Re: [lwip-users] two logical ethernet interfaces on the same, physical port?

[Kamil Khoury]

Actually I don't want to have two different IP addresses on the same ethernet port because the protocol I'm trying to implement works on layer 2. If you take a look at the picture in the original message it specifies two logical Ethernet ports and the protocol says: "the node communicates with the network via two logical interfaces based on a single physical port". 

I can distinguish the two logical Ethernet ports I created by netif_add() by giving them two different MAC addresses but the problem is that the destination MAC of all received messages is a MULTICAST address which means, the two logical interfaces won't be able to identify which of them should handle the received message.

I'm not sure if my problem is clear, but I guess the image says it all.
Thanks,

On Thu, Jun 14, 2018 at 3:42 PM, Sergio R. Caprile <address@hidden> wrote:

(crossposted from the developers' list)
So, summing up, you (the OP) want to have two IP addresses on one
Ethernet (physical) port. This has been asked several times on the list,
under several different subjects, and is perhaps hard to find. I suggest
you do some searches on the list.

Perhaps we can contribute with something for the wiki or the docs ?

First of all: networking.
- How do you plan to have your IP hosts arranged ?
-- Will they be in different subnets ? (Will you route ?)
-- Will they be in the same subnet ? (Will you bridge ?)

lwIP has several hooks that can help you go either way, and some users
have already done this in the past. So...

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