link aggregation - bundling 2 lagg interfaces together

[Damien Fleuriot]

On 2/4/11 4:55 PM, Freddie Cash wrote:
> On Fri, Feb 4, 2011 at 4:13 AM, Damien Fleuriot <ml at my.gd> wrote:
>> I have a firewall with 2x Intel pro dual port cards.
>>
>> On Intel A , port 1 goes to switch 1, port 2 goes to switch 2
>> On Intel B , port 1 goes to switch 1, port 2 goes to switch 2
>>
>> I have created the following 2 lagg devices using LACP:
>>
>> lagg0 = A1 + B1
>> lagg1 = A2 + B2
>>
>> This works fine.
>>
>> Now, what I had in mind was creating a lagg2 device using lagg0 and
>> lagg1 with failover.
>>
>> That would provide redundancy in case of a switch failure.
> 
> Couple different options:
>   - create a single lagg0 device using all port NIC ports
>   - create your lagg0 using A1 + B2, and your lagg1 using A2+B1
> 
> Both of those will give you fail-over support for losing a single NIC
> port, an entire NIC, or an entire switch.
> 
> Of course, if your switched aren't stacked to support LACP across
> them, then you will be limited to a single links bandwidth.  But you
> will be extremely safe.  :)


Well, if I create lagg0 A1 + B2 and lagg1 A2+B1 , I'll end up with 2 laggs.

How though, to I bind my vlan interfaces to *both* laggs ?

I'm not sure that can be done.

Currently and in the interim, I've put our WAN vlan on lagg0 and our 2
internal vlans on lagg1 ;)