[Linux-cluster] OT: how to monitor VLAN membership

[Rajagopal Swaminathan]

Greetings,

In addition what suggestions others give, just make sure that the
cluster hearbeat ports on the switch is configured to multicast.

Regards,

Rajagopal

On 10/13/09, Gunther Schlegel <schlegel at riege.com> wrote:
> Hi,
>
> this is a bit OT, but definitely cluster-related.
>
>
> I am looking for a way to test the switch VLAN configuration from my
> RHEL5.4 cluster nodes.
>
> The cluster is running Virtual Machines as services, there is a network
> bridge for each VLAN configured on the each of the nodes. The cluster
> nodes itself have no need to access the VM's VLANs, so the bridges do
> not have any IP assigned to it. As the VMs may be migrated between the
> nodes, it is crucial that every node may use any required VLAN.
>
> While we do monitor the switch configuration, we came accross a broken
> switch, which seemed to work but did not forward some VLANs although the
> configuration was correct. I would like the nodes to test whether they
> have access to a given VLAN themselves to recognize that situation.
>
> As there are no IPs assigned to the bridges, simple ping-style tests are
> not an option. I tried to find something based on arp, but have not been
> successful yet.
>
> Any hint is highly appreciated.
>
>
> best regards, Gunther
>
> --
> Gunther Schlegel
> Manager IT Infrastructure
>
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