remote-id mac Enter the keywords remote-id mac to configure the chassis MAC address as theremote-id in option–82.circuit-id Enter the keyword circuit-id to configure the system to enable the circuit-id string inoption–82.circuit-id port Enter the keywords circuit-id port to configure the port as the circuit-is inoption-82.circuit-idhostname:portEnter the keywords circuit-id hostname:port to configure the circuit-id formatthat is sent to the server.circuit-id mac Enter the keywords circuit-id mac to configure the chassis MAC address as thecircuit-id in option–82.trust-downstream Configure the system to trust Option 82 when it is received from the previous-hop router.Defaults DisabledCommand Modes CONFIGURATIONCommand History This guide is platform-specific. For command information about other platforms, see the relevant Dell NetworkingOS Command Line Reference Guide.Version Description9.10(0.0) Introduced on the S6100-ON.9.8(1.0) Introduced on the Z9100–ON.9.8(0.0P5) Introduced on the S4048-ON.9.8(0.0P2) Introduced on the S3048-ON.9.7(0.0) Introduced on the S6000-ON.9.2(0.2) Introduced on the Z9000.8.3.19.0 Introduced on the S4820T.8.3.7.0 Introduced on the S4810.8.3.1.0 Introduced on the E-Series.7.8.1.0 Introduced on the C-Series and S-Series.ip dhcp snoopingEnable DHCP snooping globally.Syntax [no] ip dhcp snoopingDefaults DisabledCommand Modes CONFIGURATIONDynamic Host Configuration Protocol (DHCP) 561
