2 OWrt24 Routers - switch from direct connect with ISP switch to daisy chained

Hi,

I am trying to change how the 2 Routers are connected due to relocation of furnitures:

Original, working setup:

R1.wan ISP.Switch R2.wan

Both R1 & R2 with OpenWrt 24.10.1 or Snapshot. Both can got IPv4 & IPv6 address from ISP Switch. Both respective LAN/Wifi clients can access Internet. R1 & R1 can ping each other's public IPs.

Due to Internal Furniture relocation, I need to connect like this, physically:

ISP Switch R1 R2

Can I make both R1 & R2 work like before? That is both got IPv4 & IPv6 address from the ISP Switch, and both allowing downstream LAN/Wifi clients access Internet?

If I understand correctly, you want to connect R1 to the ISP switch and then connect R2 to R1, right?

To keep the same functionality, on R1 you need to bridge the wan and some of the lan ports and connect R2 to that lan port.

The method of implementation depends on R1 - swconfig or DSA, multi-bridge support if DSA and so on ...

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My hardware is Dynalink WRX-36 - which I guess is with DSA.

Output of brctl show br-lan

# brctl show br-lan
bridge name	bridge id		STP enabled	interfaces
br-lan		7fff.2ceadcc39806	no		lan4
							lan2
							lan3
							lan1

How can I check if it supports multi-bridge or not?

Try this configuration first:

config device
        option type 'bridge'
        option name 'br-lan'
	    list ports 'lan1'
	    list ports 'lan2'
	    list ports 'lan3'


config device
        option type 'bridge'
        option name 'br-wan'
	    list ports 'wan'
	    list ports 'lan4'

config interface 'wan'
        option device 'br-wan'
	    ...

If brctl does not show both bridges correctly, you need to switch to bridge VLAN filtering.

https://openwrt.org/docs/guide-user/network/dsa/dsa-mini-tutorial#multiple_networks_using_vlans

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Thank you very much!

br-lan + br-wan at R1 works. R2 can got IPv4 & IPv6 address.

I will with R2 for normal connections and see how it performs.

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