Re: SFP Listed as Unknown

Mark H · ‎01-16-2018

Hi everyone,

Hoping someone can point me in the right direction why an SFP is being detected as unknown, I believe it should be working.

We have inserted 4, SFP-10G-ZR-S in to a N7K-F132XP-15 module. The Nexus 7K is running NX-OS 6..2(16). When I bring the interface up, it stays down due to link not connected. When I check capabilities (sh int eth2/17 capabilities) the type of SFP is listed as 10Gbase-(unknown). However when I check the transceiver (sh int eth2/17 transceiver) it is correctly detected as a SFP-10G-ZR-S.

Am I missing something here?

Mark

rojesara.prashant · ‎01-17-2018

Did you find any solution ?

Mark H · ‎01-17-2018

Hi rojesra.prashant,

No I have not found any solution.

Felipe A. Amaya · ‎01-17-2018

Please refer to the following post....

https://supportforums.cisco.com/t5/lan-switching-and-routing/sfp-showing-unknown-on-nexus-7000-plz-help/td-p/2181105

It might help.

Mark H · ‎01-17-2018

Hi amaya.felipe,

Thank you, I have found that previously but as far as I can tell I am using an 10Gb SFP in a 10Gb card.

rojesara.prashant · ‎01-17-2018

Checked Cisco documents and N7K-F132XP-15 supports 10Gbase-ZR but not sure what showing unknown in capabilities section.

xx# sh int ethx/x capabilities
Ethernetx/x
Model:                 N7K-F132XP-15
Type (SFP capable):    10Gbase-(unknown)
Speed:                 1000,10000
Duplex:                full
Trunk encap. type:     802.1Q
FabricPath capable:    yes
Channel:               yes
Broadcast suppression: percentage(0-100)
Flowcontrol:           rx-(off/on/desired),tx-(off/on/desired)
Rate mode:             dedicated
Port mode:             Switched
QOS scheduling:        rx-(2q4t),tx-(1p2q1t)
                         rx-(4q4t),tx-(3p1q1t)
                         rx-(0q0t),tx-(2p2q1t)
CoS rewrite:           yes
ToS rewrite:           yes
SPAN:                  yes
UDLD:                  yes
MDIX:                  yes
TDR capable:           no
Link Debounce:         yes
Link Debounce Time:    yes
FEX Fabric:            no
dot1Q-tunnel mode:     no
EFP:                   no
Num Rewrites Allowed: 0
Pvlan Trunk capable:   yes
Port Group Members:    17-18
EEE (efficient-eth):   no
PFC capable:           yes
Breakout capable:      no

xx# sh int ethx/x transceiver detail
Ethernetx/x
    transceiver is present
    type is 10Gbase-ZR
    name is CISCO-FUJITSU
    part number is FIM35050/207
    revision is 0001
    serial number is FLJ1916K005
    nominal bitrate is 10300 MBit/sec
    Link length supported for 9/125um fiber is 80 km
    cisco id is --
    cisco extended id number is 4
    cisco part number is 10-3111-01
    cisco product id is SFP-10G-ZR-S
    cisco vendor id is V01
    number of lanes 1

           SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
                Current              Alarms                  Warnings
                Measurement     High        Low         High          Low
----------------------------------------------------------------------------
Temperature   33.51 C        75.00 C     -5.00 C     70.00 C        0.00 C
Voltage        3.16 V         3.63 V      2.97 V      3.46 V        3.13 V
Current           N/A       105.00 mA    35.00 mA    98.00 mA      42.00 mA
Tx Power          N/A         7.00 dBm   -4.00 dBm    4.00 dBm      0.00 dBm
Rx Power          N/A        -2.99 dBm -30.96 dBm   -7.00 dBm    -26.98 dBm
Transmit Fault Count = 0
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning

rojesara.prashant · ‎01-18-2018

Looks like cable change has resolved the issue. We have checked with Cisco and below was response.
==============
We could see switch has no issue to detect SFP.

I understand you see unknown capability , such as :
xx# sh int ethx/xx capabilities
Ethernetx/xx
Model: N7K-F132XP-15
Type (SFP capable): 10Gbase-(unknown)
Speed: 1000,10000

Please be advised F132XP supports both 1G and 10 G SFP.

Currently, due to there is no configure on Ports and ports are admin shut down, switch do not know which speed the port is going to negotiate. (1G or 10 G)
================

Later on found issue to be with fiber cable.