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Troubleshooting Network Interfaces

Statistics for logical interfaces on Layer 2 interfaces are not accurate

Problem

Description

On QFX5000 switches, statistics for logical interfaces are not supported on Layer 2 interfaces or on any child member interfaces of Layer 2 aggregated Ethernet (AE) interfaces—that is, output for the show interfaces interface-name operational-mode command does not provide accurate I/O information for the logical interfaces.

Solution

If you need to see statistics for those logical interfaces, configure firewall filter rules to collect the information.

The interface on the port in which an SFP or SFP+ transceiver is installed in an SFP or SFP+ module is down

Problem

Description

The switch has an SFP or SFP+ module installed. The interface on the port in which an SFP or SFP+ transceiver is installed is down.

Symptoms

When you check the status with the CLI command show interfaces interface-name , the disabled port is not listed.

Cause

By default, the SFP or SFP+ module operates in the 10-Gigabit Ethernet mode and supports only SFP or SFP+ transceivers. The operating mode for the module is incorrectly set.

Solution

Only SFP or SFP+ transceivers can be installed in SFP or SFP+ modules. You must configure the operating mode of the SFP or SFP+ module to match the type of transceiver you want to use. For SFP+ transceivers, configure 10-Gigabit Ethernet operating mode.