Installation guide

Section A.1:Setting Up Power Switches 153

• Assign system names to the Plug Parameters, (for example, clu1 to plug 1, clu2 to plug 2 —

assuming these are the cluster member names).

When running cluconfig to specify power switch parameters:

• Specify a switch type of

WTI_NPS.

• Specify the password you assigned to the NPS switch (refer to Step 1 in prior section).

• When prompted for the plug/port number, specify the same name as assigned in Step 3 in the prior

section.

Note

It has been observed that the NPS power switch may become unresponsive

when placed on networks which have high occurrences of broadcast or multi-

cast packets. In these cases isolating the power switch to a private subnet may

be needed.

The NPS-115 power switch has a very useful feature which can accommodate power cycling cluster

members with dual power supplies. The NPS-115 consists of 2 banks of power outlets, each of which

is independently powered and has 4 plugs. Each power plug of the NPS-115 gets plugged into a

separate power source (presumably a separate UPS). For cluster members with dual power supplies,

plug their power cords into an outlet in each bank. Then, when configuring the NPS-115 and assigning

ports, simply assign the same name to outlets in each bank that has been plugged the corresponding

cluster member. For example, suppose the cluster members were clu3 and clu4, where clu3 is plugged

into outlets 1 and 5, and clu4 is plugged into outlets 2 and 6:

-----+----------------+---------+------------+------------------+---------+

1 | clu3 | ON | 5 sec | (undefined) | ON |

2 | clu4 | ON | 5 sec | (undefined) | ON |

3 | (undefined) | ON | 5 sec | (undefined) | ON |

4 | (undefined) | ON | 5 sec | (undefined) | ON |

5 | clu3 | ON | 5 sec | (undefined) | ON |

6 | clu4 | ON | 5 sec | (undefined) | ON |

7 | (undefined) | ON | 5 sec | (undefined) | ON |

8 | (undefined) | ON | 5 sec | (undefined) | ON |

-----+----------------+---------+------------+------------------+---------+

By specifying the same name to multiple outlets, in response to a power cycle command, all outlets

with the same name will be power cycled. In this manner, a cluster member with dual power supplies

can be successfully power cycled. Under this dual configuration, the parameters specified to cluconfig

are the same as the single configuration described above.