1.3 Creating Trunked Network Ports
To facilitate higher-bandwidth uplinks from large node-count CBB branch switches, CBBs containing a ProCurve 2848 as the branch administrative Ethernet switch require a trunked uplink to the root administrative network switch. Both the branch switch and root administrative Ethernet switches must be configured for trunking.		Back
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The HP ProCurve port trunking feature enables you to assign two or more ports to one logical link (trunk). The trunked ports then function as a single link, providing increased bandwidth. HP Cluster Platform identifies specific pairs of ports that form the trunk group. These ports are defined in the Ethernet cabling tables in Chapter 2. You need only create trunked ports if they are specified in the cabling tables for your model of HP Cluster Platform.
You do not need to perform this task during a cluster installation. The trunked ports are configured at the factory and are ready for use when a cluster is delivered to the customer site. You need only configure the trunk groups at the customer site if you are replacing a defective switch. For more information on trunking, see the information about this feature in the HP ProCurve switch documentation. To create trunked ports:
• Ensure that all port trunk links are point-to-point connections between the switches. You must configure both the link origin and destination switches for port trunking.
• Ensure that the ports on both ends of a port trunk group have the same mode (speed and duplex) and flow control settings.
• Do not enable routing on the switches.
HP Cluster Platform requires that you use the static configuration method for trunked ports. Use the Port/Trunk Settings screen in the menu interface, or use the trunk CLI command to create a static port trunk. The menu method is described in this section; see your switch documentation for other methods.
Before you begin the procedure, verify that the switch is in its default (factory) configuration and you either know or have not yet set a password. If you do not know the password, reset the switch, as described in its configuration documentation.
In its factory default configuration, the switch console starts with the command-line interface (CLI) prompt. To use its menu interface with manager privileges, go to the Manager level prompt and enter the menu command. You will use a PC’s terminal emulator with a direct serial connection to the switch’s console port, as described in the installation guide that you received with the switch.
After connecting the serial cable, begin a terminal session as follows:
1.    At the terminal, press the Enter key one or more times until the terminal displays a switch screen prompt.
2. When the switch screen appears, do one of the following:
• If a password is configured, you are prompted to enter it.
• If no password is configured, the terminal displays the CLI prompt. Go to the next step.
3. Invoke the switch’s menu interface by entering the menu command and pressing the Enter key as follows:
HPswitch# menu
4. End a menu session and activate the changes by using the menus Save option. Do not reboot the switch.
To create the trunk groups, use the following procedure on the source switch:
1.    Using the cabling tables in Chapter 2, identify the physical ports that must be trunked for your model of HP Cluster Platform and for the installed operating environment.
2. Physically disconnect all the ports you want to add to a trunk group. After you configure the trunk, you must reconnect the ports. (If you cannot physically disconnect the ports, use the switch management CLI to disable the ports.)
3. From the Main menu, choose option 2, Switch Configuration.
4. From the Switch Configuration menu, choose option 2, Port/Trunk Settings.
5. Press the E key to enter edit mode and use the arrow keys to access the port trunk parameters.
6.    Move the cursor across to the Group column, and then down to the first port that you want to add to a trunk group.
7.    Press the spacebar to choose a trunk group assignment for the selected port, such as trk1.
8.    Move the cursor to the Type column for the selected port and use the spacebar to select Trunk (This is the default type).
9.    Repeat step 7 until all the ports specified in the cabling tables are assigned to the trunk group.
10.    When you are finished assigning ports to the trunk group, press the Enter key and the S (Save) key and return to the Main menu.
11.    Repeat steps 1 through 10 for the destination switch.
12.    Connect the link cables from the origin switch to the corresponding ports on the destination switch. (If you previously disabled any of the trunked ports on the switch, enable them now.)
To verify the trunk groups, use one of the following methods:
·   Check the switch’s Event Logs to ensure that the trunk is operating properly.
·   Exit from the menu to the CLI and enter the following command:
HPswitch# show trunks
To remove an incorrect port from a trunk group, use the no trunk CLI command. The following example shows how to remove ports C4 and C5 from a trunk group:
HPswitch# no trunk c4-c5
Removing a port from a trunk can result in a loop and cause a broadcast storm. When you remove a port from a trunk on a switch that is in use, first disable the port or disconnect the link on that port.