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Re: [Question #78328]: How to choose network card for output connection?

 

Question #78328 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/78328

    Status: Open => Answered

actionparsnip proposed the following answer:
no, the whole idea of routing is to use logic to determine which
interface the next hop is to a destination. Therefore you MUST set the
interface name or the packet will not know where to travel to reach its
destination.

The default in all OSes is to use the interface that matches the network
mask OR to use the only adapter with a default gateway to allow the
intelligence in the infastructure to work out where it needs to go.
These use the exact same principal as I ave stated above. If you wish to
change this, you can with the route command to add static routing
information to shape the traffic as you wish and make some addresses or
address ranges use different physical interfaces.This is one way you can
connect to multiple wireless accesspoints to gain speed, however if all
traffic is from the same location it will only use the defined interface
and therefore only one connection.

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