Description

Juniper Networks EX4100s will not bring a link up when using SFP-Ts on ports ge-0/1/0 to port ge-0/1/3.

Symptoms

mist@switch> show chassis pic fpc-slot 0 pic-slot 1
FPC slot 0, PIC slot 1 information:
Type               4x1G/10G SFP/SFP+
State              Online  
PIC version           1.10
Uptime              28 days, 2 hours, 11 minutes, 50 seconds

PIC port information:
                         Fiber                    Xcvr vendor       Wave-                     Xcvr          JNPR     MSA
  Port Cable type        type  Xcvr vendor        part number       length                    Firmware      Rev      Version
  0    GIGE 1000T        n/a   ACME CORP.         ABCD1234E2FGH-I3  n/a                       0.0           REV 02   SFF-8472 ver n/a


{master:0}
mist@switch> show interfaces ge-0/1/0 terse
Interface        Admin Link Proto  Local         Remote
ge-0/1/0        up     down
ge-0/1/0.0      up     down eth-switch

 

{master:0}
mist@switch> show chassis hardware
Hardware inventory:
Item              Version Part number Serial number   Description
Chassis                               AB1234CD567     EX4100-F-24P
Pseudo CB 0  
Routing Engine 0          BUILTIN     BUILTIN         RE-EX4100-F-24P
FPC 0            REV 10   650-134062  AB1234CD567     EX4100-F-24P
  CPU                     BUILTIN     BUILTIN         FPC CPU
  PIC 0          REV 10   BUILTIN     BUILTIN         24x10M/100M/1G Base-T
  PIC 1          REV 10   650-134062  AB1234CD567     4x1G/10G SFP/SFP+
    Xcvr 0       REV 02   740-013111  A1B2C3          SFP-T
  PIC 2          REV 10   650-134062  AB1234CD567     4x1G/10G SFP/SFP+
Power Supply 0            BUILTIN     BUILTIN         JPSU-450W-AC-AFO
Fan Tray 0                                            Fan Module, Airflow Out (AFO)
Fan Tray 1                                            Fan Module, Airflow Out (AFO)

Solution

This is expected behavior, Ports 0-3 on PIC 1 do not support 1G SFP-T and 100m optics as documented here: https://www.juniper.net/documentation/us/en/software/junos/interfaces-ethernet-switches/topics/topic-map/switches-interface-port.html#channel-ex4100

Modification History

2024-07-09 : Article Created

Related Information

https://www.juniper.net/documentation/us/en/software/junos/interfaces-ethernet-switches/topics/topic-map/switches-interface-port.html