Dell Force10 S4820T FTOS Command Reference Guide - Page 696

www.dell.com | support.dell.com Parameters Defaults Command Modes Command History Usage Information ip-address default-vrf Enter an IP address in dotted decimal format (A.B.C.D). (Optional) E-Series Only: Enter default-vrf for the DHCP server VRF is using. Not configured. INTERFACE Version 8.3.19.0 Version 8.3.7.0 Version 8.1.1.0 Version 7.9.1.0 Version 7.6.1.0 Version 7.5.1.0 pre-Version 6.2.1.1 Introduced on S4820T Introduced on S4810 Introduced on E-Series ExaScale Introduced VRF on the E-Series Added support for S-Series Added support for C-Series Introduced on E-Series 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. FTOS 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 FTOS forwards to the client with source port=67, destination port=68. ip helper-address hop-count disable c e s Disable the hop-count increment for the DHCP relay agent. Syntax Defaults Command Modes ip helper-address hop-count disable To re-enable the hop-count increment, use the no ip helper-address hop-count disable command. Enabled; the hops field in the DHCP message header is incremented by default CONFIGURATION 696 | IPv4 Routing