Troubleshoot Network Interfaces
Learn about how to resolve inaccurate statistics for logical interfaces on Layer 2 interfaces and fix down interfaces on ports with SFP or SFP+ transceivers
Statistics for logical interfaces on Layer 2 interfaces are not accurate
Problem
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.
Cause
By default, QFX5000 switches do not collect statistics for logical interfaces on Layer 2 interfaces. This limitation also affects the child interfaces of Layer 2 AE interfaces, which leads to incomplete or missing I/O statistics.
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
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.
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.