[Linux-cluster] rhel 6.2 network bonding interface in cluster environment
ajb2 at mssl.ucl.ac.uk
Mon Jan 9 14:14:46 UTC 2012
On 09/01/12 13:33, Rajagopal Swaminathan wrote:
>> Switches used for this purpose are best completely isolated from the rest of
>> the network and multicast traffic control should be DISABLED.
> I distinctly remember asking the network guys Multicast mode to be on
> for the Heartbeat network (for the clusters that I have built).
You need multicast.
What you don't want, is any form of filtering based on packet rates
(broadcast/multicast rate limiting). This gets in the way.
I can't emphasise enough that the heartbeat equipment is best separated
from everything else. A spanning tree rebuild initiated elsewhere in the
LAN may be enough to cause an outage long enough to generate a fence event
(Ethernet fabric switching is spreading, but spanning tree will be
around for quite a while yet)
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