hi:

I have bond two NIC, but when one NIC's link down, the another NIC may enter promiscuous mode, and then left promiscuous mode. can someone help me?

the following was the log,come from /var/log/messages:

Oct 19 10:01:20 skysan30426 kernel: pci0000:00: eth0: Link is Down
Oct 19 10:01:20 skysan30426 netplugd[2056]: eth0: state ACTIVE flags 0x00011843 UP,BROADCAST,RUNNING,SLAVE,MULTICAST,10000 -> 0x00001803 UP,BROADCAST,SLAVE,MULTICAST
Oct 19 10:01:20 skysan30426 netplugd[26854]: /etc/netplug.d/netplug eth0 out -> pid 26854
Oct 19 10:01:20 skysan30426 kernel: bonding: bond0: link status definitely down for interface eth0, disabling it
Oct 19 10:01:20 skysan30426 kernel: bonding: bond0: making interface eth1 the new active one.
Oct 19 10:01:20 skysan30426 kernel: device eth1 entered promiscuous mode
Oct 19 10:01:20 skysan30426 kernel: audit(1287453680.735:11): dev=eth1 prom=256 old_prom=0 auid=4294967295 ses=4294967295
Oct 19 10:01:20 skysan30426 netplugd[2056]: eth0: state OUTING pid 26854 exited status 0
Oct 19 10:01:30 skysan30426 kernel: device eth1 left promiscuous mode
Oct 19 10:01:30 skysan30426 kernel: audit(1287453690.726:12): dev=eth1 prom=0 old_prom=256 auid=4294967295 ses=4294967295


----------------------------------------
OS: CentOS 5.2
kernel:2.6.18-92
ARCH：x86－64
bonding mode：6


[root@skysan30426 network-scripts]# cat /etc/modprobe.conf
alias eth0 e1000e
alias eth1 e1000
alias scsi_hostadapter ahci
alias scsi_hostadapter1 usb-storage
alias net-pf-10 off
alias ipv6 off

alias bond0 bonding
options bond0 miimon=100 mode=6

[root@skysan30426 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-bond0
NETMASK=255.255.255.0
BOOTPROTO=static
GATEWAY=10.10.170.100
IPADDR=10.10.170.199
ONBOOT=yes
DEVICE=bond0

[root@skysan30426 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
BOOTPROTO=none
MASTER=bond0
HWADDR=00:15:17:B3:F7:C2
ONBOOT=no
USERCTL=no
DEVICE=eth0
SLAVE=yes

[root@skysan30426 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
BOOTPROTO=none
MASTER=bond0
HWADDR=00:15:17:B3:F7:C0
ONBOOT=no
USERCTL=no
DEVICE=eth1
SLAVE=yes


waiting for reply.....

anyone encounter this problem?

http://www.mail-archive.com/linuxker.../msg00583.html

Looks like according to this that it would be normal behavior for this to happen.

thanks.

your mean that the bonding was setted to promiscuous mode?

thank grim76! After I view the source code "driver/net/bonding/bong/bond_alb.c", I found this behavior is normal.