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

[Xusheng Ai]

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 1 year, 10 months ago by Xusheng Ai.
• This topic was modified 1 year, 10 months ago by Xusheng Ai.
• This topic was modified 1 year, 10 months ago by Xusheng Ai.

[yoursunny]

ifconfig is deprecated since Ubuntu 16.

Try ip link or ip addr command.

[Durbek Gafurov]

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()

[Xusheng Ai]

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.

[Xusheng Ai]

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 1 year, 10 months ago by Xusheng Ai.

[Alicia Esquivel Morel]

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.

 

[Xusheng Ai]

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 1 year, 10 months ago by Xusheng Ai.
• This reply was modified 1 year, 10 months ago by Xusheng Ai.
• This reply was modified 1 year, 10 months ago by Xusheng Ai.

[Alicia Esquivel Morel]

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

[Xusheng Ai]

Thank you so much for the information.

[Author]

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