Network/Switch tab on LuCI WebUI Clusterbox Dashboard explanation

Mixtile Blade 3 (Mixtile Cluster Box)
#1

Good morning
Can you help me understand the tab in question?

Switch “switch0” (mt7620), ports: 8 (cpu @ 6)

What exactly does the wording “ports: 8 (cpu @ 6)” mean?

VLANs on “switch0” (mt7620), ports: 8 (cpu @ 6)
VLAN ID Description CPU (eth0) LAN 1 LAN 2 WAN

I understand that we are dealing with two VLANs (so not a simple error in history*):

Is VLAN 1 a VLAN between Blade3 N1 and Blade3 N2?
Is VLAN 2 a VLAN between Blade3 N3 and Blade3 N4?

So:

CPU(eth0) is the pcie network?
LAN 1 is something like br_lan?
LAN 2 ?
WAN is eth0.2?

*At first glance (and for about a little month thereafter) it immediately seemed to me “the antechamber of death of my control board” :slight_smile: :: a place where you touch something and you risk your salary in short!

By the way, what happens when I turn off the feature?

Thanks guys!!

#2

You can refer to the following introduction.

The CPU (eth0) is the core of all ports and is used to manage VLAN data.

LAN (br-lan)

Ports 0 and 1 form the LAN.
Connect to the CPU through eth0.1.
Use 169.192.1.1 as the IP address

WAN (external network)

Port 5 is used as the WAN.
eth0.2 is responsible for connecting to the external network.
Obtain an address through DHCP.

VLAN

VLAN 1 (LAN): eth0.1, ports 0,1,6t.
VLAN 2 (WAN): eth0.2, ports 5,6t.

Device Name Type Function Notes
lo Virtual device Local loopback interface Only used for internal communication within the device
pci0 Physical device PCIe Ethernet PCIe network card
br-lan Logical bridge LAN port bridge Connects to eth0.1
eth0 Physical device Switch chip connected to CPU Responsible for all VLAN transmissions
eth0.1 VLAN device VLAN 1 (LAN) Connected to br-lan
eth0.2 VLAN device VLAN 2 (WAN) Directly connected to the external network
switch0 Switch chip Port management Responsible for VLAN allocation

about Blade3

The pci0 of mt7620 and Blade3 N1 ~ N4 pci0 form a LAN

Routing Configuration for Clusterbox
#3

It seems understandable and important to me.

I wonder: by disabling the service I will not run any risks, right? I gather the VLANs into a single LAN and keep all the services and connections active!?

VLAN 1 (LAN): eth0.1, porte 0,1,6t.

Are ports 0 and 1 then the IPv4 and IPv6 of the br-lan interface?

VLAN 2 (WAN): eth0.2, ports 5,6t.

It makes me think that ports 5 and 6 refer to the IPv4 and IPv6 connections of our WAN interfaces.

Port 5 is used as the WAN.
eth0.2 is responsible for connecting to the external network.
Obtain an address through DHCP.

Is port 6 then shared between VLAN 1 and VLAN 2? In this case, can WAN IPv6 be useful to connect to the CPU in case the other interfaces unfortunately remain unavailable?

What exactly do LAN 1 and LAN 2 on the column refer to? Maybe to br-lan and eth_pci?

Even if the rest will seem trivial to me in comparison:

The pci0 of mt7620 and Blade3 N1 ~ N4 pci0 form a LAN

Does this mean that the Blade3 N1, N2, N3, N4 via pci0 and mt7620 via pci0 form a LAN? In this case, could you tell me why I can’t find them all in my “nmap 10.20.0.0/24”? To tell the truth, I always find them two by two, the one from which I connect Blade3 and the adjacent one; my problem was exactly that of being able to reach each one through a PCIe connection, perhaps without routing and forwarding.

I’ll try again tonight at home. Maybe I manually set the connection and despite having entered the DNS correctly, the /etc/hosts file takes precedence causing the correct routing to be missing (!?). In this case I can recommend to execute a cluster reboot via:

ssh clusterbox [editor’s note 10.20.0.1] nodectl reboot -all && sudo reboot.

Instead set the host names via WebUI Network/DHCP DNS or via the file on clusterbox /etc/config/dhcp. In fact it seems that a normal reboot of the ClusterBox following a disconnection of a Blade3 does not restore the initial correct situation, this also – by the way – by running DHCP as auto on Blade3 SBCs.

Thank you very much.