21.bin //The ios image file
rommon 6 > tftpdnld //this is the command

WARNING: all existing data in all partitions on flash will be lost!
Do you wish to continue? y/n: [n]: y

my facebook

http://www.facebook.com/renjinar

disable password recovery in cisco routers

we can disable password recovery by using a comand
"no service password recovery" in configuration mode.

its a hidden command

password recovery in cisco routers

password recovery for 2600/2800

1.Attach a PC with terminal emulation to the console port of the router.

2.power on the router

3.Press cntrl + Break on the terminal keyboard within 60 seconds of power up in order to put the router into ROMmon mode.

4.change configuration register value from 2102 to 0x2142

command : >confreg 0x2142

5.then reboot the router >reset

The router reboots, but ignores the saved configuration

6. enter in to the enable mode. Should see the Router# prompt

7.Type configure memory or copy startup−config running−config in order to copy the nonvolatile

RAM (NVRAM) into memory.

Warning: Do not type copy running−config startup−config or write. These commands erase

your startup configuration.

8.enter in to the config mode

9.then change the passwords (enable secret,console pwd etc..)

10 change the config reg value to 0x2102

using command R1(config)#config-register 0x2102

11. save the configuration

using command R1#write or R1#copy run start

windows 7 no more suport hyperterminal

you can use
teraterm,putty or download hyperterminal private edition using the following link
http://www.4shared.com/get/OgGu4EeR/HyperTerminal_63.html

Improve your subnetting skills

try the following questions and then reveal answers
http://www.subnettingquestions.com/