Sorry for the late reply
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I'm the network administrator for a Romanian university and decided to choose endian for our CAMPUS.
After I finish the deployment over the whole campus I think we are going to have easily 10.000+ users spread over the servers. We have 20.000 students for now.
For now we are using the servers only for dhcp + some filtering but I'm planning to do a nice setup to keep under control the masses
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Best regards.