Hi all !\n\nWho can please give me simple explanations about IP ICMP REDIRECT ? How\ndoes it work ?\n\nI don't understand this explanation on Cisco website :\n\n"Usage Guidelines\nAn ICMP redirect message can be generated by a router when a packet is\nreceived and transmitted on the same interface. In this situation, the\nrouter will forward the original packet and send a ICMP redirect\nmessage back to the sender of the original packet. This behavior allows\nthe sender to bypass the router and forward future packets directly to\nthe destination (or a router closer to the destination).\nThere are two types of ICMP redirect messages: redirect for a host\naddress or redirect for an entire subnet.\nThe ip icmp redirect command determines the type of ICMP redirects sent\nby the system and is configured on a per system basis. Some hosts do\nnot understand ICMP subnet redirects and need the router to send out\nICMP host redirects. Use the ip icmp redirect host command to have the\nrouter send out ICMP host redirects. Use the ip icmp redirect subnet\ncommand to set the value back to the default, which is to send subnet\nredirects.\nTo prevent the router from sending ICMP redirects, use the no ip\nredirects interface configuration command"\n\n\n\nThanks !!!