Configure ARP rate limiting based on source MAC addresses and source IP addresses to prevent a large number of ARP packets with fixed source MAC address or IP address sent by attackers. Create VLANs, ...
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Core Switch ARP Prevention - SMB AI-Systems & High-Speed Interconnect [PDF]
This example will instruct the administrator on how to configure the switch to protect the network from attackers using the same IP Addresses of core network components (ex. servers or gateways).
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AnARPspoofingattackcanaffecthosts,switches,androutersconnectedtoyournetworkbyfloodingpackets totheCPUofthedevicesconnectedtothesubnetandthusaffectingdeviceperformance.FloodingtheCPU
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Configure ARP rate limiting based on source MAC addresses and source IP addresses to prevent a large number of ARP packets with fixed source MAC address or IP address sent by attackers. Create
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In this way, if a legitimate user obtains an IP address and then tries to perform ARP spoofing, or if an illegal user privately configures astatic IP address, their ARP checks will fail and
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On the VLAN interfaces of a routing switch, dynamic ARP protection ensures that only valid ARP requests and responses are relayed or used to update the local ARP cache.
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So to prevent arp poisoning / arp spoofing attacks, would it be best to apply this at the core, or at the edge? We have all Cisco 3750''s at our edge terminating the end users/phones (dhcp),
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Configure ARP rate limiting: ARP rate limiting is a feature that limits the number of ARP packets that can be sent by a device in a certain time period. You can configure ARP rate limiting on
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To protect the switch from IP packet attacks, you can enable the ARP source suppression function or ARP black hole routing function. If the packets have the same source address, you can enable the
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With this configuration, all ARP packets that enter the network from a device bypass the security check. No other validation is needed at any other place in the VLAN or in the network. Use
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AXARPS can avoid missing pairs of IP and MAC addresses by monitoring all ARP traffic instead of the traditional method. AXARPS also can reduce a CPU load on a recent high-end core
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