Thanks, Kevin,

After a little experimenting, I narrowed it down to the Forged Transmits
setting. Once I flipped that, the nodes were able to communicate properly.

Everything working great now. I appreciate your help.


Nat Biggs
Network Analyst
Cedarville University
937-766-4156


On Thu, Nov 7, 2013 at 7:19 PM, Kevin M. <[email protected]> wrote:

>   You need to modify the security policy settings for your vlan... change
> them from reject to accept
>
> [image: image]
>
>
>  *From:* Biggs, Nathanael <[email protected]>
> *Sent:* Thursday, November 07, 2013 5:18 PM
> *To:* [email protected]
> *Subject:* [Zenloadbalancer-support] Cluster Flapping - Both are active
>
>  Hello All,
>
> I'm starting to really like ZLB -- we've started using it to handle LDAP
> traffic to some of our directory servers, and it works great.
>
> For the sake of redundancy, we've been attempting to set up a cluster with
> a second machine. All this is using VMware vSphere.
>
> However, they don't seem to be able to communicate over the virtual IP's
> that I've set aside for the cluster communication. The clustering action
> will succeed, but there will be warnings because the cluster is active on
> both machines. The machines do appear to link up and synchronize the
> cluster settings, but only one is available via the web interface.
>
> If I try to force a failover by shutting down the machine that I can
> access via the web interface, the other does not kick in.
>
> If I start the machine back up, it will cause the control of the cluster
> to flap between the two hosts.
>
> I've looked through the archives of this list for solutions, but none of
> them have worked so far -- NTP synchronization is fine, rebooting servers
> in a specific order doesn't seem to change anything, and I can even ping
> one machine from the other while all this madness is going on.
>
> Any thoughts or tips?
>
> Nat Biggs
>
>
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Accelerate application performance with scalable programming models. Explore
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from the latest Intel processors and coprocessors. See abstracts and register
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