First thoughts: You seem to be removing the Netgear Router altogether – Ifit still works as a router and/or firewall, why not keep it either in production, or as a back-up?
The proposed equipment is ok, just a few points to make it easier:
– Mirror the Internal IP address settings of the Netgear on the Cisco Router: All devices / DHCP scopes probably have it as a gateway, so use it
– Ensure that the ASA supports the same types of VPN connections (if any) that the Netgear does. Possibly replicate user settings from one device to the next
– Keep VLANs / Subnets, IP routing and functions as similar as possible, and it sounds like a fairly painless transition…
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