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Grouping Interfaces with Common DHCP Configurations

You use the group feature to group together a set of interfaces and then apply a common DHCP configuration to the named interface group. The extended DHCP local server and DHCP relay agent both support interface groups.

To configure an interface group:

  1. Access the [edit system services dhcp-local-server] hierarchy (for DHCP local server) or the [edit forwarding-options dhcp-relay] hierarchy (for DHCP relay agent), depending on the extended DHCP access method you want to configure. The following steps create a DHCP local server group; the steps are the same for DHCP relay agent.
  2. Create the group and assign a name.
    [edit system services dhcp-local-server]
    user@host# edit group boston

  3. Specify the names of one or more interfaces on which the extended DHCP application is enabled. You can repeat the interface interface-name statement to specify multiple interfaces within the group, but you cannot use the same interface in more than one group.
    [edit system services dhcp-local-server group boston]
    user@host# set interface fe-1/0/1.1
    user@host# set interface fe-1/0/1.2
  4. (Optional) You can use the upto option to specify a range of interfaces for a group.
    [edit system services dhcp-local-server group boston]
    user@host# set interface fe-1/0/1.3 upto fe-1/0/1.9
  5. (Optional) You can use the exclude option to exclude a specific interface or a specified range of interfaces from the group. For example:
    [edit system services dhcp-local-server group boston]
    user@host# interface fe-1/0/1.1 upto fe-1/0/1.102
    user@host# interface fe-1/0/1.6 exclude
    user@host# interface fe-1/0/1.70 upto fe-1/0/1.80 exclude
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