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Configuring an Extended DHCP Relay Server on EX Series Switches (CLI Procedure)

You can configure an EX Series switch to act as an extended DHCP relay agent. This means that a locally attached host can issue a DHCP request as a broadcast message and the switch configured for DHCP relay relays the message to a specified DHCP server. Configure a switch to be a DHCP relay agent if you have locally attached hosts and a remote DHCP server.

Before you begin:

  • Ensure that the switch can connect to the DHCP server.

To configure a switch to act as an extended DHCP relay agent server:

  1. Create at least one DHCP server group, which is a group of 1 through 5 DHCP server IP addresses:
    [edit forwarding-options dhcp-relay]user@switch# set server-group server-group-name ip-address
  2. Set the global active DHCP server group. The DHCP relay server relays DHCP client requests to the DHCP servers defined in the active server group:
    [edit forwarding-options dhcp-relay]user@switch# set active-server-group server-group-name
  3. Create a DHCP relay group that includes at least one interface. DHCP relay runs on the interfaces defined in DHCP groups:
    [edit forwarding-options dhcp-relay]user@switch# set group group-name interface interface-name
  4. (Optional) Configure overrides of default DHCP relay behaviors, at the global level. See the override options in the overrides statement.
    [edit forwarding-options dhcp-relay]user@switch# set overrides
  5. (Optional) Configure DHCP relay to use the DHCP vendor class identifier option (option 60) in DHCP client packets, at the global level:
    [edit forwarding-options dhcp-relay]user@switch# set relay-option option-number 60
  6. (Optional) Configure settings for a DHCP relay group that override the settings at the global level, using these statements:
    [edit forwarding-options dhcp-relay group group-name]user@switch# set active-server-group server-group-nameuser@switch# set overridesuser@switch# set relay-option option-number 60
  7. (Optional) Configure settings for a DHCP relay group interface that override the settings at the global and group levels, using these statements:
    [edit forwarding-options dhcp-relay group group-name interface interface-name]user@switch# excludeuser@switch# set overridesuser@switch# set traceuser@switch# set upto upto-interface-name
 

Related Documentation

 

Published: 2014-04-23

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