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Subject: Re: Bridging a vlan trunk with a gif tunnel?
To: Hauke Fath <hf@spg.tu-darmstadt.de>, freebsd-net@freebsd.org
References: <20180401164209528151.6f554119@spg.tu-darmstadt.de>
From: Eugene Grosbein <eugen@grosbein.net>
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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).

> 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.