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Troubleshooting Overview

 

This topic provides a general guide to troubleshooting some typical problems you may encounter on your QFX Series or OCX Series product.

Table 1 provides a list of problem categories, summary of the symptom or problem, and recommended actions with links to the troubleshooting documentation.

Table 1: Troubleshooting on the QFX Series

Problem Category

Symptom or Problem

Recommended Action

Switch hardware components

LCD panel shows a chassis alarm count.

See Chassis Alarm Messages on a QFX3500 Device.

Fan tray LED is blinking amber.

See Fan Tray LED on a QFX3500 Device.

Chassis status LED for the power is blinking amber.

See Chassis Status LEDs on a QFX3500 Device.

Chassis status LED for the fan (on the management board) is blinking amber.

Replace the management board as soon as possible. See Chassis Status LEDs on a QFX3500 Device.

Port configuration

Cannot configure a port as a Gigabit Ethernet port.

Check whether the port is a valid Gigabit Ethernet port (6 through 41).

See QFX3500 Device Overview.

Cannot configure a port as a Fibre Channel port.

Check whether the port is a valid Fibre Channel port (0 through 5 and 42 through 47).

See QFX3500 Device Overview.

Cannot configure a port as a 10-Gigabit Ethernet port.

If the port is not a 40-Gbps QSFP+ interface, check whether the port is in the range of 0 through 5 or 42 through 47. If one of the ports in that block (0 through 5 or 42 through 47) is configured as a Fibre Channel port, then all ports in that block must also be configured as Fibre Channel ports.

If the port is a 40-Gbps QSFP+ interface. make sure the configuration does not exceed the interface limit. Each 40-Gbps QSFP+ interface can be split into four 10-Gigabit Ethernet interfaces, but because port 0 is reserved, so you can only configure an additional fifteen 10-Gigabit Ethernet interfaces.

See QFX3500 Device Overview.

Cannot configure a 40-Gbps QSFP+ interface.

The 40-Gbps QSFP+ interfaces can only be used as 10-Gigabit Ethernet interfaces. Each 40-Gbps QSFP+ interface can be split into four 10-Gigabit Ethernet interfaces using a breakout cable. However, port 0 is reserved, so you can only configure an additional fifteen 10-Gigabit Ethernet interfaces.

See QFX3500 Device Overview.

External devices (USB devices)

Upgrading software from a USB device results in an upgrade failure, and the system enters an invalid state.

Unplug the USB device and reboot the switch.

Initial device configuration

Cannot configure management Ethernet ports.

Configure the management ports from the console port. You cannot configure the management ports by directly connecting to them.

Note: The management ports are on the front panel of the QFX3500 switch. They are labeled C0 and C1 on the front panel. In the CLI they are referred to as me0 and me1.

See Configuring a QFX3500 Device as a Standalone Switch.

Software upgrade and configuration

Failed software upgrade.

See Recovering from a Failed Software Installation.

Active partition becomes inactive after upgrade.

Problem with the active configuration file.

See the following topics:

Root password is lost or forgotten.

Recover the root password. See Recovering the Root Password for Switches.

Network interfaces

An aggregated Ethernet interface is down.

See Troubleshooting an Aggregated Ethernet Interface.

Interface on built-in network port is down.

See Troubleshooting Network Interfaces.

Interface on port in which SFP or SFP+ transceiver is installed in an SFP+ uplink module is down.

Ethernet switching

A MAC address entry in the Ethernet switching table is not updated after the device with that MAC address has been moved from one interface to another on the switch.

See Troubleshooting Ethernet Switching.

Firewall filter

Firewall configuration exceeded available Ternary Content Addressable Memory (TCAM) space.

See Troubleshooting Firewall Filters.