Enable DHCP relay

You must select which interfaces perform DHCP relay. Activate the relay on the interface toward the DHCP clients.

Steps

  1. Right-click a SMCaaS, then select Edit <element type>.
  2. Browse to Interfaces.
  3. Right-click a physical, VLAN, or Port Group interface, then select Edit <interface type>.
    • When configuring VLAN interfaces, set the DHCP relay separately for each VLAN.
    • When configuring Port Group interfaces, set the DHCP relay separately for each Port Group.
  4. Enable IPv4 DHCP relay, IPv6 DHCP relay, or both.
    • On the DHCPv4 tab, select DHCPv4 Relay from the DHCP Mode drop-down list.
    • On the DHCPv6 tab, select DHCPv6 Relay from the DHCP Mode drop-down list.
  5. On each tab where you enabled DHCP relay, select the DHCP server from the list of servers on the left, then click Add.
  6. (Optional) From the DHCP Relay drop-down list, select the CVI or IP address that you want to use for DHCP Relay.
  7. Click OK.
  8. (Optional) Allow connections from interfaces on which DHCP relay is active to remote DHCP servers using automatic rules.
    1. Browse to Policies > Automatic Rules.
    2. Next to Allow Connections from Local DHCP Relay to Remote DHCP Server, select Yes.
    Note: To relay DHCP messages through a policy-based VPN, you must add specific Access rules to allow the traffic. The Access rules must refer to the correct policy-based VPN.
  9. Click Save to save and validate changes.