Long story short, I have to deal with some "wise old men" in my team that resist change and still want separate switches for voip and data. They have this mentality from the good old times when they migrated from digital PBXs to voip but switches with vlan/lldp/cdp support were not widely available as now so they ended up with 1 switch for each service. Their only valid point is service redundancy in case of hardware failure (i.e. you still get voip if the data switch failed, and viceversa) but at cost of reducing by half the amount of available ports in the offices (i.e. a port for voip can't be used for data), increased hardware overhead, etc... how do you handle this people? in your opinion is current hardware really that unrealiable as to need 2 separate switches for voice and data?
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