Rockwell Automation 1783-Mxxx Stratix 8000 and 8300 Ethernet Managed Switches User Manual - Manual (Page 42)

42 Rockwell Automation Publication 1783-UM003I-EN-P - March 2014
Chapter 1 Install the Switch
Link Status
Verify that both sides have a network link. A single broken wire or one shut down
port can cause one side to show a link, but not the other side. A Link status
indicator does not guarantee that the cable is fully functional. The cable can
encounter physical stress that causes it to function at a marginal level. If the Link
status indicator for the port is not lit, do the following:
• Connect the cable from the switch to a known good device.
• Make sure that both ends of the cable are connected to the correct ports.
• Verify that both devices have power.
• Verify that you are using the correct cable type.
• Rule out loose connections. Sometimes a cable appears to be seated, but is
not. Disconnect the cable, and then reconnect it.
Transceiver Issues
Use only Rockwell Automation SFP modules on the switch. Each SFP module
has an internal serial EEPROM that is encoded with security information. This
encoding identifies and validates that the module meets the requirements for the
switch. Other manufacturers’ SFP modules do not function correctly.
Check these items:
• Verify that the SFP module is valid and functional. Exchange a suspect
module with a known good module. Verify that the module is supported
on this platform.
• Use the CLI show interfaces command or the CLI show int status
command to verify the error-disabled or shutdown status of the port or
module. Re-enable the port if needed.
• Make sure that all fiber connections are properly cleaned and securely
connected.
Port and Interface Settings
A cause of port connectivity failure can be a disabled port. Verify that the port or
interface is not disabled or powered down for some reason. If a port or interface is
manually shut down on one side of the link or the other side, the link does not
come up until you re-enable the port. Use the CLI show interfaces privileged
EXEC command to verify the port or interface error-disabled, disabled, or
shutdown status on both sides of the connection. If needed, re-enable the port or
the interface.