Rockwell Automation 1783-Mxxx Stratix 8000 and 8300 Ethernet Managed Switches User Manual - Manual (Page 170)

170 Rockwell Automation Publication 1783-UM003I-EN-P - March 2014
Chapter 6 Troubleshoot the Switch
Device Manager Web
Interface Issues Following are some basic troubleshooting for issues related to displaying the
Device Manager Web interface.
Switch Performance Following are some basic troubleshooting for issues related to switch
performance.
Table 22 - Device Manager Web Interface Issues
Issue Resolution
Device Manager Web interface does not appear If you cannot display the Device Manager Web interface from your computer or laptop, make sure that you entered the
correct switch IP address in the browser.
If you entered the correct switch IP address in the browser, make sure that the switch and your computer or laptop are in
the same network or subnetwork:
• If your switch IP address is 172.20.20.85 and your computer or laptop IP address is 172.20.20.84, both devices are in
the same network.
• If your switch IP address is 172.20.20.85 and your computer or laptop IP address is 10.0.0.2, the devices are in different
networks and cannot directly communicate without a router. You must either change the switch IP address or change
the computer or laptop IP address.
• If the issue persists, follow the procedure in the Access Direct Managed Mode section on page 171 , and then update
the switch network settings on the device manager Express Setup window.
• If the issue still persists, follow the procedure in the Recover the Switch Firmware and Restore Factory Defaults section
on page 173 .
Device Manager Web interface is not operating properly If the Device Manager Web interface does not operate properly (for instance, the device manager is not responding),
follow the procedure in the
Access Direct Managed Mode section on page 171 , and then update the switch network
settings on the Device Manager Web interface Express Setup window.
If the issue persists, follow the procedure in the
Recover the Switch Firmware and Restore Factory Defaults section on
page 173 .
Device Manager Web interface is not accessible through
the network If you cannot access the device manager remotely from a web browser, follow the procedure in the Access Direct Managed
Mode section on page 171 .
Table 23 - Switch Performance
Issue Resolution
Speed, Duplex, and Autonegotiation If the port statistics show a large amount of alignment errors, frame check sequence (FCS), or late-collisions errors, this
can indicate a speed or duplex mismatch.
A common issue with speed and duplex occurs when the duplex settings are mismatched between two switches,
between a switch and a router, or between the switch and a workstation or server. This can happen when manually
setting the speed and duplex or from autonegotiation issues between the two devices. A mismatch occurs under these
circumstances:
• A manually set speed or duplex parameter is different from the manually set speed or duplex parameter on the
connected port.
• A port is set to autonegotiate, and the connected port is set to Full-duplex with no autonegotiation.
To maximize switch performance and be sure of a link, follow one of these guidelines when changing the settings for
duplex and speed:
• Let both ports autonegotiate both speed and duplex.
• Manually set the same speed and duplex parameters for the ports on both ends of the connection to the same values.
• If a remote device does not autonegotiate, configure the duplex settings on the two ports to the same values.
The speed parameter can adjust itself even if the connected port does not autonegotiate.
Autonegotiation and network interface cards (NICs) Issues sometimes occur between the switch and third-party network interface cards (NICs). By default, the switch ports
and interfaces are set to autonegotiate. It is common for devices like laptops or other devices to be set to autonegotiate
as well, yet sometimes autonegotiation issues occur.
To troubleshoot autonegotiation issues, try manually setting both sides of the connection. If this does not solve the issue,
there could be an issue with the firmware or software on your NIC. You can resolve this by upgrading the NIC driver.
Cabling distance If the port statistics show excessive FCS, late-collision, or alignment errors, verify that the cable distance from the switch
to the connected device meets the recommended guidelines.