MULTI-WAN link showing 'DOWN'


(Vinit Makol) #1

First of all congratulations to all involved. Setting up the server thus far has been a true breeze, and everything(for the most part) has been working smoothly. I am new to the Linux world and must admit that there is a learning curve, but NEthserver has made things very easy.

The only thing I cannot get to work is the ‘MULTI-WAN’. I can see on the dashboard that the interface link is green and OK, but the same connection on the MULTI-WAN is showing ‘DOWN’.

There are two connections with weight 50 and 100.

Connection 1(UP) is static IP weight 50, and 10 Mbps down/2 Mbps up.
Connection 2(DOWN) is static IP weight 100, and 20mbps down/5 Mbps up.

The mode is set to ‘Balance’, and rest are all default values. Any ideas on what I could be doing wrong?

(Michael Träumner) #2

It’s not the same as your problem, but perhaps the solution can help you too:

(Prat) #3

Have played around with various combinations of DNS server settings (Google and ISP provided). Changing the DNS entries did not solve my issue, thus I’m posting details to this thread (after checking multiple other threads related to Multi WAN).

System version: NethServer release 7.5.1804 (rc)
Kernel release: 3.10.0-862.3.2.el7.x86_64

This system has been working for over a year, flawlessly. Last week, we added another NIC, because we got an additional DSL connection (low-bandwidth one). However, when both NIC are plugged in and configured, both show as DOWN in the Multi WAN section of the dashboard (both show OK in the Interfaces section and show Link status is up in the Network section).

Note that if either of them is plugged in independently, the system works fine. Also note that the DSL modems are properly configured and have no connectivity issues.

Original NIC (enp3s0) configuration:

  • IP:
  • Subnet:
  • Gateway:
  • Name: red1
  • Weight: 100

New NIC (enp4s0) configuration:

  • IP:
  • Subnet:
  • Gateway:
  • Name: red2
  • Weight: 10

If anyone could point out what I’ve done wrong, I’d be much obliged! :slight_smile:

(Michael Träumner) #4

I think your gateway configuration is wrong. Who is and

(Prat) #5

Thanks for your response!

In reply to your question… is the LAN IP of the old DSL modem. is the LAN IP of the new DSL modem.

(Michael Träumner) #6

Did you check your DNS settings like mentioned in post 2?

(Prat) #7

Yes, I did.

As I said in my first post, I have played around with various combinations of DNS server settings (both Google as well as ISP provided) in the Nethserver DNS section.

If someone has a running configuration with two red NIC, pretty please drop a line with details on how they have set it up? :slight_smile:

(Michael Träumner) #8

@support_team Has somebody else an idea?

(Filippo Carletti) #9

I have installed a second wan yesterday evening, I had no problems at all, it works.
Having said that, I don’t know what could have gone wrong in your case.
Some commands useful for debugging:

# shorewall status -i | grep Interface
   Interface en2 is Enabled
   Interface en4 is Enabled

To force enabling a disabled interface:

shorewall enable en4

(Prat) #10

Sorry, was offline for the past few days.

Do let me know if I can run any other commands which will provide further information, which I can then share with you.

Meanwhile, if it’s okay with you, could you please share the IP configurations of both your red NIC? Since the configuration of both the DSL modems is in my control, I can try replicating your test setup.

(Prat) #11

@filippo_carletti I set the multi WAN mode to Active backup, and configured the NIC as follows:


enp3s0 - pci Realtek Semiconductor Co. Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)

Link status is up
Speed 100 Mbit/s
Driver r8169
Mac address [redacted]

Role RED

Name: red40
Weight: 100


enp4s0 - pci Realtek Semiconductor Co. Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)

Link status is up
Speed 100 Mbit/s
Driver r8169
Mac address [redacted]

Role RED

Name: red41
Weight: 100

Next, I checked this:

# shorewall status -i | grep Interface
Interface enp3s0 is Disabled
Interface enp4s0 is Disabled

Thus, ran the command you provided, to get both of them up. So, in the Dashboard section, the Multi WAN section showed both as UP.

However, still unable to get internet access. Tried ping from the server:

# ping
ping: Name or service not known

Please note that this server has the ASUS H270M Plus motherboard with the problem where, on switching on the server, we need to run the “signal-event interface-update” command to get the network up. Please refer to this post where you and @giacomo have advised us, previously: Networking issues after installing AD

The weird thing is, we have to physically unplug any one of the two NIC and only then does the system work (after running the “signal-event interface-update” command). Simply releasing the role doesn’t work.

Please let me know if there’s any further data I can provide you, to help figure this out.

(Prat) #12

Have fixed the problem. @filippo_carletti, @giacomo please note that it seems that Nethserver is unable to handle static IP settings.

Following was the fix, for anyone else struggling with the issue:

  1. Release roles of both the red NIC
  2. Switch both modems to DHCP mode and perform DHCP IP reservation for both the red NIC
  3. Configure the red NIC in Network section, as required
  4. Reboot!

Note that switching over to DHCP has also fixed the issue where the network would remain down (on restart) and we had to run the “signal-event interface-update” command.

Thanks for everyone’s help! :slight_smile: