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I have two Juniper EX switches, and the Juniper-EX-01(ge-0/1/1) connected to the Juniper-EX-02(ge-0/1/0). I want to check is there any optical attenuation problem, or other link errors.

admin@Juniper-EX-01# run show interfaces extensive ge-0/1/1
Physical interface: ge-0/1/1, Enabled, Physical link is Up
  Interface index: 281, SNMP ifIndex: 717, Generation: 285
  Link-level type: Ethernet, MTU: 1514, MRU: 0, 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, Media type: Fiber
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 54:e0:32:fb:a8:74, Hardware address: 54:e0:32:fb:a8:74
  Last flapped   : 2019-08-08 02:30:04 CST (6w4d 12:35 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :          17081938749                  656 bps
   Output bytes  :         128121858044                 1232 bps
   Input  packets:             54545052                    1 pps
   Output packets:            117983794                    2 pps
   IPv6 transit statistics:
    Input  bytes  :                   0
    Output bytes  :                   0
    Input  packets:                   0
    Output packets:                   0
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 0, L3 incompletes: 0, L2 channel errors: 0,
    L2 mismatch timeouts: 0, FIFO errors: 0, Resource errors: 0
  Output errors:
    Carrier transitions: 9, Errors: 0, Drops: 0, Collisions: 0, Aged packets: 0, FIFO errors: 0, HS link CRC errors: 0,
    MTU errors: 0, Resource errors: 0
  Egress queues: 8 supported, 4 in use
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0                                0            117991972                    0
    1                                0                    0                    0
    5                                0                    0                    0
    7                                0               364088                    0
  Queue number:         Mapped forwarding classes
    0                   best-effort
    1                   assured-forwarding
    5                   expedited-forwarding
    7                   network-control
  Active alarms  : None
  Active defects : None
  MAC statistics:                      Receive         Transmit
    Total octets                   17081938749     128121858044
    Total packets                     54545052        117983794
    Unicast packets                   52201864        101950430
    Broadcast packets                    12091          6831177
    Multicast packets                  2331097          9202187
    CRC/Align errors                         0                0
    FIFO errors                              0                0
    MAC control frames                       0                0
    MAC pause frames                         0                0
    Oversized frames                         0
    Jabber frames                            0
    Fragment frames                          0
    Code violations                          0
  Autonegotiation information:
    Negotiation status: Complete
    Link partner:
        Link mode: Full-duplex, Flow control: Symmetric, Remote fault: OK, Link partner Speed: 1000 Mbps
    Local resolution:
        Flow control: Symmetric, Remote fault: Link OK
  Packet Forwarding Engine configuration:
    Destination slot: 0 (0x00)
  CoS information:
    Direction : Output
    CoS transmit queue               Bandwidth               Buffer Priority   Limit
                              %            bps     %           usec
    0 best-effort            95      950000000    95             NA      low    none
    7 network-control         5       50000000     5             NA      low    none
  Interface transmit statistics: Disabled

  Logical interface ge-0/1/1.0 (Index 72) (SNMP ifIndex 718) (Generation 141)
    Flags: Up SNMP-Traps 0x40004000 Encapsulation: ENET2
    Traffic statistics:
     Input  bytes  :            175942818
     Output bytes  :               757316
     Input  packets:              2286580
     Output packets:                15966
    Local statistics:
     Input  bytes  :            175942818
     Output bytes  :               757316
     Input  packets:              2286580
     Output packets:                15966
    Transit statistics:
     Input  bytes  :                    0                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                    0                    0 pps
     Output packets:                    0                    0 pps
    Protocol eth-switch, Generation: 160, Route table: 0
      Flags: Trunk-Mode

{master:0}[edit]

=====

admin@Juniper-EX-02# run show interfaces extensive ge-0/1/0
Physical interface: ge-0/1/0, Enabled, Physical link is Up
  Interface index: 179, SNMP ifIndex: 604, Generation: 184
  Link-level type: Ethernet, MTU: 1514, MRU: 0, 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, Media type: Fiber
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 54:e0:32:fb:a9:73, Hardware address: 54:e0:32:fb:a9:73
  Last flapped   : 2019-08-08 02:30:04 CST (6w4d 12:34 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :         128117769576                 2952 bps
   Output bytes  :          17080239525                 1632 bps
   Input  packets:            117951632                    3 pps
   Output packets:             54528748                    1 pps
   IPv6 transit statistics:
    Input  bytes  :                   0
    Output bytes  :                   0
    Input  packets:                   0
    Output packets:                   0
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 0,
    L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0,
    FIFO errors: 0, Resource errors: 0
  Output errors:
    Carrier transitions: 1, Errors: 0, Drops: 0, Collisions: 0, Aged packets: 0,
    FIFO errors: 0, HS link CRC errors: 0, MTU errors: 0, Resource errors: 0
  Egress queues: 8 supported, 4 in use
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0                                0             52257612                    0
    1                                0                    0                    0
    5                                0                    0                    0
    7                                0              2273837                    0
  Queue number:         Mapped forwarding classes
    0                   best-effort
    1                   assured-forwarding
    5                   expedited-forwarding
    7                   network-control
  Active alarms  : None
  Active defects : None
  MAC statistics:                      Receive         Transmit
    Total octets                  128117769576      17080239525
    Total packets                    117951632         54528748
    Unicast packets                  101943892         52194043
    Broadcast packets                  6825720            12079
    Multicast packets                  9182020          2322626
    CRC/Align errors                         0                0
    FIFO errors                              0                0
    MAC control frames                       0                0
    MAC pause frames                         0                0
    Oversized frames                         0
    Jabber frames                            0
    Fragment frames                          0
    Code violations                          0
  Autonegotiation information:
    Negotiation status: Complete
    Link partner:
        Link mode: Full-duplex, Flow control: Symmetric, Remote fault: OK,
        Link partner Speed: 1000 Mbps
    Local resolution:
        Flow control: Symmetric, Remote fault: Link OK
  Packet Forwarding Engine configuration:
    Destination slot: 0 (0x00)
  CoS information:
    Direction : Output
    CoS transmit queue               Bandwidth               Buffer Priority   Limit
                              %            bps     %           usec
    0 best-effort            95      950000000    95             NA      low    none
    7 network-control         5       50000000     5             NA      low    none
  Interface transmit statistics: Disabled

  Logical interface ge-0/1/0.0 (Index 121) (SNMP ifIndex 605) (Generation 188)
    Flags: Up SNMP-Traps 0x40004000 Encapsulation: ENET2
    Traffic statistics:
     Input  bytes  :            351604807
     Output bytes  :            291840916
     Input  packets:              1735457
     Output packets:              2425190
    Local statistics:
     Input  bytes  :            351604807
     Output bytes  :            291840916
     Input  packets:              1735457
     Output packets:              2425190
    Transit statistics:
     Input  bytes  :                    0                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                    0                    0 pps
     Output packets:                    0                    0 pps
    Protocol eth-switch, Generation: 207, Route table: 0
      Flags: Trunk-Mode

{master:0}[edit]

there upper are two switches' connected interfaces extensive data, can this show problems?


My problem is this:

enter image description here

all the switches have static route 0.0.0.0/0 next-hop 10.10.11.80, except the 10.10.11.80 switch itself, so they should ping each other.

  1. I can ping 10.10.11.121 and 10.10.11.122 with each other without any ICMP package drop.(its very stable)
  2. 10.10.11.55 can ping 10.10.11.121 very stably
  3. but when 10.10.11.55 ping 10.10.11.122, there will drop packages.

So, I want to check the link between 10.10.11.121 and 10.10.11.122. Who can help with this?

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