Verifying the data path

This procedure checks whether network continuity might be the reason for dropped packets.

  1. Enter the ping command to test for a complete path to the end device
    device# ping 10.24.81.2
    PING 10.24.81.2 (10.24.81.2): 56 octets data
    64 octets from 10.24.81.2: icmp_seq=0 ttl=128 time=9.4 ms
    64 octets from 10.24.81.2: icmp_seq=1 ttl=128 time=0.3 ms
    64 octets from 10.24.81.2: icmp_seq=2 ttl=128 time=0.3 ms
    64 octets from 10.24.81.2: icmp_seq=3 ttl=128 time=0.3 ms
    64 octets from 10.24.81.2: icmp_seq=4 ttl=128 time=0.3 ms
    --- 10.24.81.2 ping statistics ---
    5 packets transmitted, 5 packets received, 0% packet loss
    round-trip min/avg/max = 0.3/2.1/9.4 ms
  2. Enter the show interface command to display whether packets are coming in or are dropped as errors.
    device# show interface eth 0/1 
    Ethernet 0/1 is admin down, line protocol is down (admin down)
    Hardware is Ethernet, address is 0000.aaaa.bbbb
        Current address is 0000.aaaa.bbbb
    Pluggable media present
    Interface index (ifindex) is 203431936 (0xc202000)
    MTU 1548 bytes
    10G Interface
    LineSpeed Actual     : Nil
    LineSpeed Configured : Auto, Duplex: Full
    Priority Tag disable
    Forward LACP PDU: Disable
    Route Only: Disabled
    Tag-type: 0x8100
    Last clearing of show interface counters: 11:18:42
    Queueing strategy: fifo
    Receive Statistics:
        0 packets, 0 bytes
        Unicasts: 0, Multicasts: 0, Broadcasts: 0
        64-byte pkts: 0, Over 64-byte pkts: 0, Over 127-byte pkts: 0
        Over 255-byte pkts: 0, Over 511-byte pkts: 0, Over 1023-byte pkts: 0
        Over 1518-byte pkts(Jumbo): 0
        Runts: 0, Jabbers: 0, CRC: 0, Overruns: 0
        Errors: 0, Discards: 0
    Transmit Statistics:
        0 packets, 0 bytes
        Unicasts: 0, Multicasts: 0, Broadcasts: 0
        Underruns: 0
        Errors: 0, Discards: 0
    Rate info:
        Input 0.000000 Mbits/sec, 0 packets/sec, 0.00% of line-rate
        Output 0.000000 Mbits/sec, 0 packets/sec, 0.00% of line-rate
    Route-Only Packets Dropped: 0
    Time since last interface status change: 11:18:42
  3. Enter the show media interface command to check that the optics used are Brocade- or Extreme-certified and that the Power fields are not zero.
    device# show media interface ethernet 0/1
      Interface      Ethernet 0/1
      Identifier     3    SFP
      Connector      7    LC
      Transceiver            0000000000000010 10_GB/s  
      Name           sw
      Encoding       6    
      Baud Rate      103 (units 100 megabaud)
      Length 9u      0   (units km)
      Length 9u      0   (units 100 meters)
      Length 50u     8   (units 10 meters)
      Length 62.5u   3   (units 10 meters)
      Length Cu      0   (units 1 meter)
      Vendor Name    BROCADE         
      Vendor OUI     00:05:1e
      Vendor PN      57-0000075-01    (10GE SR SFP+)
      Vendor Rev     A
      Wavelength     850 (units nm)
      Options        001a 
      BR Max         0   
      BR Min         0   
      Serial No      AAF313060000MV6 
      Date Code      130206
      Optical Monitor Yes
      Temperature    20 Centigrade
      Voltage        3286.2  (mVolts)
      Current        0.278  (mAmps)
      TX Power       13.3  (uWatts) / -18.761 (dBm)
      RX Power       2.7  (uWatts)
    Note

    Note

    Some devices do not display TX Power.
  4. Enter the show arp vrf command.
  5. Enter the show mac-address-table command to verify that the MAC address table learns new values.

    The new MAC address should appear here.

  6. Enter the show lldp neighbors command to verify that LLDP reports all neighbors.

    If the output does not show all neighbors, contact your device support provider.

  7. Enter the show mac-address-table command to detect whether MAC addresses learned from other network devices are present.

    Enter this command on other network devices to ensure that those devices can detect this MAC address.