You can easily extend this setup to include multiple wlan devices. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Is it possible to have multiple default gateways for outbound connections?
Ask Question. Asked 4 years, 8 months ago. Active 2 years, 11 months ago. Viewed 63k times. I have researched that topic and found the following interesting information: When a program initiates an outbound connection it is normal for it to use the wildcard source address 0. Is that possible? What do I need to do to achieve such a functionality?
Improve this question. Very briefly: Several default routes will pick one interface at random, which leads to trouble because the assigned IP is different. What you want is multihoming or bundling , which is difficult to do, see e.
You can use dynamic failover with bonding. There is no need to fiddle with default routes. Add a comment. Active Oldest Votes. This is my final setup: 3 NICs: eth0 wire , wlan0 built-in wifi, weak , wlan1 usb wifi adapter, stronger signal than wlan0 All of them on a single subnet, each of them with their own IP address.
If eth0 fails then wlan1 should be used. If wlan1 fails then wlan0 should be used. Let's call them rt1, rt2 and rt3 reserved values local main default 0 unspec local 1 inr. This is the main part and I'll try to explain as much as I can: auto eth0 wlan0 allow-hotplug wlan1 iface lo inet loopback iface eth0 inet static address Let's take a look a the main route table with ip route show : default via Improve this answer.
JohannesM 7 7 bronze badges. Try making a connection that takes longer e. The scp session will break because the IP address changes. You could try using withsctp to keep the connection alive in such a case or use rsync instead of scp to contine the transfer from the point where it stopped. This switch can occur when there are multiple gateways configured for the same network adapter or when different default gateway addresses are given on various network cards on a multihomed computer.
A switch is triggered when TCP has tried one-half of the TcpMaxDataRetransmissions times to send a packet through the current default gateway. After the switch, all IP traffic originating from any network adapter on this computer destined for remote networks will be sent to the currently selected gateway. On disjointed networks, this can lead to lost connectivity and subsequent termination of active sessions with computers on remote networks connected through the first gateway.
This is because the currently selected gateway may be unaware of other routes managed by the first gateway if those routers do not exchange routing information to each other.
If the switched gateway is unreachable or inactive on the network, it loses connectivity to all remote sites. At this point, a ping to this computer from a remote network will fail to get a positive response. Similarly, any outgoing ping to a remote host from this computer will give a Request timed out error. Consider a computer with two network cards, Netcard1 and Netcard2, and the following IP addresses and default gateways:. Netcard1: IP Address: If you want to Telnet to a workstation with an IP address of If You shouldn't be using XP anyway.
You can check if you have two default gateways with route print command. Default gateway is there, where both network address and network mask are assigned to 0. It either uses the first default gateway it decides to use, sometimes randomly and with weird results, or it loses the ability to connect altogether.
You run a script using route delete to remove default gateways 0. Basically, you want one default gateway and the rest will be gateways to specific subnets either internal or external.
For the non-default-gateway routes, you have to be very network specific. Alternately, there are ways to make windows behave properly with RIP, but I don't use RIP on any of my networks so I'm not the one to explain how it works. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. How does a Windows computer behave when it has multiple default gateways? Ask Question. Asked 7 years, 7 months ago. Active 4 months ago. Viewed 41k times. Improve this question. Sopalajo de Arrierez 6, 10 10 gold badges 57 57 silver badges 93 93 bronze badges. Snake Hernandez Snake Hernandez 73 1 1 gold badge 1 1 silver badge 4 4 bronze badges. You need to give us more details. Windows computers can't use multiple default gateways.
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