Hello @bluesea2010
One of the fundamental measures is to implement port security to control the devices that can connect to switch ports. By limiting the number of MAC addresses per port and taking actions such as disabling a port or restricting traffic when violations occur, you can reduce the risk of MAC flooding attacks and unauthorized device connections.
Another key step is to disable unused ports and assign them to an unused VLAN to prevent unauthorized access through unused interfaces. Ensuring proper VLAN management is equally important. Avoid using VLAN 1 for management or user data traffic, and dedicate a separate VLAN for network management functions. This segmentation isolates critical management traffic from user data, reducing exposure to potential threats.
Enabling DHCP snooping adds a layer of security by preventing rogue DHCP servers from assigning IP addresses to devices on the network. This ensures that only trusted devices provide DHCP services, mitigating risks such as man-in-the-middle attacks. Similarly, implementing DAI can protect against ARP spoofing attacks, ensuring that only valid ARP traffic is allowed on the network.
Broadcast storms, multicast storms, and unicast flooding can disrupt network performance. Storm control can mitigate these issues by monitoring and limiting the traffic rate for such packets. Additionally, securing access to the switch management plane is crucial. Restrict management access using features like secure SSH for remote access, enforce strong passwords, and use role-based access control to limit user privileges...
Best regards
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