how can i dynamically change the gateway?

[Michele Salerno]

Hi,
if the gateway is down (disconnected wan cable), bird works.
On the router with the cable disconnected bird must say: use the 
wireless gateway not the wan. example:
Router A, B, C, D
C cut the wan cable
All routers communicate with each other over the mesh, but C can't get 
to the Internet.
Bird needs to tell C to use A, B or D as gateway.


Il 04/09/22 04:48, Brandon Zhi ha scritto:
> Hi,
>         I'm trying to understand the thing that you want to do. So if 
> the GW is down, then babel is down too. Maybe you could announce 
> 0.0.0.0/0 <http://0.0.0.0/0> by babel when babel is down, the GW will 
> change.
>
>
>
>
> On Thu, 1 Sept 2022 at 22:28, Michele Salerno <mikysal78 at gmail.com> wrote:
>
>     Hi, I have this script that configures routes for me between
>     different routers and servers.
>     I have a few routers that have down in the wan and connect with
>     the mesh network.
>     How can I dynamically change the gateway?
>     Example: if the wan drops, use the mesh as the gateway.
>
>
>     # Configure logging
>     log syslog all;
>     log "/var/log/bird.log" all;
>     log stderr all;
>     router id from "br-lan";
>
>     # Sync bird routing table with kernel
>     protocol kernel kernel4 {
>          description "Kernel protocol for IPv4";
>          metric 50;
>          ipv4 {
>              table master4;
>              export filter {
>                  if proto = "lan" then reject;
>                  accept;
>              };
>              import all;
>          };
>     };
>
>     protocol kernel kernel6 {
>          description "Kernel protocol for IPv6";
>          metric 300;
>          ipv6 {
>              table master6;
>              export filter {
>                  if proto = "lan" then reject;
>                  accept;
>              };
>              import all;
>          };
>     };
>
>     protocol device {
>          description "Device protocol";
>     };
>
>     protocol direct lan {
>          description "LAN protocol";
>          ipv4;
>          ipv6;
>          interface "br-lan";
>          check link;
>     }
>     protocol babel ninux {
>          description "Babel protocol for NINUX network";
>          ipv4 {
>              export where (source = RTS_DEVICE) || (source = RTS_BABEL);
>          };
>          ipv6 {
>              export where (source = RTS_DEVICE) || (source = RTS_BABEL);
>          };
>          interface "vpnbas" {
>              check link;
>          };
>     ## Used to connect with other neighbours on the same layer 2 network.
>     ## Decomment the config to use it, not this comments of course!
>     ## Use the correct name interface, not the logical openwrt/(l)uci one.
>     ## You can define more interfaces maches using * in regex (like "ifnet*")
>     ## or "ifnet1", "ifnet2", "ifnetN", "otherifnetnames" form.
>     ## You can also define more interfaces with other parameters, please refer to:
>     ##https://bird.network.cz/?get_doc&v=20&f=bird-6.html#ss6.1  <https://bird.network.cz/?get_doc&v=20&f=bird-6.html#ss6.1>
>     ## After, reload the bird daemon with: /etc/init.d/bird reload
>     ## or if you perefer, reastart with: /etc/init.d/bird restart
>          interface "mesh" {
>              type wireless; # or wired
>              check link;
>          };
>     }
>
>
>
> -- 
> *Brandon Zhi*
> HUIZE LTD
>
> www.huize.asia <https://huize.asia/>| www.ixp.su 
> <https://www.ixp.su/> | Twitter
>
>
> This e-mail and any attachments or any reproduction of this e-mail in 
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>
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