Date: Tue, 21 Aug 2007 11:48:40 +0100 From: Tom Judge <tom@tomjudge.com> To: Mohacsi Janos <mohacsi@niif.hu> Cc: freebsd-hackers@freebsd.org Subject: Re: vlan taggging on etherchannel Message-ID: <46CAC308.7070509@tomjudge.com> In-Reply-To: <20070821113922.B40614@mignon.ki.iif.hu> References: <20070821113922.B40614@mignon.ki.iif.hu>
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Mohacsi Janos wrote:
> Dear All,
> What is the recommended way to configure vlan interfaces on
> etherchannel bonded interfaces in a failure mode. I found, that
> etherchannel is supported by ng_fec(4) (but not exactly what I want) and
> also found that there two? way of configuring vlans: vlan(4) and
> ng_vlan(4). But I did not found any description or configuration snippet
> to configure both preferentially via /etc/rc.conf neither in FreeBSD
> 6.x-stable, neither in FreeBSD-7.0-current. What I want to achieve:
>
> [switch1]-----GE---bge0----\ /----vlan100
> }=={-----vlan101
> [switch2]-----FE---bge1----/ \----vlan102
> \---vlan103
>
>
> I would like to prefer all the vlans via bge0 with GE towards switch1.
> And use only bge1 in case of switch1 or bge0 link failure.
>
> I could use bond on Linux for this purpose. How to achieve similar setup?
>
You may want to take a look at if_lagg, it supports EtherChannel (AKA
fec), LACP and failover modes (Which is what you would need). It is
available in RELENG_6 and Current.
You may wish to take a look at:
http://nzfug.nz.freebsd.org/nzfug/HandbookUpdates/NetworkAggregation
rc.conf entries for the example might look like (not tried this):
cloned_interfaces="lagg0"
ifconfig_lagg0="laggproto lacp laggport fxp0 laggport fxp1"
As for the vlan interfaces we use if_vlan and rc.conf snippets look as
follows:
cloned_interfaces="vlan1 vlan2"
ifconfig_vlan1="inet x.x.x.x/24 vlan 1 vlandev bge1"
ifconfig_vlan2="inet x.x.x.x/24 vlan 2 vlandev bge1"
Putting these to together for you use might look like this:
cloned_interfaces="lagg0 vlan100 vlan101 vlan102 vlan103"
ifconfig_lagg0="laggproto failover laggport bge0 laggport bge1"
ifconfig_vlan100="inet x.x.x.x/24 vlan 100 vlandev lagg0"
ifconfig_vlan101="inet x.x.x.x/24 vlan 101 vlandev lagg0"
ifconfig_vlan102="inet x.x.x.x/24 vlan 102 vlandev lagg0"
ifconfig_vlan103="inet x.x.x.x/24 vlan 103 vlandev lagg0"
Tom
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