Figure 2: Suboption Packet Formats The illustration, User-Configured Suboption Packet Formats, shows the packet formats for user-configured remote-ID and circuit-ID suboptions The switch uses these packet formats when DHCP snooping is globally enabled and when the ip dhcp snooping information option format remote-id global configuration command and the ip dhcp snooping vlan information option format-type circuit-id string interface configuration command are entered. The values for these fields in the packets change from the default values when you configure the remote-ID and circuit-ID suboptions: • Circuit-ID suboption fields • The circuit-ID type is 1.
• The length values are variable, depending on the length of the string that you configure. • Remote-ID suboption fields • The remote-ID type is 1. • The length values are variable, depending on the length of the string that you configure. Configuring DHCP Option-82 Data Insertion Configuring DHCP 6