On 10/23/24 2:55 PM, Jarrod Johnson via xCAT-user wrote:
a) So the BMC config is made out of band ? This would imply 2 DHCP
servers if 1 vlan for data and 1 for BMC ?
One thing to point out, is that we may have arbitrarily many or few networks,
similar to xCAT.
Thanks again for your explanations but unfortunately you're too far
ahead for me to fully grasp the principles. I only get part of what you say.
I must miss a lot of concepts you are using.
I come from xCAT where I switch-based discover nodes by pxe-ing them
into genesis which I use to run bmcsetup to configure the BMC which
indeed is on a tagged routed vlan
In this setup I don't see how we can avoid a dynamic range (at least if
we want to be able to simultaneously discover several nodes)
What I think I understand :
1. dhcp is optional in the pxe case as pxe emitted packets are enough to
get the mac address. However pxe seems to be required for later statless
boot ?
2. discovery image (as far as BMC is concerned) is optional if BMC is
configured out of band but only if setup is simple. Ex: if BMC, as in my
case is on a routed tagged vlan you have a bootstrap problem and better
configure it inband from a discovery image or take the risk to override
it's config out of band
What I think you say:
You can get node mac adress by reading it from the BMC (which knows it)
What I don't understand:
how do you make the dynamic range not necessary ?
how do you join mac address with switch/port if nodes are off ?
What configures BMC and how ?
So basically I did not understand the steps such a discovery involve
Note: feel free to ignore this question if answer is inside docs (I just
skim throuh it very quickly)
--
Thomas HUMMEL
HPC Group
Institut PASTEUR
Paris, FRANCE
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