Cisco Nexus 5000 Series Configuration Manual
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Cisco Nexus 5000 Series, Configuring IP Source Guard This chapter describes how to configure IP Source Guard on the Cisco Nexus 5000 Series switch. This chapter includes the following sections: • Information About IP Source Guard, page 1 • Licensing Requirements for IP Source Guard, page 2 • Prerequisites for IP Source Guard, page 2 • Guidelines and Limitations for IP Source Guard, page 2 • Default Settings for IP Source Guard, page 2 • Configuring IP Source Guard, page 3 • Displaying IP Source Guard Bindings, page 5 • Configuration Example for IP Source Guard, page 5 • Additional References for IP Source Guard, page 5 Information About IP Source Guard IP Source Guard is a per-interface traffic fi
Cisco Nexus 5000 Series, • IP traffic from static IP source entries that you have configured in the Cisco NX-OS device. The device permits the IP traffic when DHCP snooping adds a binding table entry for the IP address and MAC address of an IP packet or when you have configured a static IP source entry. The device drops IP packets when the IP address and MAC address of the packet do not have a binding table entry or a static IP source entry. For example, assume that : MacAddress IpAddress LeaseSec Type VLAN Interface ---------- ---------- --------- ------ ----
Cisco Nexus 5000 Series, DefaultParameters None. No static or default IP source entries exist by default. IP source entries Configuring IP Source Guard Enabling or Disabling IP Source Guard on a Layer 2 Interface You can enable or disable IP Source Guard on a Layer 2 interface. By default, IP Source Guard is disabled on all interfaces. Before You Begin Ensure that the DHCP feature is enabled. SUMMARY STEPS 1. configure terminal 2. interface ethernet slot/port 3. [no] ip verify source dhcp-snooping-vlan 4. (Optional) show running-config dhcp 5. (Optional
Cisco Nexus 5000 Series, PurposeCommand or Action (Optional) Displays the running configuration for DHCP snooping, including the IP Source Guard configuration. show running-config dhcp Example: switch(config-if)# show running-config dhcp Step 4 (Optional) Copies the running configuration to the startup configuration. copy running-config startup-config Example: switch(config-if)# copy running-config startup-config Step 5 Adding or Removing a Static IP Source Entry You can add or remove a static IP source entry on a device. By default, there are no static IP source en
PurposeCommand or Action (Optional) Copies the running configuration to the startup configuration. copy running-config startup-config Example: switch(config)# copy running-config startup-config Step 4 Displaying IP Source Guard Bindings Use the show ip verify source command to display IP-MAC address bindings. Configuration Example for IP Source Guard This example shows ho
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