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Sun Ethernet Fabric Operating System

DHCP Administration Guide

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Document Information

Using This Documentation

Product Notes

Related Documentation

Acronyms and Abbreviations

CLI Command Modes

Feedback

Support and Accessibility

Protocol Description

DHCP Server

DHCP Client

DHCP Relay Agent

Configuring DHCP

Two-Switch Configuration

Multiple-Switch Configuration

Configuration Guidelines

Default Configurations

Enabling and Disabling the DHCP Server

Enable the DHCP Server

Disable the DHCP Server

Enable ICMP Echo

Specify the Amount of Time After Which an IP Address Is Made Available

Configure the Next Server

Configure the Boot File Name

Configuring DHCP Global Options

Configure DHCP Global Options

Delete DHCP Global Options

Configuring Address Pools

Configure DHCP Address Pools

Configure the End IP for the Address Pool

Configure the Lease Time

Configure the Utilization Threshold

Create an Excluded Address in the Pool

Configuring Pool-Specific Options

Configure a Domain Name Option

Configure the DNS Option

Configure the NetBIOS Name Server

Configure the NetBIOS Node Type

Configure the Default Router

Remove a Configured Default Router Subnet Option

Configure Options Specific to Address Pools

Configure Host-Specific Options

Enabling and Disabling Debug Traces for the DHCP Server

Enable Debug Traces for the DHCP Server

Disable Debug Traces for the DHCP Server

Configuring an Interface to Acquire or Use an IP Address

Configure an Interface to Acquire a Dynamic IP Address

Delete a Binding Entry From the Server

Configure an Interface to Use a Manual IP Address

Enable DHCP Relay

Configure a DHCP Server Address

Configuring Relay Agent Options

Enable the Relay Agent Information

Configure Relay Agent Suboptions

Enable Traces for the DHCP Relay Agent

Acquire an IP Address From a Server Residing Outside the Client Network

Create an Excluded Address in the Pool

You can use this option to specify a range of IP addresses that cannot be allocated for the client. The no form of the command deletes the excluded pool.

In this example, the range of excluded address pools is 12.0.0.1 through 12.0.0.10. The first available IP in this pool will be 12.0.0.11.

  1. Create the address pool.
    SEFOS# configure terminal
    SEFOS(config)# ip dhcp pool 1
  2. Specify the excluded address pool.
    SEFOS(dhcp-config)# excluded-address 12.0.0.1 12.0.0.10
    SEFOS(dhcp-config)# end
  3. View the excluded address pools.
    SEFOS# show ip dhcp server pools

    The output in switch 1 is:

    Pool Id                         : 1
    -------------------------------------------
    Subnet                          : 12.0.0.0
    Subnet Mask                     : 255.0.0.0
    Lease time                      : 95400 secs
    Utilization threshold           : 50%
    Start Ip                        : 12.0.0.1
    End Ip                          : 12.0.0.100
    Exclude Address Start IP        : 12.0.0.1
    Exclude Address End IP          : 12.0.0.10