[CentOS] 4.5 ALB Bonding Hang on Shutdown

Ross S. W. Walker rwalker at medallion.com
Fri Jun 1 17:23:33 UTC 2007

> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Florin Andrei
> Sent: Friday, June 01, 2007 1:06 PM
> To: CentOS mailing list
> Subject: Re: [CentOS] 4.5 ALB Bonding Hang on Shutdown
> Ross S. W. Walker wrote:
> > Since I upgraded from 4.4 to 4.5 my system which has 2 sets
> > of ALB bonded interfaces hangs on shutdown while doing an
> > ifdown on these interfaces.
> What's "ALB"?
> (I'm using bonding and I plan to upgrade from 4.4 to 4.5)

ALB is adaptive load balancing. All interfaces participating in
the bond share a common MAC address that is ARP'd among them.

This way the server sets the load policy and no support on the
switch is necessary.

Standard 802.3ad bonding needs switch support and it works on
a per-path basis, interface per-client, as opposed to a per-packet
basis, interface per packet.

It requires a simplier network infrastructure and I believe gives
better performance.


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