Thank you for asking this question in the support community. The NetVanta 1638 is a Layer 3 switch, without a stateful firewall; therefore, to permit/deny access you must configure hardware access-lists (ACLs). The guide Configuring Hardware ACLs in AOS will provide detailed information on how to design, configure and implement hardware ACLs. Below is a very brief sample configuration:
ip hw-access-list extended HW-BLOCK-VLANS
deny ip 126.96.36.199 0.0.0.255 188.8.131.52 0.0.0.255
deny ip 184.108.40.206 0.0.0.255 220.127.116.11 0.0.0.255
permit ip any any
forward ip HW-BLOCK-VLANS
In this basic example, traffic arriving on VLANs 3-5,10,12, with a source IP address, of 18.104.22.168/24 or 22.214.171.124/24 with a destination of 126.96.36.199/24 would be blocked, and everything else would be allowed/forwarded.
I hope that concept makes sense, but after you review the guide, please let me know if you have any additional questions. I will be happy to help in any way I can.
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