Physical Links

The physical cables or fibers that connect the switches to each other and to servers can be monitored with the following commands:

Transceivers

core@control-1 ~ $ kubectl fabric inspect switch --name ds5000-02 --transceivers
NAME         PROFILE             ROLE     GROUPS    SERIAL                    STATE    GEN      APPLIED           HEARTBEAT
ds5000-02    Celestica DS5000    spine              R4028F2B125421GD200304    Ready    55/55    20 minutes ago    6 seconds ago

Transceivers:
NAME     OPER      DESCRIPTION                          CLASS    CONNECTOR       VENDOR     PART                SERIAL           CMIS
E1/1     active    OSFP112 800GBASE-DR8                 FIBER    MPO_2x12        T1NEXUS    T1O112-800G-2DR4    T100AC006346     Ready 4.0 (4)
E1/5     active    OSFP112 2x(400GBASE-CR4-DAC)-2.0M    DAC      NO_SEPARABLE    FS         OSFP-800G-2QPC02    C2504186220      Ready 5.0 (0)
E1/61    active    OSFP112 2x(400GBASE-CR4-DAC)-2.0M    DAC      NO_SEPARABLE    FS         OSFP-800G2OPC015    C2504422334      Ready 5.0 (0)
E1/62    active    OSFP112 2x(400GBASE-CR2-DAC)-1.0M    DAC      NO_SEPARABLE    FS         OSFP-800G-PC01      C2504140951-1    Ready 4.0 (0)
E1/63    active    OSFP112 2x(400GBASE-CR2-DAC)-1.0M    DAC      NO_SEPARABLE    FS         OSFP-800G-PC01      C2504422332-2    Ready 4.0 (0)
E1/64    active    OSFP112 2x(400GBASE-CR2-DAC)-1.0M    DAC      NO_SEPARABLE    FS         OSFP-800G-PC01      C2504422333-1    Ready 4.0 (0)

Use flags for more details: -d/--details (e.g. firmware), -p/--ports, -t/--transceivers, -c/--counters, -l/--lasers

Lasers

The status of the lasers is also available through the inspect commands:

core@control-1 ~ $ kubectl fabric inspect switch --name ds5000-02 --lasers
NAME         PROFILE             ROLE     GROUPS    SERIAL                    STATE    GEN      APPLIED           HEARTBEAT
ds5000-02    Celestica DS5000    spine              R4028F2B125421GD200304    Ready    55/55    21 minutes ago    11 seconds ago

Laser Status:
NAME    CHANNELS IN / OUT ( BIAS )
E1/1    0: 2.61/1.88 dBm (36.56 mA)    1: 1.07/1.72 dBm (36.56 mA)    2: 1.72/1.68 dBm (36.56 mA)    3: 2.38/1.68 dBm (36.56 mA)

Use flags for more details: -d/--details (e.g. firmware), -p/--ports, -t/--transceivers, -c/--counters, -l/--lasers

Often a value of -40dBm on the transmit or receive side indicates that the laser is not on. If supported, check the CMIS status of the optic.

Ports

The inspect command will also show the connections and counters on a specific port:

core@control-1 ~ $ kubectl fabric inspect switchport -n spine-02/E1/1
Used in Connection spine-02--fabric--leaf-01:
fabric:
  links:
  - leaf:
      ip: 172.30.128.21/31
      port: leaf-01/E1/10
    spine:
      ip: 172.30.128.20/31
      port: spine-02/E1/1
  - leaf:
      ip: 172.30.128.23/31
      port: leaf-01/E1/11
    spine:
      ip: 172.30.128.22/31
      port: spine-02/E1/2

Port Counters (↓ In ↑ Out):
SPEED    UTIL  %         BITS / SEC IN    BITS / SEC OUT    PKTS / SEC IN    PKTS / SEC OUT    CLEAR    ERRORS      DISCARDS
25G      ↓   0 ↑   0     ↓ 2,432          ↑ 2,224           ↓ 3              ↑ 3               -        ↓ 0 ↑ 0     ↓ 2 ↑ 0