Enabling and Disabling a DHCP Client

To enable the DHCP client on a system that is already running Oracle Solaris and is not using DHCP, you must first unconfigure the system. When the system boots, you must issue some commands to set up the system and enable the DHCP client.

Note - In many deployments it is common practice to have crucial parts of the infrastructure set up with static IP addresses, rather than using DHCP. Determining which devices on your network, for example routers and certain servers, should be client and which should not, is beyond the scope of this guide.

How to Enable a DHCP Client

This procedure is necessary only if DHCPv4 was not enabled during Oracle Solaris installation. It is never necessary for DHCPv6.

Become superuser or assume a role or user name that has been assigned to the DHCP Management profile.
For more information about the DHCP Management profile, see Setting Up User Access to DHCP Commands.
Roles contain authorizations and privileged commands. For more information about roles, see Initially Configuring RBAC (Task Map) in Oracle Solaris Administration: Security Services.
Reconfigure the system.
Choose one of the following configuration methods:
- Interactively reconfigure the system.
```
# sysconfig configure
```
  When the System Configuration Interactive Tool starts, select Automatic network configuration on the Network screen.
- Non-interactively reconfigure the system.
```
# sysconfig configure -c sc_profile
```
  See the sysconfig(1M) man page for more information about using the sc_profile configuration file.

How to Disable a DHCP Client

Become superuser or assume a role or user name that has been assigned to the DHCP Management profile.
For more information about the DHCP Management profile, see Setting Up User Access to DHCP Commands.
Roles contain authorizations and privileged commands. For more information about roles, see Initially Configuring RBAC (Task Map) in Oracle Solaris Administration: Security Services.
Reconfigure the system.
Choose one of the following configuration methods:
- Interactively reconfigure the system.
```
# sysconfig configure
```
  When the System Configuration Interactive Tool starts, select either Manual or None as the network configuration on the Network screen.
- Non-interactively reconfigure the system.
```
# sysconfig configure -c sc_profile
```
  See the sysconfig(1M) man page for more information about using the sc_profile configuration file.

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