Re: IP connectivity issue at openwrt nodes

[Sven Eckelmann <sven@narfation.org>]

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On Tuesday, 19 November 2024 15:17:28 CET Mu De wrote:
> Dear Sven,
> 
> I would like to ask generic system and topology questions:

Sorry about the "hijack part". Looked at first glance like another person + 
topic. Simply because you've used a different from + signature and suddenly 
added other persons in Cc.

> 1-)Generic System Question
> According to info at the "
> https://www.kernel.org/doc/Documentation/networking/batman-adv.txt" , if
> following "batman-adv" folder do not exist, your interface might not be
> supported.
> If those folder does NOT exist in a system but interfaces can be
> add/removed via "batctl if" command, and outputs indicates interface
> active, can we consider this system works properly?
> 
> "/sys/class/net/eth0/batman_adv/"

This is an outdated document. See 
https://www.kernel.org/doc/html/latest/networking/batman-adv.html for the 
correct one

> 2-)Generic Topology Question
> Consider multiple batman nodes, each have 1 bridge interface, bridge have
> two ports, one "bat0" and "eth0",

Ok, ethernet bridge to mesh

> and IP is assigned to the bridge node.

Ok

> At
> each node, multiple wired/wireless interfaces which have stable connections
> to other nodes are assigned to "bat0" and these interfaces are indicated as
> "active" via batctl.

Ok, the underlying interfaces for bat0 have "redundancy"?

> Can local process of batman nodes and external non-batman nodes connected
> to "eth0" port of the bridge, have IP connectivity to each other via IP
> addresses assigned to bridges?

Yes. The bridge is handling this part - not batman-adv. Just make sure that 
you don't have any IP conflicts. So, for example eth0 + bat0 + underlying 
interfaces for bat0 should most likely have no IP address assigned - unless 
you know what you are doing and need it for debugging (or similar things).

Kind regards,
	Sven

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