What the stale state "covers"? What is behind this question? Rgds Milos

Description of Address Resolution Protocol (ARP) caching behavior in Windows Vista TCP/IP implementations Therefore, the "Reachable Time" value is somewhere between 15 seconds (30 0.5 seconds) and 45 seconds (30 1.5 seconds). If an entry is not used for a time between 15 to 45 seconds, it changes to the "Stale" state. Then, the host must send an ARP Request for IPV4 to the network when any IP datagram is sent to that destination. Microsoft says ARP caching behavior above paragraph. How do I send an ARP Request for IPv4 to the network, at that stale state ?

Hi, Please check out the following value: ArpRetryCount Key: Tcpip\Parameters Value Type: REG_DWORDNumber Valid Range: 03 Default: 3 Description: This value controls the number of times that the computer sends a gratuitous Address Resolution Protocol (ARP) Request message for its own IPv4 address(es) while initializing. Gratuitous ARP requests are sent to ensure that the IPv4 address is not already in use on the locally attached subnet. The value controls the actual number of ARP requests sent, not the number of retries. For more information about TCP/IP registry values for Windows Vista and for Windows Server 2008, visit the following Web site: http://download.microsoft.com/download/c/2/6/c26893a6-46c7-4b5c-b287-830216597340/TCPIP_Reg.docTracy Cai TechNet Community Support

Hi, Please check out the following value: ArpRetryCount Key: Tcpip\Parameters Value Type: REG_DWORDNumber Valid Range: 03 Default: 3 Description: This value controls the number of times that the computer sends a gratuitous Address Resolution Protocol (ARP) Request message for its own IPv4 address(es) while initializing. Gratuitous ARP requests are sent to ensure that the IPv4 address is not already in use on the locally attached subnet. The value controls the actual number of ARP requests sent, not the number of retries. For more information about TCP/IP registry values for Windows Vista and for Windows Server 2008, visit the following Web site: http://download.microsoft.com/download/c/2/6/c26893a6-46c7-4b5c-b287-830216597340/TCPIP_Reg.docTracy Cai TechNet Community Support

What the stale state "covers"? What is behind this question? Rgds Milos

This should automatically be handled when the next packet needs to be sent to the destination. Do you have something in your network that is blocking ARP requests or are you receiving some sort of other error? -- Mike Burr Mike's Technology and Finance Blog Learn to Troubleshoot Windows BSODs