Re: vlan taggging on etherchannel

Arne Schwabe wrote:
Tom Judge schrieb:
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.
If the switches don't support LACP/Fec over two devices use bridge_stp
to simulate a switche and let spanning-tree do the failover.

Arne

Spanning tree may not select the GigE connection as the primary connection and use the FastE connection instead. if_lagg with laggproto=failover will do exactly as specified, use bge0 when the link to the switch is good, and fail over to bge1 when bge0 goes down. There is no switch side support required for this configuration.

Tom
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