MAC addr takeover
trockij at transmeta.com
Sat Oct 17 11:16:27 MDT 1998
On Sat, 17 Oct 1998, Cary B. O'Brien wrote:
> I said switch, I should have said router.
> I'm assuming  that you have
> a situation where you've got server A (main) and server B (backup) on the
> same lan. Server B monitors server A. If it fails to respond server B brings
> up the IP address clients use to access the service. Then it (somehow) clears
> the arp cache on the router that connects the lan with the servers to the
> outside world.
In this situation, I would hope that at least the router is smart enough
to properly update its ARP cache if a gratuitous ARP is sent out when
server B takes over. Of course my assumption that most dedicated routers
(like Ciscos) follow the ARP spec more closely than the average client
(like win95) quite possibly is incorrect :)
>  Of course, the lan itself and the router are single points of failure. Is
> this my confusion?
Are you confused by this?
More information about the Linux-HA