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July 9th, 2014 01:00
vnx5200 network reconfiguration
I have a question regarding it – specifically the networking on a VNX box.
Currently the entire box, datamovers,Control Stations and Service Processors are on the same network. This is the final configuration for this box, so we though job done. Alas life is not that simple. A proof of concept has come up and before the VNX is fully commissioned, it was proposed to be used for this proof of concept.
What this involves is putting at least the data movers into a different network. As the proof of concept involves CIFS, I need to get ntp and DNS working as a pre-requisite. The plan is to move networking wise as little as possible, i.e. simply move the data movers to an external network. I would then point data movers ntp to the C.S via the VNX private network. Point the C.S ntp to the internal network. Point the C.S DNS to the internal network. Point the DM DNS to the different network.
The problem I have relates to DNS, when I configure DM DNS, that’s fine. When I configure CS DNS via the /etc/resolv.conf that’s fine. However the DM DNS settings seem to override the /etc/resolv.conf settings, meaning DNS works on the CS until the file is overwritten and then it stops. I do not want to bridge the networks ( security concerns ). So I guess I have two questions.
Is putting the CS and SPs on one network and the DM’s on another a valid configuration ?
If it is not, is there a procedure I can follow to swap the entire VNX to a different network ?
dynamox
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July 9th, 2014 04:00
yes
dynamox
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July 9th, 2014 04:00
you just want to test File functionality on a different network ? If you don't want to delete existing interface configuration on datamovers, could you use VLAN tagging ? Create new interfaces with VLAN id, configure datamovers DNS to point to the new network, after your tests are done delete all this "new" stuff ?
cadencep45
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July 9th, 2014 04:00
Yes in theory, but what I am trying to figure out is does the DNS config for the Data movers have any impact on the CS ? i.e. if I configure DM DNS to use route via the network the DM is connected to, can I independently configure the CS DNS to use the network the CS is connected to. In this way I am not bridging networks so security are happy. The net effect is dependent on where I am generating the DNS request, It will be resolved in one of two different direction s with different name servers.
cadencep45
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July 9th, 2014 04:00
So can I change the CS DNS config via /etc/resolv.conf and DM via server_dns ?
dynamox
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July 9th, 2014 04:00
DM and CS use different DNS configurations. I have a couple of clients on my VNX that reside on a firewall-ed network that my CS does not have access to. Yet my DM have been VLAN tagged and DNS configured to point to the network where those interfaces reside.