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HP XC System Software: Hardware Preparation Guide > Chapter 2 Making Node and Switch Connections
Switches |
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The following topics are described in this section: There are a number of switches with specialized uses in an HP XC system:
Table 2-1 lists the switch models that are supported for each use. Table 2-1 Supported Switch Models
The documentation that came with your model of ProCurve switch describes how to optionally set an administrator's password for the switch. If you define and set a password on a ProCurve switch, you must set the same password on every ProCurve switch that is a component of your HP XC system. During the hardware discovery phase of the system configuration processs, you are prompted to supply the password for the ProCurve switch administrator, and the passwords on every switch must match. A large-scale system has at least one Super Root Switch. All HP XC systems have at least one Root Administration Switch and one Root Console Switch. The number of Branch Administration Switches and Branch Console Switches depends upon the total number of nodes in your system. The Administration Network using the root and branch switches must be parallel to the Console Network root and branch switches. In other words, if a particular node uses port N on the Root Administration Switch, its management console port must be connected to port N on the Root Console Switch. If a particular node uses port N on the Branch Administration Switch, its management console port must be connected to port N on the corresponding Branch Console Switch. A graphical representation of the logical layout of the switches and nodes is shown in Figure 2-2. Figure 2-3 shows a graphical representation of the logical layout of the switches and nodes in a large-scale system with a Super Root Switch. HP xw8200 or xw9300 workstations do not have console ports. Only the Root Administration Switch supports mixing nodes without console management ports with nodes that have console management ports (that is, all other supported server models). HP workstations that are connected to the Root Administration Switch must be connected to the next lower numbered contiguous set of ports immediately before the nodes that have console management ports. For example, the workstations are connected to ports 37 and 36, and the remainder of the nodes with console management ports are connected starting at port 38 upward. Figure 2-4 shows the Super Root Switch, which is a ProCurve 2848. A Super Root switch configuration supports the use of trunking to expand the bandwidth of the connection between the Root Administration Switch and the Super Root Switch. The connection can be as simple as one wire and as complex as eight, which is the largest trunk size the ProCurve 2848 switch currently supports. See Trunking and Switch Choices for more information about trunking and the Super Root Switch. It is important to know that the trunks must be configured on both switches before plugging the cables in between the switches. Otherwise, a loop is created between the two switches. Figure 2-4 illustrates a ProCurve 2848 Super Root Switch. Ports are allocated as follows for a large-scale system with multiple regions:
The Root Administration Switch for the Administration Network of an HP XC system can be either a ProCurve 2848 switch or a ProCurve 2824 switch for small configurations. If you are using a ProCurve 2848 switch as the switch at the center of the Administration Network, use Figure 2-5 to make the appropriate port connections. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for specific purposes, described after the figure. Gray-colored ports are reserved for future use. The callouts in Figure 2-5 enumerate the following:
The ports on this switch must be allocated as follows for maximum performance:
For size-limited configurations, the ProCurve 2824 switch is an alternative Root Administration Switch. If you are using a ProCurve 2824 switch as the switch at the center of the Administration Network, use Figure 2-6 to make the appropriate port connections. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for specific purposes, described after the figure. The callouts in Figure 2-6 enumerate the following:
As a result of performance considerations, and given the number of ports available in the ProCurve 2824, the allocation order of ports is as follows:
The following switches are supported as Root Console Switches for the Console Branch of the Administration network. The Console Branch functions at a lower speed (10/100 Mbps) than the rest of the Administration network. A ProCurve 2650 switch can be used as a Root Console Switch for the Console Branch of the Administration network. The Console Branch functions at a lower speed (10/100 Mbps) than the rest of the Administration network. The ProCurve 2650 switch is shown in Figure 2-7. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for specific purposes, described after the figure. The callouts in Figure 2-7 enumerate the following:
The ports on this switch must be allocated as follows for consistency with the administration switches:
A ProCurve 2626 switch can be used as a Root Console Switch for the Console Branch of the Administration Network. The ProCurve 2626 switch is shown in Figure 2-8. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for specific purposes, described after the figure. The callouts in Figure 2-8 enumerate the following:
The ports on this switch must be allocated as follows for consistency with the administration switches:
The Branch Administration Switch of an HP XC system can be either a ProCurve 2848 switch or a ProCurve 2824 switch. Figure 2-9 shows the ProCurve 2848 switch. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for specific purposes, described after the figure. The callouts in Figure 2-9 enumerate the following:
The ports on this switch must be allocated as follows for maximum performance:
The ProCurve 2824 switch is shown in Figure 2-10. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for a specific purposes, described after the figure. The callout in Figure 2-10 “ProCurve 2824 Branch Administration Switch” enumerates the following:
The ports on this switch must be allocated as follows for maximum performance:
The Branch Console Switch of an HP XC system is a ProCurve 2650 switch. The connections to the ports must parallel the connections of the corresponding Branch Administration Switch. If a particular node uses port N on a Branch Administration Switch, its management console port must be connected to port N on the corresponding Branch Console Switch. Figure 2-11 shows the ProCurve 2650 switch. In the figure, white ports should not have connections, black ports can have connections, and ports with numbered callouts are used for a specific purpose, described after the figure. The callout in Figure 2-11 enumerates the following:
The ports on this switch must be allocated as follows for maximum performance:
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