We use the Raritan KSX serial "KVM". It works well enough, although we did have a problem initially with cables for devices that use an RJ-45 connector rather than DB-9 (like that for the NetApp).
Are two routers enough for practicing CCNA skills in your home lab? Maybe, maybe not. But you can practice a surprising number of CCNA-level router tasks with a two-router lab using the topology ...
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