HOW TO SAVE NETWORK FROM MAN-IN-THE-MIDDLE ATTACK(TO USING DHCP SNOOPING METHOD ON THE SWITCH)

If somebody trying to enter your network (that is MAN-IN-THE MIDDLE ATTACK)then you can use SNOOPING method on the SWITCH,
just see the Diagram....

Go to switch and configure properly...
---

MULTI_SW#conf t
MULTI_SW(config)#ip dhcp snooping
MULTI_SW(config)#int f0/1
MULTI_SW(config-if)#ip dhcp snooping trust
MULTI_SW(config)#exit
----------------------------------------------------------------------
you can see the configuration using this command on the switch
---
MULTI_SW#show ip dhcp snooping binding
-----------------------------------------------------------------------
Here,we are use cisco switches,The cisco switches use dhcp snooping  to block the MAN-IN-THE-MIDDLE attacks.
here,
MULTI_SW(config)#ip dhcp snooping
means,switch not respond to the any dhcp ARP request or any..
////////////////////
It use ip source guard that is binding with the source MAC-address
----------------------------------------------------------------------------
If you satisfied please leave the comments....Thanks