Hello,
I'm currently having an issue with establishing a dark fiber circuit between datacenters. The circuit provider has tested the circuit to be good. So, I started my testing on the local end to ensure the hardware (Switch, Switchport, Transceiver) is functioning properly at a basic level before connecting the circuit but ran into an issue. I'm unable to establish an "UP" status on the interface I've installed the 10GBase-LR SFP with a hard loop on the transceiver within my switch. I've tried several ports to verify it's not a switchport issue but same results. I've replaced the 10GBase-LR (Single-Mode) with a 10GBase-SR (Multi-Mode) and the interface works perfectly. The status changes to "UP".
I've added some additional information below. I'm starting think it may be a bad SFP.
Cisco Nexus5548 Chassis
System version: 6.0(2)N2(3)
show interface ethernet 2/6
Ethernet2/6 is down (Link not connected)
Dedicated Interface
Hardware: 1000/10000 Ethernet, address: 002a.6a89.30c5 (bia 002a.6a89.30c5)
Description:
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is access
auto-duplex, 10 Gb/s, media type is 10G
Beacon is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
EtherType is 0x8100
Last link flapped never
Last clearing of "show interface" counters 00:33:05
0 interface resets
30 seconds input rate 0 bits/sec, 0 packets/sec
30 seconds output rate 0 bits/sec, 0 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
RX
0 unicast packets 0 multicast packets 0 broadcast packets
0 input packets 0 bytes
0 jumbo packets 0 storm suppression bytes
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
0 unicast packets 0 multicast packets 0 broadcast packets
0 output packets 0 bytes
0 jumbo packets
0 output error 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
show interface ethernet 2/6 transceiver details
Ethernet2/6
transceiver is present
type is 10Gbase-LR
name is CISCO-SUMITOMO
part number is SPP5200LR-C6
revision is B
serial number is
nominal bitrate is 10300 MBit/sec
Link length supported for 9/125um fiber is 10 km
cisco id is --
cisco extended id number is 4
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 0.00 C 75.00 C -5.00 C 70.00 C 0.00 C
Voltage 0.00 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 0.00 mA 90.00 mA 20.00 mA 84.00 mA 24.00 mA
Tx Power N/A 3.49 dBm -12.21 dBm 0.49 dBm -8.21 dBm
Rx Power N/A -- 3.49 dBm -18.53 dBm 0.49 dBm -14.43 dBm
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
show interface ethernet 2/6 brief
--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Port
Interface Ch #
--------------------------------------------------------------------------------
Eth2/6 321 eth access down Link not connected 10G(D) --
