1. NIC information didn’t show up correctly when ssh to the nodes
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NIC information didn’t show up correctly when ssh to the nodes

Home › Forums › FABRIC General Questions and Discussion › NIC information didn’t show up correctly when ssh to the nodes

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  • January 15, 2023 at 7:40 pm #3597
    Xusheng Ai
    Participant

      Hello,

      We requested a slice with 5 nodes and each node we assigned four ‘NIC_Basic’ components. Here is the slice information of node 1 

      
slice_name = 'Hydra_L2-diff-sites'
sites = ['UTAH','STAR', 'SALT', 'WASH', 'MICH']
node1_name = 'Node1'
node2_name = 'Node2'
node3_name = 'Node3'
node4_name = 'Node4'
node5_name = 'Node5'
network_name=['net1','net2','net3','net4','net5','net6','net7','net8','net9','net10']
node1_nic_name = ['nic1_1', 'nic1_2','nic1_3', 'nic1_4']
node2_nic_name = ['nic2_1','nic2_2', 'nic2_3', 'nic2_4' ]
node3_nic_name = ['nic3_1','nic3_2', 'nic3_3', 'nic3_4' ]
node4_nic_name = ['nic4_1','nic4_2', 'nic4_3', 'nic4_4' ]
node5_nic_name = ['nic5_1','nic5_2', 'nic5_3', 'nic5_4' ]
image = 'default_ubuntu_20'
cores = 2
ram = 8
disk = 50
# Node1
node1 = slice.add_node(name=node1_name, site=sites[0])
node1.set_capacities(cores=cores, ram=ram, disk=disk)
node1.set_image(image)
iface1_1 = node1.add_component(model='NIC_Basic', name=node1_nic_name[0]).get_interfaces()[0]
iface1_2 = node1.add_component(model='NIC_Basic', name=node1_nic_name[1]).get_interfaces()[0]
iface1_3 = node1.add_component(model='NIC_Basic', name=node1_nic_name[2]).get_interfaces()[0]
iface1_4 = node1.add_component(model='NIC_Basic', name=node1_nic_name[3]).get_interfaces()[0]

      When the slice state turned stableOK, we printed out the interfaces information. Below is the information of node 1:

      Name	        Node   Network Bandwidth VLAN	MAC	                Device	Device
Node1-nic1_4-p1	Node1	net4	100	None	06:AC:16:7B:38:FF	ens7	ens7
Node1-nic1_2-p1	Node1	net2	100	None	06:BA:BC:72:F8:34	ens8	ens8
Node1-nic1_3-p1	Node1	net3	100	None	0A:ED:E0:7F:C2:B5	ens10	ens10
Node1-nic1_1-p1	Node1	net1	100	None	0A:70:23:DD:1F:B7	ens9	ens9

      Therefore, for node 1, we was supposed to have four NICs. However, we ssh the node 1 and ran ifconfig command. There was no information about ens 7-10. 

      ubuntu@a8dd2195-7dce-4cdc-a8c8-34da897a835c-node1:~$ ifconfig 
ens3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
        inet 10.20.4.75  netmask 255.255.254.0  broadcast 10.20.5.255
        inet6 fe80::f816:3eff:fe34:23e  prefixlen 64  scopeid 0x20<link>
        inet6 2001:1948:417:7:f816:3eff:fe34:23e  prefixlen 64  scopeid 0x0<global>
        ether fa:16:3e:34:02:3e  txqueuelen 1000  (Ethernet)
        RX packets 1130  bytes 394337 (394.3 KB)
        RX errors 0  dropped 2  overruns 0  frame 0
        TX packets 1413  bytes 228963 (228.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 697  bytes 62796 (62.7 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 697  bytes 62796 (62.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

      We did a test run with example notebook — Create a Local Ethernet (Layer 2) Network, and the nodes did contain NIC information as we ssh to the nodes. We are not sure where went wrongs with our slice.

      • This topic was modified 3 years, 8 months ago by Xusheng Ai.
      • This topic was modified 3 years, 8 months ago by Xusheng Ai.
      • This topic was modified 3 years, 8 months ago by Xusheng Ai.
      January 15, 2023 at 9:04 pm #3601
      yoursunny
      Participant

        ifconfig is deprecated since Ubuntu 16.

        Try ip link or ip addr command.

