Hi, While recv a ARP req to its IP, a linux machine responds with a ARP response, but not updating its ARP cache. Why is this behaviour? As per RFC if the ARP req is for the interface's protocol address, it has to update the src protocol address, source hardware address it in its ARP cache. This is a violation of RFC right. Actually tried to ping the linux box. Initially after recv the ARP req linux responds with ARP reply and replies to further ICMP packets. But it also initiates a fresh ARP request to the host. When tested with one icmp echo pkt, it happened at the end of the icmp echo pkt reply. With 4 pkts also at the end it happened. With 100 pkts it happens at random intervals. Is there any specific recommendations for hosts? because i tried the same with a Cisco router which does not freshly initiates a ARP request packet after ICMP echo replies. So when does the ARP cache is updated in linux machine. My kernel version is 2.4.18-3. Any reasons for this behaviour? Thanks, Rmsh. -- http://www.hcltech.com/voip - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
