D-Link DGS-1250 Emulator - Page 246
IP Source Guard Commands
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DGS-1250 Series Gigabit Ethernet Smart Managed Switch CLI Reference Guide 33. IP Source Guard Commands 33-1 ip verify source vlan dhcp-snooping This command is used to enable IP source guard for a port. Use the no form of this command to disable IP source guard. ip verify source vlan dhcp-snooping [ip-mac] no ip verify source vlan dhcp-snooping [ip-mac] Parameters ip-mac (Optional) Specifies to check both IP address and MAC address of the received IP packets. Default By default, this option is disabled. Command Mode Interface Configuration Mode. Usage Guideline This command is only available for physical port interface configuration. Use this command to enable the IP source guard on the configured port. When a port is enabled for IP source guard, the IP packet that arrives at the port will be validated via the port ACL. Port ACL is a hardware mechanism and its entry can come from either a manual configured entry or the DHCP snooping binding database. The packet that fails to pass the validation will be dropped. There are two types of validations. If the ip-mac parameter is not specified, the validation is based on the source IP address and VLAN check only. If the ip-mac parameter is specified, the validation is based on the source MAC address, VLAN and IP address. Example This example shows how to enable IP Source Guard on port 1. Switch# configure terminal Switch(config)# interface eth1/0/1 Switch(config-if)# ip verify source vlan dhcp-snooping Switch(config-if)# 33-2 ip source binding This command is used to create a static entry used for IP source guard. Use the no form of this command to delete a static binding entry. ip source binding MAC-ADDRESS vlan VLAN-ID IP-ADDRESS interface INTERFACE-ID [, | -] no ip source binding MAC-ADDRESS vlan VLAN-ID IP-ADDRESS interface INTERFACE-ID [, | -] 243
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