Notes for Switched Two-Node Network

In a switchless two-node network, one scrubber jumper must be ON and the other must be OFF. In a three- or four-node network, all scrubber jumpers must be ON. This means, if you add a node to a two-node network that was originally set up without a switch, you must:

• add a switch to the network

• change the OFF scrubber jumper to ON and reboot that node

If, however, you configure the two-node network with a switch from the beginning, you will initially set all scrubber jumpers to ON. As a result, the adapter cards will be initialized to communicate through a switch from the beginning and it will not be necessary to change any scrubber jumpers when you add nodes to the network.

If you plan to do this, read the instructions for creating three- and four-node networks instead of the section on two-node networks.

The chief disadvantage to using a switch when it is not required is that the switch adds some latency that would otherwise not be in the network.