H3C S3600 Series Operation Manual

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Contents

H3C S3600 Series Operation Manual Manual pdf 56 page image

Operation Manual – DHCPH3C S3600 Series Ethernet Switches-Release 1510 Chapter 4 DHCP Snooping Configuration4-3DHCP snooping listens the following two types of packets to retrieve the IP addressesthe DHCP clients obtain from DHCP servers and the MAC addresses of the DHCPclients:z DHCP-ACK packetz DHCP-REQUEST packet4.2 DHCP Snooping ConfigurationTable 4-1 Configure the DHCP snooping functionOperation Command DescriptionEnter system view system-view —Enable the DHCPsnooping function dhcp-snoopingRequiredBy default, the DHCPsnooping function is disabled.Enter Ethernet portviewinterface interface-typeinterface-number —Set the portconnected to aDHCP server to atrusted portdhcp-snooping trustOptionalBy default, all ports of aswitch are untrusted ports.Note:When you need to enable DHCP snooping on the switches in a fabric state, configurethe fabric ports on all devices to be trusted ports to ensure that the users connected toeach device can obtain IP addresses.4.3 Displaying DHCP SnoopingAfter the above configurations, you can verify the configurations by executing thedisplay command in any view.Table 4-2 Display DHCP snoopingOperation Command DescriptionDisplay the user IP-MAC addressmapping entries recorded by theDHCP snooping functiondisplaydhcp-snooping [ unitunit-id ]Display the (enabled/disabled)state of the DHCP snoopingfunction and the trusted portsdisplaydhcp-snooping trustYou can execute thedisplay command inany view