Can you have two default gateways?

Can you have two default gateways?

No, it can’t have more than one active default gateway. Any operating system can have multiple default gateways configured (technically a route to the unspecified address, i.e. 0.0.

How do I add two default gateways in Linux?


  1. Initial Position. We will assume that we have two interfaces: eth0 and eth1.
  2. Adding a Second Routing Table.
  3. Configuring the New Routing Table.
  4. Routing Rules.
  5. Making the Configuration permanent.
  6. More than Two Network Cards or Gateways.
  7. Testing the Configuration.

Why do I have 2 default gateways?

Most likely cause: multiple NICs. For instance, wired (Ethernet) and wireless (Wi-Fi). Maybe multiple “network adapters” including something like a VPN (not necessarily a physical card). Under each adapter, TCP/IP settings, you can go to an Advanced options screen to add a default gateway.

How do I add a second interface to Ubuntu?

To add secondary IP address permanently on Ubuntu system, edit the /etc/network/interfaces file and add the required IP details. Verify the newly added IP address: # ifconfig eth0 Link encap:Ethernet HWaddr 08:00:27:98:b7:36 inet addr:192.168.

How do I configure two network interfaces with different gateways?

Creating Routes & Rules Next we add two routes. One for the subnet so that the IP address can find its gateway. Another for specifying the default gateway for that interface. Finally, we add policy route rules for ONLY that IP address that we want to use that table.

What is Iproute2 in Linux?

Introduction. Iproute2 is a collection of utilities for controlling TCP / IP networking and traffic control in Linux. ip controls IPv4 and IPv6 configuration and tc stands for traffic control. Both tools print detailed usage messages and are accompanied by a set of manpages.

How do I remove multiple default gateways?

Double click on Network Adapter from the Network Connections and click Properties. Then double click the Internet Protocol (TCP/IP) and click Advanced. On the Advanced TCP/IP Settings page, please double check if there are any other default gateways listed. If so, please remove them and click OK.

What happens if you don’t have a default gateway?

Originally Answered: What Happens If I Don’t Have a Default Gateway? If you don’t have it in your LAN, you will be able to communicate with other devices in the same lan through the power of switching. Downside of it is that you won’t be able to communicate with anyone outside your local network.

How do I create a virtual network interface in Ubuntu?

2 Answers

  1. USE CASE: To create a persistent VIP address in a server to function as a ‘loopback’ address.
  2. Change to /etc/systemd/network/ directory [email protected]:~$ cd /etc/systemd/network/
  3. Create two files, ‘vip.netdev’ and ‘’ [email protected]:/etc/systemd/network$ touch vip.netdev

How do I connect two network interfaces on the same subnet?

The recommended solution is to use a single interface or a single bond/team interface, then add the other IP addresses to that interface in the form of an alias IP address. If fault tolerance and/or load balancing is required at the network interface level, then an alias on a bond or team should be used.

Can I have two NICs on the same subnet?

Configuring two or more NICs on the same subnet may cause communication problems. One of the most common scenarios resulting in multiple NICs being assigned to the same subnet is when both a wired and wireless interface are used to connect to the same network.

Can I have two default gateways under Linux?

This article will describe the setup for two or more default gateways under Linux. You have built two or more network cards into one Linux system and each of these cards has its own default gateway.

What does the second command set the default gateway to?

The second command sets the default gateway. So that the system knows when to use our new routing table, two rules must be configured. These rules say that both traffic from the IP address,, as well as traffic directed to or through this IP address, should use the rt2 routing table.

What are the two networks that should be used with Debian?

The two networks that should be used are and, whereby the first IP address in each respective network should be the gateway. Under Debian, the initial configuration would appear as follows. /etc/network/interfaces

What is the default getway in Linux?

Normally, in a Linux host with multiple network interfaces, you have a default getway that is basically routed. Everything else produces asynchronous routing in the system and routers the packages may possibly discard.