Troubleshooting Network Interfaces on EX3200 Switches

This topic provides troubleshooting information for specific problems related to interfaces on EX3200 switches.

• The interface on one of the last four built-in network ports in an EX3200 switch (for example, interface ge-0/0/23) is down
• The interface on the port in which an SFP or SFP+ transceiver is installed in an SFP+ uplink module is down

The interface on one of the last four built-in network ports in an EX3200 switch (for example, interface ge-0/0/23) is down

Problem

The interface on one of the last four built-in ports (ge-0/0/20 through ge-0/0/23 on 24-port models or ge-0/0/44 through ge-0/0/47 on 48-port models) of an EX3200 switch is down.

An SFP or SFP+ uplink module is installed in the switch and a transceiver is installed in one of the ports on the uplink module.

When you check the status with the CLI command show interfaces ge- or with the J-Web user interface, the disabled port is not listed.

Cause

The last four built-in ports use the same ASIC as the SFP uplink module. Therefore, if you install a transceiver in an SFP or SFP+ uplink module installed in an EX3200 switch, a corresponding base port from the last four built-in ports is disabled.

Solution

If you need to use the disabled built-in port, you must remove the transceiver from the SFP or SFP+ uplink module. Alternatively, you can install an XFP uplink module instead of an SFP or SFP+ uplink module. There is no conflict between the built-in network ports and the ports on the XFP uplink modules.

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

Problem

The interface on the port in which an SFP or SFP+ transceiver is installed in an SFP+ uplink module installed in an EX3200 switch is down.

When you check the status with the CLI command show interfaces ge- or with the J-Web user interface, the disabled port is not listed.

Cause

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

Solution

Either SFP+ or SFP transceivers can be installed in SFP+ uplink modules. You must configure the operating mode of the SFP+ uplink module to match the type of transceiver you want to use. For SFP+ transceivers, configure the 10-gigabit operating mode and for SFP transceivers, configure the 1-gigabit operating mode. See Setting the Mode on an SFP+ Uplink Module (CLI Procedure).