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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: | nick...@thomson.com (nick...@thomson.com) | |
| Date: | Jan 21, 2005 5:02:26 am | |
| List: | net.nether.puck.cisco-nsp | |
-----Original Message----- From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Paul Stewart Sent: Friday, January 21, 2005 10:47 AM To: cisco-nsp at puck.nether.net Subject: [c-nsp] ARP Timeout - IP address takeover
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
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,
Not really an answer, but we are currently using 2 different cluster mechanisms:
1) hot failover clusters with virtual mac addresses. When one of the nodes fails the other takes over it's IP and it's MAC addresses. Easy on routers because the MAC address doesn't change, and a CAM update on the switches is near instantanious as well. 2) cold failover with virtual IPs but real MAC addresses. Here we just make sure that when one of the machines takes over we send out a few arpings to the router to force the MAC update. This is on various unixes, I don't know how one can do this under windows.
// nick