How to add a bond to a bridge interface

Installing and Using OpenWrt Network and Wireless Configuration
1

Hi!
How to add a bond to a bridge interface?

2

Create bridge, create bond, enslave interfaces to bond, add bond to bridge, assign address to bridge if needed?

3

Well...
the bond needs a IP and mask assigned... otherwise it isn't started.
Can I omit the IP configuration in the bridge/lan interface section or how is this supposed to work?

I tried this

config device
	option name 'br-lan'
	option type 'bridge'
	option ageing_time '14410'
	list ports 'bond-lan'

 config interface 'lan'
	option proto 'bonding'
	option force_link '1'
	option ipaddr 'x.x.x.x'
	option netmask '255.255.255.0'
	option ip6assign '64'
	list slaves 'eth0'
	list slaves 'eth1'
	option bonding_policy 'balance-rr'
	option packets_per_slave '1'
	option all_slaves_active '0'
	option link_monitoring 'off'

The bond comes up and seems to work but no bridge interface is created.

4

On Linux you can not add interfaces to a bridge if the interface holds an IP address. Only the bridge can be assigned addresses.

5

So, how to create the bond without an IP address?

6

?

Just remove the IP config from the interface stanza?

7

As I wrote in my first post the bond interface needs an IP/Mask assigned otherwise the netifd script throws a error.
I tried to remove the condition check from the script but it still doesn't work.

8

You might want to take a look at this code for some inspiration - it's a good number of years old, but it sets up a bond interface for aggregating multiple internet connections.

9

Thanks, I found this too.
But I would rather have a solution that works natively out of the box.

10

That was (for me) not quiet clear.

I would suggest to write a bug report.

Either try to patch it by your self or for the time being, bring the interface up with a simple script. I.e. hook on the bridge and after it's created, create the bond by a simple one shot script and add it to your bridge :man_shrugging:
And like I said, yes, this sounds like a bug based on wrong assumptions. I would expect, too, that I can create a bond without an IP address config.

Edit. Ps: try to reply to a post so the other one gets notified.

11

You can't use this anyway since it's designed to bond two links together and requires a kernel patch.

However, the procedure for creating a bond interface and adding slaves to it becomes clear if you read the code, hence the suggestion to "use it as inspiration" instead of shooting in the dark