I don’t know if it can be useful for someone, but I share :

To know about optic budget :

RP/0/RSP0/CPU0:ASR9K-01#show controllers tenGigE 0/0/0/2 phy
Tue Dec  9 18:10:41.280 CET

SFP EEPROM  port: 2
        Xcvr Type: SFP
        Xcvr Code: SFP-10G-ER
        Encoding: 64B66B
        Bit Rate: 10300 Mbps
        Link Reach 9u fiber (Km): 40000 meter
        Link Reach 9u fiber (100m): 25500 meter
        Link Reach 9u fiber (100m): 25500 meter
        Vendor Name: CISCO-FINISAR  
        Vendor OUI: 00.90.65
        Vendor Part Number: FTLX1671D3BCL-C4 (rev.: A   )
        Laser wavelength: 1550 nm (fraction: 0.00 nm)
        Optional SFP Signal: Rate Sel, LOS
        Vendor Serial Number: FNS181206PL    
        Date Code (yy/mm/dd): 14/03/17  lot code:  
        Diagnostic Monitoring: DOM, Int. Cal.,
        Enhanced Options: SW RX LOS Mon., SW TX Fault Mon, SW TX Disable, Alarm/Warning Flags
[...]
        Thresholds:                    Alarm High         Warning High          Warning Low            Alarm Low
              Temperature:            +75.000 C             +70.000 C              +0.000 C              -5.000 C
                  Voltage:           3.630 Volt            3.465 Volt            3.135 Volt            2.970 Volt
                     Bias:        100.000 mAmps          95.000 mAmps          55.000 mAmps          50.000 mAmps
           Transmit Power:  5.012 mW (7.00 dBm)   2.512 mW (4.00 dBm)   0.339 mW (-4.70 dBm)   0.135 mW (-8.70 dBm)
           Receive Power:  1.585 mW (2.00 dBm)   0.794 mW (-1.00 dBm)   0.026 mW (-15.80 dBm)   0.011 mW (-19.79 dBm)
        Temperature: 41.539
        Voltage: 3.319 Volt
        Tx Bias: 81.050 mAmps
        Tx Power:  1.693 mW (2.29 dBm)
        Rx Power:  0.008 mW (-21.02 dBm)
        Oper. Status/Control: Rx Rate Select, 

More to see on the right…

Stats and more specifics errors :

RP/0/RSP0/CPU0:ASR9K-01#show controllers tenGigE 0/0/0/2 ? 
  all       Show all the information
  bert      Show BERT status
  control   Show configuration and control information(cisco-support)
  internal  Show internal information
  mac       Show mac information
  phy       Show phy information
  regs      Show registers information
  stats     Show stats information
  xgxs      Show xgxs information
  |         Output Modifiers
       
RP/0/RSP0/CPU0:ASR9K-01#show controllers tenGigE 0/0/0/2 stats
Tue Dec  9 18:10:54.905 CET
Statistics for interface TenGigE0/0/0/2 (cached values):

Ingress:
    Input total bytes           = 583691
    Input good bytes            = 583691

    Input total packets         = 4563
    Input 802.1Q frames         = 0
    Input pause frames          = 0
    Input pkts 64 bytes         = 0
    Input pkts 65-127 bytes     = 4108
    Input pkts 128-255 bytes    = 71
    Input pkts 256-511 bytes    = 269
    Input pkts 512-1023 bytes   = 61
    Input pkts 1024-1518 bytes  = 52
    Input pkts 1519-Max bytes   = 2 

    Input good pkts             = 4548
    Input unicast pkts          = 157
    Input multicast pkts        = 4347
    Input broadcast pkts        = 59

    Input drop overrun          = 0
    Input drop abort            = 0
    Input drop invalid VLAN     = 0
    Input drop invalid DMAC     = 0
    Input drop invalid encap    = 0
    Input drop other            = 0

    Input error giant           = 0
    Input error runt            = 0
    Input error jabbers         = 0
    Input error fragments       = 0
    Input error CRC             = 12
    Input error collisions      = 0
    Input error symbol          = 232214
    Input error other           = 3

    Input MIB giant             = 2
    Input MIB jabber            = 0
    Input MIB CRC               = 12

 
Egress:

    Output total bytes          = 757008
    Output good bytes           = 757008

    Output total packets        = 5682
    Output 802.1Q frames        = 0
    Output pause frames         = 0
    Output pkts 64 bytes        = 59
    Output pkts 65-127 bytes    = 5239
    Output pkts 128-255 bytes   = 93
    Output pkts 256-511 bytes   = 162
    Output pkts 512-1023 bytes  = 71
    Output pkts 1024-1518 bytes = 58
    Output pkts 1519-Max bytes  = 0

    Output good pkts            = 5682
    Output unicast pkts         = 332
    Output multicast pkts       = 5350
    Output broadcast pkts       = 0

    Output drop underrun        = 0
    Output drop abort           = 0
    Output drop other           = 0

    Output error other          = 0

If you read it carefully you must have seen that my link have some problems… Which ones ?

I will probably write another article to talk only about NP, FIA, …