IOS Images

Naming Convention

MM

2nd M

Sample

120.10 Version 12 10th Maintenance Revision

Platform

Features

Mm= Ram with zip

Image Selection has to match-up

RAM, FLASH, DRAM

Show Version

Key 3

Show Version

Show Flash

Check with 2 show commands

TFTP Server

Free from CISCO

Freeware from Klever

TFTP Server

Download PathCreate File C:/TFTP

Copy

Copy

OLD STYLE Change Address

OLD Style

Configuration Register

Click enter

IP AddressIOS File + .BIN

Loading

Source filename c3640-ds-mz.120-10.bin

Asked to Grant Acess

Will give file not valid executable say no to abort

Erase Flash - Yes

Yes

Confirm - enter

enter

Starts loading

Error wrong file

Wrong Router IOS boot

ROM not Corruptible –RAM - yes

ROM MONITOR - Like Safe Mode

ROM CHIP – Can’t Change

Can’t Corrupt

RAM

High end routers exception –Flash Memory

Boot Image Hung – Wrong router-Move to privileged Exec mode

Copy TFTP Flash

Add IP -192.168.1.254

2500 Router selected

Select Proper Filename - Confirm

Will connect to TFTP Server

Erase Flash – Old File - Confirm

Confirm – will erase old copy new

Same process – erase then copy

Can Actually have two files that coexist

Contents + Length = Checksum

Checks sum cisco = sum from new copy

Runs through Copy then checks - Checksum

After completion reload router

reload

2500 comes up

Checks Flash first

Boot second

VS 12 Valid software

Continues loading IOS

Boot from Flash

Show running config

Remembers correct filename

Now knows filename

Review