A group interface configured as DHCPv4 Relay or DHCPv4 Proxy ignores the Parameter Request List Option (55) in DHCPv4 client messages and always inserts a Domain Name Server Option (6), a NetBIOS Name Server Option (44), or both in the DHCP Offer and DHCP Ack message when at least one DNS or NBNS name server IP address or both is received during authentication.