Hi All, I am having a scenario wherein an IP address is transferred from one processor to another in case of a failure. These two processors are in communication with a central server, and frequently send out GARPs to update their details. Consider the processors X and Y which report to server Z. Processor X had the IP, and sent out a GARP at 't' second. The server Z updated the ip and mac addresses of processor X. Processor X rebooted immediately, and therefore the ip address got transferred to processor Y within 300-400 milliseconds. Now processor Y sends out a GARP immediately within 't+1' second, and since the interval has not crossed 1 second threshold, this GARP is ignored by the server. Hence there is a loss of traffic until the ARP cache is refreshed in the server, and the older entry is deleted, before the new request is considered. This happens due to a condition specified in net/ipv4/arp.c /* If several different ARP replies follows back-to-back, use the FIRST one. It is possible, if several proxy agents are active. Taking the first reply prevents arp trashing and chooses the fastest router. */ override = time_after(jiffies, n->updated + n->parms->locktime); ==============> n->params->locktime being one second /* Broadcast replies and request packets do not assert neighbour reachability. */ if (arp->ar_op != htons(ARPOP_REPLY) || skb->pkt_type != PACKET_HOST) state = NUD_STALE; neigh_update(n, sha, state, override ? NEIGH_UPDATE_F_OVERRIDE : 0); neigh_release(n); The above condition is for ignoring the arps from proxies, but in my case, the GARPs which is not from a proxy are also ignored. I think this condition is breaking the functionality under the scenario I explained. Or is there any other reason for this condition, and I am missing it? P.S: I came across a similar post on the net, but there wasn't any solution provided :( Regards, Sowmya =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you