Chapter 11: Troubleshooting
176
Solutions:
Try the following:
Check that the transceiver is fully inserted in the port.
Verify that the fiber optic cable is securely connected to the port on
the transceiver and the remote network device.
Verify that the remote network device is operating properly.
Verify that the operating specifications of the fiber optic ports on
the transceiver and remote network device are compatible.
Verify that the correct type of fiber optic cabling is being used.
Verify that the port is connected to the correct fiber optic cable.
Try connecting another network device to the fiber optic port using
a different cable. If the port is able to establish a link, then the
problem is with the cable or with the other network device.
Use the switch’s management software to verify that the port is
enabled.
If the remote network device is a managed device, use its
management firmware to determine whether its port is enabled.
If the problem is with two BiDi (bi-directional) transceivers, refer to
their data sheets to verify that their transmission and reception
frequencies are opposite each other. For instance, a BiDi
transceiver that transmits and receives at 1310nm and 1550nm,
respectively, has to be connected to a transceiver that transmits
and receives at 1550nm and 1310nm, respectively. Two BiDi
transceivers will not establish a link if they transmit and receive at
the same frequencies.
Test the attenuation of both directions on the fiber optic cable with
a fiber optic tester to determine whether the optical signal is too
weak or strong.
Problem 4:
A 40Gbps or 100Gbps fiber optic transceiver in port 25, 29,
33, or 37 cannot establish a link with a network device.
Solutions:
Try the following:
Review the solutions to Problem 3.
Use the SHOW PLATFORM command to confirm that the port is
configured correctly for the transceiver. If necessary, use the
PLATFORM PORTMODE INTERFACE command to configure the
port. For more information, refer to “PLATFORM PORTMODE
INTERFACE” on page 121. Changing a port from a 40Gbps
transceiver or breakout cable to a 100Gbps transceiver requires
resetting the switch. The same is also true when replacing a
100Gbps transceiver with a 40Gbps transceiver or breakout cable.
If the problem is with an 100Gbps transceiver, you might need to
adjust the Forward Error Correction (FEC) parameter on the port,
Содержание AT-x950-28XSQ
Страница 8: ...Contents 8 ...
Страница 12: ...Tables 12 ...
Страница 16: ...Preface 16 ...
Страница 62: ...Chapter 2 Virtual Chassis Stacking 62 ...
Страница 80: ...Chapter 3 Beginning the Installation 80 ...
Страница 90: ...Chapter 4 Installing Power Supplies and Optional XEM2 Line Card 90 ...
Страница 102: ...Chapter 6 Installing the Switch in an Equipment Rack 102 ...
Страница 106: ...Chapter 7 Installing the Switch on a Wall 106 Figure 67 Minimum Wall Area Dimensions with the Front Panel on the Right ...
Страница 118: ...Chapter 7 Installing the Switch on a Wall 118 ...
Страница 146: ...Chapter 8 Configuring Switches for Stacking 146 ...
Страница 158: ...Chapter 9 Cabling the Networking Ports 158 ...
Страница 164: ...Chapter 10 Replacing Modules 164 Figure 94 Tightening the Two Screws on the Line Card Blank Panel ...
Страница 169: ...AT x950 28XSQ Switch and VCStack Installation Guide 169 Figure 100 Installing the Blank Power Supply Cover ...
Страница 180: ...Chapter 11 Troubleshooting 180 ...
Страница 190: ...Appendix A Technical Specifications 190 ...