Connectivity Guide

Usage Information The DHCP server is available on L3 interfaces only. The no version of this command returns the value to the
default.The client-facing and server-facing interfaces must be in the same VRF.
Example (IPv4)
OS10(config)# interface eth 1/1/22
OS10(conf-if-eth1/1/22)# ip helper-address 20.1.1.1 vrf blue
Supported Releases 10.2.0E or later
ipv6 helper-address
Congure the DHCPv6 server address. Forwards UDP broadcasts received from IPv6 clients to the DHCPv6 server. You can congure
multiple helper addresses per interface by repeating the same command for each DHCPv6 server address.
Syntax
ipv6 helper-address ipv6-address [vrf vrf-name]
Parameters
• vrf vrf-name — (Optional) Enter the keyword vrf and then the name of the VRF through which the host
address can be reached.
• ipv6–address — Specify the DHCPv6 server address in the A::B format.
Defaults Disabled
Command Mode INTERFACE
Usage Information
The no version of this command deletes the IPv6 helper address.
Use this command on the interfaces where the DHCPv6 clients connect to forward the packets from clients to
DHCPv6 server and vice-versa.
Example
OS10(config)# interface ethernet 1/1/22
OS10(conf-if-eth1/1/22)# ipv6 helper-address 2001:db8:0:1:1:1:1:1 vrf blue
Supported Releases 10.4.1.0 or later
lease
Congures a lease time for the IP addresses in a pool.
Syntax
lease {infinite | days [hours] [minutes]}
Parameters
• infinite — Enter the keyword to congure a lease which never expires.
• days — Enter the number of lease days (0 to 31).
• hours — Enter the number of lease hours (0 to 23).
• minutes — Enter the number of lease minutes (0 to 59).
Default 24 hours
Command Mode DHCP-POOL
Usage Information The no version of this command removes the lease conguration.
Example
OS10(conf-dhcp-Dell)# lease 2 5 10
Example (Innite)
OS10(conf-dhcp-Dell)# lease infinite
System management 141