Juniper Networks EX4200 - Manual (Page 217)

Chapter 15
Troubleshooting Switch Components
■ Troubleshooting Network Interfaces on EX3200 and EX4200 Switches on page 191
■ Troubleshooting Uplink Module Installation or Replacement on EX3200 and
EX4200 Switches on page 192
Troubleshooting Network Interfaces on EX3200 and EX4200 Switches
This topic provides troubleshooting information for specific problems related to
interfaces on EX3200 and EX4200 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 on page 191
■ The interface on the port in which an SFP or SFP+ transceiver is installed in an
SFP+ uplink module is down on page 192
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.
Troubleshooting Network Interfaces on EX3200 and EX4200 Switches ■ 191