[ale] Bonding and balance-alb mode

Jim Kinney jim.kinney at gmail.com
Wed Sep 30 13:15:14 EDT 2015


For incoming balance doesn't there have to be a shared MAC between the
multiple interfaces? Otherwise, the upstream routers will send to the
first connected interface.
On Wed, 2015-09-30 at 12:44 -0400, James Sumners wrote:
> I have a system with two NICs bonded together and the bonding mode is
> set to balance-alb. From my understanding of the documentation, this
> mode should balance incoming traffic as well as outgoing; maybe not
> 1:1 on the incoming, but fairly close. That's not what I'm seeing. I
> see traffic coming in on one interface and leaving on both.
> 
> Has anyone seen this before? Or have any ideas on what could be going
> on?
> 
> ```
> # cat /proc/net/bonding/bond0
> Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
> 
> Bonding Mode: adaptive load balancing
> Primary Slave: None
> Currently Active Slave: em2
> MII Status: up
> MII Polling Interval (ms): 100
> Up Delay (ms): 0
> Down Delay (ms): 0
> 
> Slave Interface: em1
> MII Status: up
> Speed: 1000 Mbps
> Duplex: full
> Link Failure Count: 0
> Permanent HW addr: <redacted>
> Slave queue ID: 0
> 
> Slave Interface: em2
> MII Status: up
> Speed: 1000 Mbps
> Duplex: full
> Link Failure Count: 0
> Permanent HW addr: <redacted>
> Slave queue ID: 0
> ```
> 
> -- 
> James Sumners
> http://james.sumners.info/ (technical profile)
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-- 
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain

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