Operation Manual – DHCPH3C S5100-SI/EI Series Ethernet Switches Chapter 2 DHCP Snooping Configuration2-11Note:z If you configure a remote ID sub-option in both system view and on a port, theremote ID sub-option configured on the port applies when the port receives a packet,and the global remote ID applies to other interfaces that have no remote IDsub-option configured.z If you have configured a remote ID with the vlan vlan-id argument specified, and theother one without the argument in Ethernet port view, the former remote ID appliesto the DHCP messages from the specified VLAN, while the latter one applies toDHCP messages from other VLANs.z In a port aggregation group, you can use this command to configure the primary andmember ports respectively. When Option 82 is added, however, the remote ID issubject to the one configured on the primary port.z The remote ID configured on a port will not be synchronized in the case of portaggregation.VI. Configuring the padding format for Option 82Follow these steps to configure the padding format for Option 82:To do… Use the command… RemarksEnter system view system-view —Configure thepadding formatdhcp-snoopinginformation packet-format{ extended | standard }OptionalBy default, the paddingformat is in extended format.2.2.3 Configuring IP FilteringFollow these steps to configure IP filtering:To do… Use the command… RemarksEnter system view system-view —Enter Ethernet portviewinterface interface-typeinterface-number —Enable IP filtering ip check source ip-address[ mac-address ]RequiredBy default, this function isdisabled.Create a staticbindingip source static bindingip-address ip-address[ mac-address mac-address ]OptionalBy default, no staticbinding entry is created.
