I think you need policy routing:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/configuring-policy-based-routing-to-define-alternative-routes_configuring-and-managing-networking
https://doc.lagout.org/network/inetdoc/Policy_Routing_in_Linux_ENG.pdf
Although it may be tempting to use some sort of round-robin, it would be
safer to have specific rules based on the destination, so for example you
send all web traffic to one ISP and add exceptions to route specific
traffic to the second ISP (e.g. streaming platforms), with each rule having
a "backup route" to the other ISP.
Cheers,
Lorenzo
Il giorno ven 12 mar 2021 alle ore 08:31 Thomas Stephen Lee <
lee.iitb at gmail.com> ha scritto:
> On Wed, Feb 17, 2021 at 2:04 AM Kenneth Porter <shiva at
sewingwitch.com>
> wrote:
> >
> > --On Tuesday, February 16, 2021 12:00 PM +0530 Thomas Stephen Lee
> > <lee.iitb at gmail.com> wrote:
> >
> > > The solution should be a software one without acquiring new
hardware.
> > > What is ideal is the bandwidth of two connections and half
bandwidth
> > > when one link is down.
> >
> > The search term you're looking for is "NIC bonding".
Here's the first
> hit I
> > get from Google:
> >
> > <
>
https://www.enterprisenetworkingplanet.com/linux_unix/article.php/3850636/Understanding-NIC-Bonding-with-Linux.htm
> >
> >
>
> Hi,
>
> I tried
>
>
>
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/configuring-network-bonding_configuring-and-managing-networking#configuring-a-network-bond-using-nm-connection-editor_configuring-network-bonding
>
> without success
>
> I have a feeling that bonding is for interfaces on the same network,
> not two internet routers.
> Please correct me if I'm wrong.
>
> ---
> Lee
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