Bridging a vlan trunk with a gif tunnel?

[Julian Elischer]

On 1/4/18 11:58 pm, Eugene Grosbein wrote:
> 01.04.2018 21:42, Hauke Fath wrote:
>
>> I am trying to network a remote site with a main site through a bridged
>> gif tunnel, and it doesn't work for me.
> gif(4) supports only untagged frames when added to a bridge.
> You need to create gif-per-vlan or switch to newer vxlan(4).

I have in the past implemented this using netgraph and vnet
but it was quite a log time ago and I forget many of the details
The vnet jail was so that the gif tunnel effectively left from
"another machine" (it was the same machine with a vnet jail)
The reason was so that net failures were "one hop away" and
therefore not so hard to work around.

>> In the past, I have set up a similar link by tunneling ip over gif, but
>> routing turned out to be intricate
> what problems do you have with routing over gif? It works just fine for me.
>
>> and I figured just bridging the exclave with the main site would save me routing issues,
> And bring in bridging issues that are more severe.
>
>> plus I could  stick with the existing subnets.
> And have extra overhead to pass +14 bytes of headers of MAC addresses per frame.
>
> Single gif+bridge does not support trunks.
>
>
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