Skip to main content

Intermittent connectivity problems

Use this information to solve intermittent connectivity problems.

Single compute node cannot connect intermittently​

Complete the following steps until the problem is solved.
  1. Make sure that the network cables are correctly connected in the switch module ports and the switch module is correctly seated.
  2. Update the NIC device driver, or the storage device controller device driver.
  3. See the documentation for the I/O module for resolving connectivity issues.

Two or more compute nodes cannot connect intermittently​

Complete the following steps until the problem is solved.
  1. Using the diagnostic tools that are provided by the device manufacturer, test the I/O module that the devices are connected to.
  2. Attempt to connect one compute node to the network first, and connect other compute nodes, one by one, to try to isolate the problem.
  3. Update the I/O module firmware, if necessary.
    Note
    Restarting the compute node and running POST diagnostics on the I/O module might also help isolate the problem; however, this might have other ramifications to the network.