I have a Juniper EX4200 with a EX-UM-2X4SFP uplink module, and it’s not recognizing the SFP module I’m trying to connect to Single Mode Fiber.
This is my hardware
run show chassis hardware
I can see the fiber card and module I have inserted
Hardware inventory:
Item Version Part number Serial number Description
Chassis BP0211100375 EX4200-48T
Routing Engine 0 REV 08 750-033063 BP0211100375 EX4200-48T, 8 POE
FPC 0 REV 08 750-033063 BP0211100375 EX4200-48T, 8 POE
CPU BUILTIN BUILTIN FPC CPU
PIC 0 BUILTIN BUILTIN 48x 10/100/1000 Base-T
PIC 1 REV 05 711-026017 CH0211241152 2x 10GE SFP+
Xcvr 1 NON-SFP+ PC71UN9 SFP-LX10
Power Supply 0 REV 04 740-020957 AT0511075037 PS 320W AC
Power Supply 1 REV 05 740-020957 AT0511121721 PS 320W AC
Fan Tray Fan Tray
But next, if I check the PIC module, it shows my fiber module
run show chassis pic fpc-slot 0 pic-slot 1
output
FPC slot 0, PIC slot 1 information:
Type 2x 10GE SFP+
State Online
PIC version 1.5
Uptime 124 days, 1 hour, 28 minutes, 57 seconds
PIC port information:
Fiber Xcvr vendor
Port Cable type type Xcvr vendor part number Wavelength
1 GIGE 1000LX10 SM FINISAR CORP. FTRJ1319P1BTL 1310 nm
Now if I try show interface status it doesn’t give me anything, it’s like the interface doesn’t really exist.
run show interfaces ge-0/1/1
result
error: device ge-0/1/1 not found
So, what is the problem?
This key is in the output above it’s in 2x 10G mode. The default is not for connecting 4 1G fiber SFP, it’s two 10G SFP+ modules. We need to set it to 4x 1G mode so we can use all 4 ports.
To change the mode to 4x 1G SFP modules you would use
set chassis fpc 0 pic 1 sfpplus pic-mode 1g
or to change it back to 2x 10G SFP+
set chassis fpc 0 pic 1 sfpplus pic-mode 10g
Documentation says, if you’re running Junos OS version earlier than 10.0 you’ll need to reboot, I’m running 12.x so it took a minute but changes became effect immediately.
You can check the module again
run show chassis pic fpc-slot 0 pic-slot 1
you’ll see it change from 2x 10GE SFP+ to 4x GE SFP+ in the Type.
FPC slot 0, PIC slot 1 information: Type 4x GE SFP+ State Online PIC version 1.5 Uptime 5 minutes, 29 seconds
Now if i run show interface like earlier.
run show interfaces ge-0/1/1
I get the output I expect
Physical interface: ge-0/1/1, Enabled, Physical link is Up
Interface index: 177, SNMP ifIndex: 600
Description: cust-xxxx-smf
Link-level type: Ethernet, MTU: 1514, Speed: 1000mbps, Duplex: Full-Duplex,
BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled,
Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,
Remote fault: Online
Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x0
Link flags : None
CoS queues : 8 supported, 8 maximum usable queues
Current address: 5c:5e:ab:63:c6:34, Hardware address: 5c:5e:ab:63:c6:34
Last flapped : 2017-09-01 14:48:19 PDT (00:02:18 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
Active alarms : None
Active defects : None
Interface transmit statistics: Disabled
Logical interface ge-0/1/1.0 (Index 115) (SNMP ifIndex 601)
Flags: SNMP-Traps 0x0 Encapsulation: ENET2
Input packets : 96
Output packets: 106
Protocol eth-switch
Flags: None
You should be good now.