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On Thu, May 06, 2004 at 12:21:46PM -0700, Sean Roe wrote:
> Hi All,
>
> I was looking for some info on cisco catalyst switches to help speed up
> the failover between my two director boxes. I have the following setup:
>
>
> |--------|-----|WebServer1|
> -- |LVS01 |--|Cisco |-----|WebServer2|
> | | |-----|WebServer3|
> ------| |Catalyst|-----|WebServer4|
> | | |-----|WebServer5|
> -- |LVS02 |--|Switch |-----|WebServer6|
> |--------|
> Virt LVS Real
> IP Servers Servers
>
> My Problem is that if lvs01 fails lvs takes over the load but it takes
> forever for the real servers to startusing the new one (5-6 minutes).
> It also seems that it works faster if I actually restart the httpd on
> each webserver. This is a LVS-NAT with multiple vertual IPS going to
> different ports on the webservers.
>
> Any suggestions?
Sounds like there could be a problem with your gratuitous arps
that are supposed to effect failover. What software are you using to
handle this?
I have used catalyst swithces quite a lot, in fact both my
test rack and the main switch for the network here at VA Japan
used catalyst switches. I have found that they are quite aggressive
about caching ARP information, and in some cases seem to effect
proxy arp. But the current send_arp code in heartbat seems to work just
fine. Actually, I some times run that command manually after rearanging
IP addresses on machines.
--
Horms
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