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Date:      Fri, 23 Oct 2020 08:40:49 -0400
From:      D'Arcy Cain <darcy@druid.net>
To:        Paul Vixie <paul@redbarn.org>
Cc:        Jason Tubnor <jason@tubnor.net>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>
Subject:   Re: When is a switch not a switch?
Message-ID:  <e6936bf5-1344-e7e7-afdb-1e9c6323f37c@druid.net>
In-Reply-To: <42e3d3f2-7cf3-568e-8714-086c699e9c33@redbarn.org>
References:  <57c32e6d-5572-3d3b-1a57-f3064bee7dc2@druid.net> <20201020065630.GE8272@funkthat.com> <CF189122-7D85-4BF1-9172-75D3EE0E77FB@punkt.de> <3ed627e2-d99a-107e-4135-8aef1ad4ec71@druid.net> <30A67F82-312E-4651-A5E7-2E2AD926FF24@punkt.de> <973b1b56-817f-6976-e5d3-34cfbc373b13@druid.net> <A075C069-1F89-428C-BDB7-7A9F44A4E283@punkt.de> <723CA318-80E9-4A6B-91ED-E791A40CC2C0@punkt.de> <6267599d-bc0c-6d63-bb19-1fc695e53997@druid.net> <CACLnyCJmLcRe-19iy2eZY8gxF9PGbzvaudTGEFcAHaMidL8XAw@mail.gmail.com> <b39bb54e-dd49-e7b6-5493-41f40a9ee74a@druid.net> <42e3d3f2-7cf3-568e-8714-086c699e9c33@redbarn.org>

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From: D'Arcy Cain <darcy@druid.net>
To: Paul Vixie <paul@redbarn.org>
Cc: Jason Tubnor <jason@tubnor.net>,
 "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>
Message-ID: <e6936bf5-1344-e7e7-afdb-1e9c6323f37c@druid.net>
Subject: Re: When is a switch not a switch?
References: <57c32e6d-5572-3d3b-1a57-f3064bee7dc2@druid.net>
 <20201020065630.GE8272@funkthat.com>
 <CF189122-7D85-4BF1-9172-75D3EE0E77FB@punkt.de>
 <3ed627e2-d99a-107e-4135-8aef1ad4ec71@druid.net>
 <30A67F82-312E-4651-A5E7-2E2AD926FF24@punkt.de>
 <973b1b56-817f-6976-e5d3-34cfbc373b13@druid.net>
 <A075C069-1F89-428C-BDB7-7A9F44A4E283@punkt.de>
 <723CA318-80E9-4A6B-91ED-E791A40CC2C0@punkt.de>
 <6267599d-bc0c-6d63-bb19-1fc695e53997@druid.net>
 <CACLnyCJmLcRe-19iy2eZY8gxF9PGbzvaudTGEFcAHaMidL8XAw@mail.gmail.com>
 <b39bb54e-dd49-e7b6-5493-41f40a9ee74a@druid.net>
 <42e3d3f2-7cf3-568e-8714-086c699e9c33@redbarn.org>
In-Reply-To: <42e3d3f2-7cf3-568e-8714-086c699e9c33@redbarn.org>

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On 10/22/20 6:50 PM, Paul Vixie wrote:
> here's how i do it, per years-ago documentation to this effect:
>=20
>> autobridge_interfaces=3D"bridge0" autobridge_bridge0=3D"tap* igb1"=20

Will that work if I have two networks?

autobridge_interfaces=3D"bridge0" autobridge_bridge0=3D"tap* bge0"
autobridge_interfaces=3D"bridge1" autobridge_bridge1=3D"tap* bge1"

Seems like it would get confused about which tap to assign to which bridg=
e.

>> ifconfig_igb1=3D"up media 1000baseTX fib 1" cloned_interfaces=3D"bridg=
e0 tap0=20
>> tap1 tap2 tap3 tap4 tap5 tap6 tap7"

Again, they aren't all assigned to one bridge.  Probably the even taps wo=
uld=20
go to one and the odd taps to the other but that's not guaranteed.

>> ifconfig_bridge0=3D"inet 24.104.150.210/27 fib 1"=20
>> ifconfig_bridge0_ipv6=3D"inet6 2001:559:8000:cd::2/64 fib 1 auto_linkl=
ocal up"
>> ifconfig_tap0=3D"up fib 1"
>> ifconfig_tap1=3D"up fib 1"
>> ifconfig_tap2=3D"up fib 1"
>> ifconfig_tap3=3D"up fib 1"
>> ifconfig_tap4=3D"up fib 1"
>> ifconfig_tap5=3D"up fib 1"
>> ifconfig_tap6=3D"up fib 1"
>> ifconfig_tap7=3D"up fib 1"
>=20
> note, fib 1 is a detail here, just gives me a different default route f=
or=20
> the virtual machines.

In my case I want to make the default route the same as the host's.

> autobridge_* (rc.conf(5)) is what you'll need for that.

See above.

--=20
D'Arcy J.M. Cain <darcy@druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 788 2246     (DoD#0082)    (eNTP)   |  what's for dinner.
IM: darcy@VybeNetworks.com, VoIP: sip:darcy@druid.net

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