Activating Dhcp; Enabling Dhcp; Disabling Dhcp - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

Activating DHCP

By default, some HP switches have DHCP enabled; check the latest Fabric OS 6.x release notes for a
complete list of switches. The 4/256 SAN Director and DC SAN Backbone Director (short name, DC
Director) do not support DHCP.
The Fabric OS DHCP client supports the following parameters:
• External Ethernet port IP addresses and subnet masks
• Default gateway IP address
The DHCP client uses a DHCP vendor class identifier that allows DHCP servers to determine that the
Discovers and Requests are coming from a switch. The vendor class identifier is the string "BROCADE"
followed by the SWBD model number of the platform. For example, the vendor class identifier for a request
from an HP StorageWorks DC Director is "BROCADESWBD62."
IMPORTANT:

Enabling DHCP

Connect the DHCP-enabled switch to the network, power on the switch, and the switch automatically
obtains the Ethernet IP address, Ethernet subnet mask, and default gateway address from the DHCP server.
The DHCP client can only connect to a DHCP server on the same subnet as the switch. Do not enable
DHCP if the DHCP server is not on the same subnet as the switch.
Enabling DHCP after the Ethernet information has been configured releases the current Ethernet network
interface settings, including Ethernet IP, Ethernet Subnetmask, and Gateway. The Fibre Channel (FC) IP
address and subnet mask is static and is not affected by DHCP; see
page 28 for instructions on setting the FC IP address.
To enable DHCP:
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the ipaddrset command.
3. If already set up, skip the Ethernet IP address, Ethernet subnet mask, Fibre Channel IP address and
subnet mask prompts by pressing Enter.
4. When you are prompted for DHCP[Off], enable it by entering at the prompt:
switch:admin> ipaddrset
Ethernet IP Address [192.168.74.102]:
Ethernet Subnetmask [255.255.255.0]:
Fibre Channel IP Address [220.220.220.2]:
Fibre Channel Subnetmask [255.255.0.0]:
Gateway IP Address [192.168.74.1]:
DHCP [Off]:on

Disabling DHCP

When you disable DHCP, enter the static Ethernet IP address and subnet mask of the switch and default
gateway address. Otherwise, the Ethernet settings may conflict with other addresses assigned by the DHCP
server on the network.
To disable DHCP:
1. Connect to the switch and log in using an account assigned to the admin role.
2. Enter the ipaddrset command.
3. Enter the network information in dotted decimal notation for the Ethernet IP address, Ethernet
Subnetmask, and Gateway Address at the prompts. If a static Ethernet address is not available when
you disable DHCP, enter 0.0.0.0 at the Ethernet IP address prompt. Skip Fibre Channel prompts by
pressing Enter.
The client conforms to the latest IETF Draft Standard RFCs for IPv4, IPv6, and DHCP.
"Setting static Ethernet addresses" on
Fabric OS 6.1.x administrator guide 29