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Message-Id: <20120329.181220.1671496234086192108.davem@davemloft.net> Date: Thu, 29 Mar 2012 18:12:20 -0400 (EDT) From: David Miller <davem@...emloft.net> To: fubar@...ibm.com Cc: wpan@...hat.com, netdev@...r.kernel.org, andy@...yhouse.net, lwang@...hat.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH net] bonding: emit event when bonding changes MAC From: Jay Vosburgh <fubar@...ibm.com> Date: Thu, 29 Mar 2012 10:19:44 -0700 > Weiping Pan <wpan@...hat.com> wrote: > >>When a bonding device is configured with fail_over_mac=active, >>we expect to see the MAC address of the new active slave as the source MAC >>address after failover. But we see that the source MAC address is the MAC >>address of previous active slave. >> >>Emit NETDEV_CHANGEADDR event when bonding changes its MAC address, in order >>to let arp_netdev_event flush neighbour cache and route cache. >> >>How to reproduce this bug ? >> >> -----------hostB---------------- >>hostA ----- switch ---|-- eth0--bond0(192.168.100.2/24)| >>(192.168.100.1/24 \--|-- eth1-/ | >> -------------------------------- >> >>1 on hostB, >>modprobe bonding mode=1 miimon=500 fail_over_mac=active downdelay=1000 >>num_grat_arp=1 >>ifconfig bond0 192.168.100.2/24 up >>ifenslave bond0 eth0 >>ifenslave bond0 eth1 >> >>then eth0 is the active slave, and MAC of bond0 is MAC of eth0. >> >>2 on hostA, ping 192.168.100.2 >> >>3 on hostB, >>tcpdump -i bond0 -p icmp -XXX >>you will see bond0 uses MAC of eth0 as source MAC in icmp reply. >> >>4 on hostB, >>ifconfig eth0 down >>tcpdump -i bond0 -p icmp -XXX (just keep it running in step 3) >>you will see first bond0 uses MAC of eth1 as source MAC in icmp >>reply, then it will use MAC of eth0 as source MAC. >> >>Signed-off-by: Weiping Pan <wpan@...hat.com> > > Signed-off-by: Jay Vosburgh <fubar@...ibm.com> Applied, thanks everyone. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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