Cisco Cisco SG500-52PP 52-port Gigabit Max PoE+ Stackable Managed Switch 技术参考

DHCPv6 Commands

78-21491-01 Command Line Interface Reference Guide

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Command Mode

Interface configuration (config-if).

User Guidelines

The ipv6 dhcp client information refresh minimum command specifies the 
minimum acceptable information refresh time. If the server sends an information 
refresh time option of less than the configured minimum refresh time, the 
configured minimum refresh time will be used instead.

This command may be configured in several situations:

    • In unstable environments where unexpected changes are likely to occur.

    • For planned changes, including renumbering. An administrator can gradually 

decrease the time as the planned event nears.

    • Limit the amount of time before new services or servers are available to the 

client, such as the addition of a new Simple Network Time Protocol (SNTP) 
server or a change of address of a Domain Name System (DNS) server.

If you configure the infinite keyword client never refreshes the information. 

Example 

The following example configures an upper limit of 2 days:

interface vlan 100

  ipv6 dhcp client stateless

 ipv6 dhcp client information refresh 172800

exit

Use the ipv6 dhcp duid-en command in Global Configuration mode to set the 
Vendor Based on Enterprise Number DHVPv6 Unique Identified (DUID-EN) format.

To return to the default value, use the no form of this command.

Syntax

ipv6 dhcp duid-en 

enterprise-number identifier

no ipv6 dhcp duid-en