topic Re: Bonding + Procurve v1810-24G in Operating System - Linux

Bonding + Procurve v1810-24G

JAIF — Thu, 08 Sep 2011 11:13:44 GMT

Hello,

I have an interesting situation configuring a bond between two network cards and a Procurve switch.

I configured bond0 using the algorithm balance-rr ,. which should need the switch configured with trunking in both ports (I got that from the kernel documentation).

What is strange is that when I have the trunking disabled, everything works fine, and the load is balanced between both ports. But when I activate trunking ( dynamic or static, without LACP ) I lose the connection.

¿Does anyone know why this happens?

For now, I´m just using balance-rr with trunking disabled, but I would like to know why it is working :)

Best regards.

Re: Bonding + Procurve v1810-24G

Modris Bremze — Fri, 09 Sep 2011 08:34:43 GMT

Please take a look at http://www.linuxfoundation.org/....

Also, balance-alb (mode=6, adaptive load balancing) is similar mode, which does not require additional switch configuration.

Re: Bonding + Procurve v1810-24G

JAIF — Mon, 12 Sep 2011 12:38:23 GMT

Thank you very much for your answer :)

I´ve had read already that information ( it is the same that is provided on the documentation directory of the kernel sources ).

I copy and paste an excerpt (actually from google cache because the site was cracked):

The balance-rr, balance-xor and broadcast modes generally
require that the switch have the appropriate ports grouped together.
The nomenclature for such a group differs between switches, it may be
called an "etherchannel" (as in the Cisco example, above), a "trunk
group" or some other similar variation. For these modes, each switch
will also have its own configuration options for the switch's transmit
policy to the bond. Typical choices include XOR of either the MAC or
IP addresses. The transmit policy of the two peers does not need to
match. For these three modes, the bonding mode really selects a
transmit policy for an EtherChannel group; all three will interoperate
with another EtherChannel group.

I am aiming for balance-rr to be able to increase the bandwith between two single hosts.

The configuration is working properly, but without defining the trunk in the switch. I see now that they write "generally
require", so perhaps they are aware of some special cases.

Best regards