Dell C1048P Port Extender Networking Command-Line Reference Guide for the C900 - Page 766

Version 9.2(1.0) 9.0.0.0 8.3.19.0 8.3.11.1 8.3.7.0 8.1.1.0 7.9.1.0 7.6.1.0 7.5.1.0 6.2.1.1 Description Introduced on the Z9500. Added support for IPv6. Introduced on the S4820T. Introduced on the Z9000. Introduced on the S4810. Introduced on the E-Series ExaScale. Introduced VRF on the E-Series. Introduced on the S-Series. Introduced on the C-Series. Introduced on the E-Series. Usage Information You can add multiple DHCP servers by entering the ip helper-address command multiple times. If multiple servers are defined, an incoming request is sent simultaneously to all configured servers and the reply is forwarded to the DHCP client. The system uses standard DHCP ports, that is UDP ports 67 (server) and 68 (client) for DHCP relay services. It listens on port 67 and if it receives a broadcast, the software converts it to unicast, and forwards to it to the DHCP-server with source port=68 and destination port=67. The server replies with source port=67, destination port=67 and the system forwards to the client with source port=67, destination port=68. ipv6 helper-address Configures the IPv6 DHCP helper addresses without VRF. C9000 Series Syntax [no] ipv6 helper-address ipv6-address To delete the ipv6 helper address, use the [no] ipv6 helper-address ipv6address command. Parameters ipv6-address Enter the keywordipv6-address through which the server address can be reached. Default Disabled. Command Modes INTERFACE 766 Dynamic Host Configuration Protocol (DHCP)