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Use two Wi-Fi cards on the same network

ItzNextise_ Posted messages 3 Status Member -  
brupala Posted messages 111137 Registration date   Status Member Last intervention   -
Hello,
I would like to know if it is possible to connect two Wi-Fi cards to the same computer and on the same network, as Orange is providing such a bandwidth shared among devices. Having two Wi-Fi cards connected could simulate two devices and double my Wi-Fi if I understand correctly...
Best regards.

Configuration: Windows / Chrome 98.0.4758.102

1 answer

  1.
    brupala Posted messages 111137 Registration date   Status Member Last intervention   14 440
     
    Hi,
    No, never.
    Two Wi-Fi cards must be connected to two different networks, like all network cards, but with Ethernet, we can configure them in an aggregate mode that allows multiple Ethernet ports to be grouped into a single connection.
    But that doesn't exist in Wi-Fi.
    Anyway, it wouldn't serve any purpose: the Wi-Fi network is a shared network, and each card that wants to transmit must wait for another to finish; the speeds do not therefore add up, and the router only sends data to one card at a time; it's each in turn.

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    1. jee pee Posted messages 31883 Registration date   Status Moderator Last intervention   9 979
       
      Hello, if the box has 2 networks, WiFi 2.4GHz and 5GHz for example. Can we then have 2 connections on the same box?

      Afterwards, I don't see how to individually choose one or the other as an output. And in the case where it is possible, would it require 2 distinct tasks to use the 2 links, with a potential gain compared to the other PCs connected to the local network?
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      1. brupala Posted messages 111137 Registration date   Status Member Last intervention   14 440 > jee pee Posted messages 31883 Registration date   Status Moderator Last intervention  
         
        In fact,
        there are several problems with doing this:
        at the IP level first,
        if a single machine has only one interface in the same IP network, it's for routing, then at the ARP level, there is one MAC address per IP address (IPv4 or IPv6 even if there is no ARP).
        After that, with Wi-Fi, it's true that two different radio networks could do this better (one alone cannot do it at all), but the two IP connections, even if they have different IP addresses, one will be prioritized at the routing level (see metric) for the same route.
        It would then be necessary to perform source routing via specific applications that will modify the tables deep in the system or set static routes to well-defined addresses.
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