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NE40E V800R010C10SPC500 Commissioning Guide

This is NE40E V800R010C10SPC500 Commissioning Guide
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Checking Ethernet Interfaces

Checking Ethernet Interfaces

This section describes how to check the link layer on Ethernet interfaces.


Checking the Hardware is complete and the NE40E works properly.


  1. Run the display interface brief command to view brief information about Ethernet interfaces, including the physical status, link layer protocol status, bandwidth usage in the inbound and outbound directions, and statistics about incorrect packets.

    <HUAWEI> display interface brief
    PHY: Physical
    *down: administratively down
    ^down: standby
    (l): loopback
    (s): spoofing
    (b): BFD down
    (e): EFM down
    (d): Dampening Suppressed
    InUti/OutUti: input utility/output utility
    Interface                PHY      Protocol   InUti OutUti    inErrors  outErrors
    GigabitEthernet0/0/0     up       up       11.19%  2.67%          0          0
    GigabitEthernet3/0/0     up       up           0%     0%          0          0
    GigabitEthernet3/0/1     up       up           0%     0%          0          0
    GigabitEthernet3/0/2     up       up           0%     0%          0          0
    GigabitEthernet3/0/3     up       up           0%     0%          0          0
    GigabitEthernet3/0/4     up       down         0%     0%          0          0
    GigabitEthernet3/0/5     up       down         0%     0%          0          0
    GigabitEthernet3/0/6     up       down         0%     0%          0          0
    GigabitEthernet3/0/7     up       down         0%     0%          0          0
    NULL0                    up       up(s)        0%     0%          0          0

    This command can quickly display the physical status and link layer protocol status of all Ethernet interfaces on the NE40E.

  2. Run the display interface command to view the physical status, auto-negotiation mode, MTU, IP address, mask, rate, and operation mode of an Ethernet interface. For example:

    <HUAWEI> display interface gigabitethernet 2/0/0
    GigabitEthernet2/0/0 current state : UP
    Line protocol current state : UP
    Last line protocol up time : 2012-12-14 14:21:38
    Route Port,The Maximum Transmit Unit is 1500
    Internet Address is
    IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 001a-bb2c-0101
    The Vendor PN is FTM3112CSL40GHW 
    The Vendor Name is SOURCEPHOTONICS 
    Port BW: 1G, Transceiver max BW: 1G, Transceiver Mode: SingleMode
    WaveLength: 1310nm, Transmission Distance: 40km
    Rx Power:  -2.62dBm, normal range: [-23.011,  -2.999]dBm
    Tx Power:  -2.94dBm, normal range: [-5.000,  0.000]dBm
    Loopback:none, full-duplex mode, negotiation: disable, Pause Flowcontrol:Receive Enable and Send Enable
    Last physical up time   : 2012-12-14 14:21:38
    Last physical down time : 2012-12-14 14:21:36
    Current system time: 2012-12-14 14:43:17
    Statistics last cleared:never
        Last 300 seconds input rate: 603172 bits/sec, 691 packets/sec
        Last 300 seconds output rate: 1536 bits/sec, 2 packets/sec
        Input: 21530408 bytes, 193944 packets
        Output: 83966 bytes, 994 packets
          Unicast: 31766 packets, Multicast: 162177 packets
          Broadcast: 1 packets, JumboOctets: 346 packets
          CRC: 0 packets, Symbol: 0 packets
          Overrun: 0 packets, InRangeLength: 0 packets
          LongPacket: 0 packets, Jabber: 0 packets, Alignment: 0 packets
          Fragment: 0 packets, Undersized Frame: 0 packets
          RxPause: 0 packets
          Unicast: 472 packets, Multicast: 521 packets
          Broadcast: 1 packets, JumboOctets: 0 packets
          Lost: 0 packets, Overflow: 0 packets, Underrun: 0 packets
          System: 0 packets, Overruns: 0 packets
          TxPause: 0 packets
        Last 300 seconds input utility rate:  0.07%
        Last 300 seconds output utility rate: 0.01%

    In normal situations, the physical status and protocol status of an interface are up, and the link status on the local end are the same as that on the peer end, as shown by the characters displayed in boldface.

  3. Run the ping command to test Ethernet link connectivity. For example:

    <HUAWEI> ping
      PING 56  data bytes, press CTRL_C to break
        Reply from bytes=56 Sequence=1 ttl=255 time=2 ms
        Reply from bytes=56 Sequence=2 ttl=255 time=1 ms
        Reply from bytes=56 Sequence=3 ttl=255 time=1 ms
        Reply from bytes=56 Sequence=4 ttl=255 time=1 ms
        Reply from bytes=56 Sequence=5 ttl=255 time=113 ms
      --- ping statistics ---
        5 packet(s) transmitted
        5 packet(s) received
        0.00% packet loss
        round-trip min/avg/max = 1/23/113 ms

    In normal situations, the ping operation should succeed.


  • If the physical status of an Ethernet interface is Down after the interface is configured, perform the following operations:

    1. Check that the peer device is started. If the peer device is not started, start it.

    2. Run the display interface interface-type interface-number command to view optical module information and interface configurations on the local and peer ends.
      • Check that the optical modules on the local and peer interfaces are matched and the fiber connected the optical modules and the power of connected optical modules meet the requirement. If the fiber or either of the optical modules does not meet the requirement, replace it.

      • Check that the auto-negotiation modes on the local and peer interfaces are consistent. If they are inconsistent, run the duplex command or negotiation auto command to make the two interfaces use the same duplex mode.

      • Check that the interface configurations such as the MTU, TTL of packets, format of transmitted Ethernet frames, and maximum QoS bandwidth on the local and peer ends are consistent. If they are inconsistent, adjust them to ensure consistency.

      • Check that the traffic is normal.

    3. Check that the fiber is properly and correctly installed. This means that the fiber is connected to the correct transmit optical module and receive optical module.

    4. Run the loopback command to check that the fiber between the local and peer ends is not damaged.

      If the physical layer on the local interface is Up after the loopback local command is run, the local interface is normal. If the peer interface is also configured with loopback local and the physical layer on the peer interface is Up, the peer interface is normal but the fiber does not work properly. In this case, replace the fiber.

    5. If the fault persists after the preceding operations are complete, contact Huawei technical support personnel.

  • If an Ethernet interface cannot be pinged, perform the following operations:

    1. Check that the local end is correctly connected to the peer end. Observe the Link indicator on the interface board where the local Ethernet interface resides. If the indicator is on, the link works properly. If the indicator is off, check the optical module, interface, fiber, and the device.

    2. Check that the auto-negotiation modes on the local and peer Ethernet interfaces are consistent.

    3. Check that the IP address of the local Ethernet interface belongs to the same subnet as that of the peer Ethernet interface. This means that the two IP addresses must have the same network address and different host addresses. If the two IP addresses do not belong to the same subnet, reconfiguration the IP addresses.

    4. Check that the link layer protocols on the local and peer ends are consistent. Reliable communication between two Ethernet devices is available only when they use the same link layer protocol.

    5. If the fault persists after the preceding operations are complete, contact Huawei technical support personnel.

Updated: 2019-01-02

Document ID: EDOC1100055014

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