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39 messages in net.nether.puck.cisco-nsp[c-nsp] ARP Timeout - IP address take...| From | Sent On | Attachments |
|---|---|---|
| Lupi, Guy | Jan 19, 2005 3:43 pm | |
| Tantsura, Jeff | Jan 19, 2005 3:58 pm | |
| Dan Armstrong | Jan 19, 2005 4:15 pm | |
| Tantsura, Jeff | Jan 19, 2005 4:21 pm | |
| Stephen J. Wilcox | Jan 19, 2005 5:20 pm | |
| Lupi, Guy | Jan 19, 2005 5:28 pm | |
| Stephen J. Wilcox | Jan 19, 2005 5:35 pm | |
| Sarkis Karagozian | Jan 19, 2005 6:41 pm | |
| Vicky Rode | Jan 19, 2005 7:17 pm | |
| Ram S | Jan 19, 2005 10:45 pm | |
| Tantsura, Jeff | Jan 20, 2005 3:17 am | |
| Thomas Kernen | Jan 20, 2005 4:09 am | |
| Nic McCartney | Jan 20, 2005 4:29 am | |
| Aaron Glenn | Jan 20, 2005 4:34 am | |
| Djerk Geurts | Jan 20, 2005 4:49 am | |
| Thomas Kernen | Jan 20, 2005 7:44 am | |
| Stephen J. Wilcox | Jan 20, 2005 9:27 am | |
| Bill...@3com.com | Jan 20, 2005 10:15 am | |
| Brant I. Stevens | Jan 20, 2005 10:32 am | |
| Ziv Mosery | Jan 20, 2005 10:44 am | |
| Hudson Delbert J Contr 61 CS/SCBN | Jan 20, 2005 10:52 am | |
| Paul Stewart | Jan 20, 2005 1:39 pm | |
| Paul Stewart | Jan 20, 2005 1:47 pm | |
| MADMAN | Jan 20, 2005 2:04 pm | |
| Paul Stewart | Jan 20, 2005 2:08 pm | |
| MADMAN | Jan 20, 2005 2:44 pm | |
| Paul Stewart | Jan 20, 2005 3:05 pm | |
| Paul Stewart | Jan 21, 2005 4:46 am | |
| nick...@thomson.com | Jan 21, 2005 5:02 am | |
| Niels Bakker | Jan 21, 2005 7:06 am | |
| Stephen J. Wilcox | Jan 21, 2005 10:30 am | |
| Edward B. Dreger | Jan 22, 2005 1:57 am | |
| Paul Stewart | Jan 24, 2005 11:57 am | |
| Koen Peetermans | Jan 24, 2005 12:40 pm | |
| Serguei Bezverkhi | Jan 24, 2005 12:43 pm | |
| Paul Stewart | Jan 24, 2005 1:27 pm | |
| Charlie Winckless | Jan 24, 2005 6:47 pm | |
| Paul Stewart | Jan 24, 2005 8:07 pm | |
| Koen Peetermans | Jan 25, 2005 4:01 am |
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| Subject: | [c-nsp] ARP Timeout - IP address takeover | Actions... |
|---|---|---|
| From: | Stephen J. Wilcox (ste...@telecomplete.co.uk) | |
| Date: | Jan 21, 2005 10:30:49 am | |
| List: | net.nether.puck.cisco-nsp | |
Various systems age arp entries differently.. cisco is quite good at it tho but you will need to send out some broadcasts to ensure this happens else the devices will continue to use the old mac address until they age out and a new arp is sent.
Alternatively as I see someone else suggested you could reconfigure the mac address so that whichever machine is active uses that mac. (You'll need to figure out how to ensure both arent active at once)
Another nice way is to use a virtual IP (like you are doing) and operate a routing protocol on the servers, something simple like rip will do it or you can go for a full on quagga install and use ospf which will get failover in seconds and avoid any mac conflicts...
Steve
On Fri, 21 Jan 2005, Paul Stewart wrote:
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Hi there..
Our mail administrator is implementing a small mail cluster solution that involves using IP takeover techniques in case of failure. So, at one moment an IP could belong to one MAC address but if a box fails that IP could showup with a different MAC within seconds....
Since our core network is 100% Cisco, is there any ARP related issues that will delay our customers in seeing the proper MAC if a mail server failure should happen? Or, is there any way to control the default ARP timeout for a specific IP address?
Thanks in advance,
Paul
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