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

[Gunther Schlegel]

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


.............................................................
Riege Software International GmbH  Fon: +49 (2159) 9148 0
Mollsfeld 10                       Fax: +49 (2159) 9148 11
40670 Meerbusch                    Web: www.riege.com
Germany                            E-Mail: schlegel at riege.com
---                                ---
Handelsregister:                   Managing Directors:
Amtsgericht Neuss HRB-NR 4207      Christian Riege
USt-ID-Nr.: DE120585842            Gabriele  Riege
                                   Johannes  Riege
.............................................................
           YOU CARE FOR FREIGHT, WE CARE FOR YOU          



-------------- next part --------------
A non-text attachment was scrubbed...
Name: schlegel.vcf
Type: text/x-vcard
Size: 346 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/linux-cluster/attachments/20091013/6cfdbf4b/attachment.vcf>