Ooh, good idea about setting the MAC address. I'll have to check into that. We all know it works with token ring interfaces but I'd never played with it on an ethernet interface.
This subnet contains Windows workstations, Windows servers, Novell servers, and Solaris servers so we'll probably see a range of behaviors. Thanks, John >>> "Kevin Cullimore" 8/19/02 6:17:34 PM >>> Does this network contain servers? workstations? Both? If the end-systems are running operating systems from the Northwestern United States, you could push down a registry change involving the arp cache timer. If they are dhcp clients, option 35 is supposed to be associated with that timer as well (I don't have equipment available to test with). I'm not sure if there's a way to alter the mac address associated with the gateway address on the 6513 (documented or otherwise), but if there is, and you're removing the router from that network, that might be an option as well. ----- Original Message ----- From: "John Neiberger" To: Sent: 19 August 2002 5:13 pm Subject: How to force a gratuitous ARP [7:51674] > I'm planning on moving routing responsibilities from a router to our > 6513 and I *really* need to minimize downtime. I'll be moving an > interface IP address from one device to another and this is the default > gateway for all devices on that network. The problem is that all > devices on that subnet will have the wrong MAC address in their ARP > caches. I know that if I issue a unicast ping from the new router it > will force the end host to update its ARP cache but a broadcast ping > does not accomplish the same thing, probably because most devices ignore > a broadcast ping, and I don't feel like pinging every device > individually. > > I can't configure HSRP just to gain the benefit of gratuitous ARP; > simply configuring it will be disruptive and that's what I'm trying to > avoid. > > Any ideas? > > Thanks, > John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51739&t=51674 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