        January 16, 2023 at 11:50 am #3602
        Durbek Gafurov
        Participant

          For some reason, now we have to manually turn up the interface.
          You can first install
          sudo apt install -y net-tools

          and

          sudo ifconfig ens7 up && sudo ifconfig ens8 up && sudo ifconfig ens9 up && sudo ifconfig ens10 up

          Alternatively you can use the code below, to turn on all interfaces
          try:
          for node in slice.get_nodes():
          print(“—-“)
          print(“Node:”)
          print(f” Name : {node.get_name()}”)
          for component in node.get_components():
          print(f” Name : {component.get_name()}”)
          for interface in node.get_interfaces():
          print(f” Name : {interface.get_name()}”)
          stdout, stderr = node.execute(f’sudo apt install -y net-tools && sudo ifconfig {interface.get_os_interface()} up ‘)
          except Exception as e:
          print(f”Fail: {e}”)
          traceback.print_exc()

          January 16, 2023 at 1:18 pm #3604
          Xusheng Ai
          Participant
            Durbek Gafurov wrote:

            For some reason, now we have to manually turn up the interface.
            You can first install
            sudo apt install -y net-tools

            and

            sudo ifconfig ens7 up && sudo ifconfig ens8 up && sudo ifconfig ens9 up && sudo ifconfig ens10 up

            Alternatively you can use the code below, to turn on all interfaces
            try:
            for node in slice.get_nodes():
            print(“—-“)
            print(“Node:”)
            print(f” Name : {node.get_name()}”)
            for component in node.get_components():
            print(f” Name : {component.get_name()}”)
            for interface in node.get_interfaces():
            print(f” Name : {interface.get_name()}”)
            stdout, stderr = node.execute(f’sudo apt install -y net-tools && sudo ifconfig {interface.get_os_interface()} up ‘)
            except Exception as e:
            print(f”Fail: {e}”)
            traceback.print_exc()

            Thanks for the information!
            Both methods work well — manually turn up the interface and the code turns on all interfaces.

            January 18, 2023 at 11:23 am #3619
            Xusheng Ai
            Participant

              Is it possible that we can get the MAC address with corresponding NIC?
              For example, below is the information of node 1:

              Name	        Node   Network Bandwidth VLAN	MAC	                Device	Device
Node1-nic1_4-p1	Node1	net4	100	None	06:AC:16:7B:38:FF	ens7	ens7
Node1-nic1_2-p1	Node1	net2	100	None	06:BA:BC:72:F8:34	ens8	ens8
Node1-nic1_3-p1	Node1	net3	100	None	0A:ED:E0:7F:C2:B5	ens10	ens10
Node1-nic1_1-p1	Node1	net1	100	None	0A:70:23:DD:1F:B7	ens9	ens9

              If there is a way that we can get the MAC address of these four NICs?

              • This reply was modified 3 years, 8 months ago by Xusheng Ai.
              January 18, 2023 at 11:55 am #3621
              Alicia Esquivel Morel
              Participant

                Are you using FABlib2 API?

                When you are creating the slice and allocating resources, then you should see your MAC address printed out as well.

                 

                January 18, 2023 at 12:03 pm #3622
                Xusheng Ai
                Participant

                  Yes, The information can be printed.
                  When we create layer 3 network connection, we ran the command: 

                  slice.get_nodes()[2].execute('nfdc face create udp6://[%s]' %slice.get_nodes()[1].get_management_ip())

                  So we didn’t have to copy and past the network information.

                  We was wondering if we could do the same for Layer 2 network connection like:

                  slice.get_nodes()[1].execute('nfdc face create remote ether://[%s] local dev://[%s]' [MAC address],[interface.get_os_interface()])

                  But we are not sure how to acquire MAC address through FABlib API

                  • This reply was modified 3 years, 8 months ago by Xusheng Ai.
                  • This reply was modified 3 years, 8 months ago by Xusheng Ai.
                  • This reply was modified 3 years, 8 months ago by Xusheng Ai.
                  January 18, 2023 at 12:09 pm #3626
                  Alicia Esquivel Morel
                  Participant

                    Oh, okay, then you are trying to create a local ethernet [layer 2] network?

                    I think we can also check here, https://fabric-fablib.readthedocs.io/en/latest/genindex.html

                    With all available methods

                    January 18, 2023 at 12:10 pm #3627
                    Xusheng Ai
                    Participant

                      Thank you so much for the information.

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