Sometime I need to analyze network traffic from remote switch. Thus RSPAN is life saver. Go to the site and capturing the packets and analyze the packets is very time consuming. So here a small tutorial which explain how to configure packets with RSPAN.

SW1(This is the remote switch, Which is the source for our packets.)

sw1(config)#vlan 444
sw1(config-vlan)#remote-span
sw1(config)#monitor session 1 source interface Fa1/0/1 - 16
sw1(config)#monitor session 1 destination remote vlan 444



SW2(The destination switch where you going sniff the packets send my remote switch on case sw1.)
sw2(config)#vlan 444
sw2(config-vlan)#name RSPAN_VLAN
sw2(config-vlan)#remote-span

sw2(config)#monitor session 1 destination interface Gi0/17
sw2(config)#monitor session 1 source remote vlan 444

Now you can capture remote packets in port 17.

All these tutorial tested on cisco 3750 switch.

Step1:
Fist of all create tftp server in one of the updated IOS switch.
sw2(config)#tftp-server c2950-i6k2l2q4-mz.121-22.EA14.bin

Step2:
Then go to the remote switch where you want to upgrade IOS with new version.

sw1#copy tftp: flash:
Address or name of remote host [100.100.255.47]?
Source filename [100.100.255.47]? c2950-i6k2l2q4-mz.121-22.EA14.bin
Destination filename [c2950-i6k2l2q4-mz.121-22.EA14.bin]?
Accessing tftp://100.100.255.47/c2950-i6k2l2q4-mz.121-22.EA14.bin...
Loading c2950-i6k2l2q4-mz.121-22.EA14.bin from 100.100.255.47 (via Vlan2): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 3722814 bytes]

3722814 bytes copied in 143.124 secs (26011 bytes/sec)

Step3.
Check your copied IOS in the switch.

sw1(config)#do dir flash:
Directory of flash:/

    2  -rwx         864  Mar 01 1993 05:45:31 +05:45  vlan.dat
    3  -rwx       13499  Sep 23 2014 22:17:39 +05:45  config.text
    4  -rwx        1952  Sep 23 2014 22:17:39 +05:45  private-config.text
    5  -rwx     3722112  Mar 01 1993 07:33:24 +05:45  c2950-i6k2l2q4-mz.121-22.EA12
    6  -rwx        5871  Mar 01 1993 06:18:00 +05:45  sw1-config
    7  -rwx          43  Mar 01 1993 07:37:36 +05:45  env_vars
    8  -rwx     3722814  Sep 24 2014 12:30:41 +05:45  c2950-i6k2l2q4-mz.121-22.EA14.bin
  305  -rwx        5168  Mar 01 1993 08:37:25 +05:45  running-config1
  306  -rwx        1048  Sep 23 2014 22:17:39 +05:45  multiple-fs

7741440 bytes total (263680 bytes free)

Step5.
Verify the IOS if corrupted while copying form remote system to the destination system.

sw1#verify /md5 flash:c2950-i6k2l2q4-mz.121-22.EA14.bin
.............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................Done!
verify /md5 (flash:c2950-i6k2l2q4-mz.121-22.EA14.bin) = 8d3250ee253b81b7fe2762e281773fbc

Step6.
Now boot system

sw1(config)#boot system c2950-i6k2l2q4-mz.121-22.EA14.bin

Step7.
Write into the memory, otherwise your system may not boot from the new IOS or if you removed working IOS you system may not found any IOS.

sw1#wr memory
Building configuration...
[OK]

sw1#reload
System configuration has been modified. Save? [yes/no]: y
Building configuration...
[OK]

Step8.
Now check your system boot from new IOS

sw1#sh ver | inc image
System image file is "flash:/c2950-i6k2l2q4-mz.121-22.EA14"
Proceed with reload? [confirm]

How to recover extra space in 2950 switch.

In case you may have little space in switch, your new IOS have "3722814" size and switch only left "2220544" bytes free, in my case I don't need html file so I delete it form the switch.
sw1#dir flash:
Directory of flash:/

    2  -rwx     3722112  Apr 08 2013 11:13:12 +05:45  c2950-i6k2l2q4-mz.121-22.EA12
    3  -rwx         796  Mar 01 1993 05:45:28 +05:45  vlan.dat
    4  drwx        4224  Mar 14 2008 11:52:14 +05:45  html
   79  -rwx        1048  Sep 23 2014 17:05:12 +05:45  multiple-fs
   81  -rwx       12534  Sep 23 2014 17:05:12 +05:45  config.text
   83  -rwx        1958  Sep 23 2014 17:05:12 +05:45  private-config.text

7741440 bytes total (2220544 bytes free)

sw1#delete /f /r flash:html
Delete filename [html]? 

This tutorial assumed you already create Hotspot in your router. If you don't know how to create a hotspot in Mikrotik router, click here and create the Hotspot. .

After successfully creating the hotspot server go to "Files" Menu of  the main Window of Mikrotik router Copy "hotspot" folder into your PC.

1. The following instructions appear:
  The system has been interrupted prior to initializing the
   flash filesystem.  The following commands will initialize
   the flash filesystem, and finish loading the operating
   system software:
       flash_init
       load_helper
       boot
   switch:

2. Now follow the following command

switch: flash_init
switch: dir flash
switch: rename flash:config.text flash:config.old
switch: boot

3. Enter "n" at the prompt to start the setup program

--- System Configuration Dialog ---
   At any point you may enter a question mark '?' for help.
   Use ctrl-c to abort configuration dialog at any prompt.
   Default settings are in square brackets '[]'.
   Continue with configuration dialog? [yes/no]: n

    !--- Press Return or Enter.
 
    Switch>
 
    !--- The Switch> prompt is displayed.

      switch>en
      switch#

4. Type rename flash:config.old flash:config.text to rename the configuration file with its original name.

    Switch#rename flash:config.old flash:config.text
                Destination filename [config.text]
    Switch#

5. Copy the configuration file into memory

       Switch#copy flash:config.text system:running-config

6. Change the password


      Switch#configure terminal
      Switch(config)#no enable secret
      Switch(config)#enable secret Cisco
      Switch(config)#end

7. Write the into the memory.

          Switch#write memory
                 Building configuration...
                 [OK]
        Switch#