[CentOS] ifconfig showing same mac for 2 nics in same bond

aurfalien at gmail.com aurfalien at gmail.com
Tue Oct 6 19:59:29 UTC 2009


Hi all,

I just noticed that my two nics that are bonded via mode 0 are showing  
the same mac addy in ifconfig.

Is this normal?

In syslog I keep getting;
kernel: pbond0: received packet with  own address as source address

Some guidance is appreciated before I dive in and troubleshoot.

If I don't list the mac addy in my ifcfg-th# files, only one of the 2  
nic comes up during boot.


uname;
2.6.18-128.7.1.el5xen

/etc/modprode.conf
alias eth0 tg3
alias eth1 tg3
alias eth2 forcedeth
alias eth3 forcedeth
alias scsi_hostadapter2 mptsas
alias scsi_hostadapter mptspi
alias scsi_hostadapter1 mptfc
alias scsi_hostadapter2 mptsas
alias bond0 bonding
options bond0 miimon=80 mode=0
alias peth0 tg3

/etc/sysconfig/network-scripts/ifcfg-eth0
# Broadcom Corporation NetXtreme BCM5715 Gigabit Ethernet
DEVICE=eth0
BOOTPROTO=none
USERCTL=no
HWADDR=00:23:8B:CE:9C:5C
ONBOOT=yes
MASTER=bond0
SLAVE=yes
TYPE=Ethernet

/etc/sysconfig/network-scripts/ifcfg-eth1
# Broadcom Corporation NetXtreme BCM5715 Gigabit Ethernet
DEVICE=eth1
BOOTPROTO=none
USERCTL=no
HWADDR=00:23:8B:CE:9C:5D
ONBOOT=yes
MASTER=bond0
SLAVE=yes
TYPE=Ethernet

/etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
IPADDR=10.0.70.11
NETMASK=255.255.0.0
NETWORK=10.0.0.0
BROADCAST=10.0.255.255
GATEWAY=10.0.10.1
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
TYPE=Ethernet


ifconfig output;
bond0     Link encap:Ethernet  HWaddr 00:23:8B:CE:9C:5C
           inet addr:10.0.70.11  Bcast:10.0.255.255  Mask:255.255.0.0
           inet6 addr: fe80::223:8bff:fece:9c5c/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:10714 errors:0 dropped:0 overruns:0 frame:0
           TX packets:386 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:1157674 (1.1 MiB)  TX bytes:37307 (36.4 KiB)

eth0      Link encap:Ethernet  HWaddr 00:23:8B:CE:9C:5C
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:5618 errors:0 dropped:0 overruns:0 frame:0
           TX packets:192 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:694966 (678.6 KiB)  TX bytes:20541 (20.0 KiB)
           Interrupt:21

eth1      Link encap:Ethernet  HWaddr 00:23:8B:CE:9C:5C
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:5570 errors:0 dropped:0 overruns:0 frame:0
           TX packets:191 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:685771 (669.6 KiB)  TX bytes:19584 (19.1 KiB)
           Interrupt:22

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:2111 errors:0 dropped:0 overruns:0 frame:0
           TX packets:2111 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:5464730 (5.2 MiB)  TX bytes:5464730 (5.2 MiB)

pbond0    Link encap:Ethernet  HWaddr 00:23:8B:CE:9C:5C
           inet6 addr: fe80::223:8bff:fece:9c5c/64 Scope:Link
           UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
           RX packets:11188 errors:0 dropped:0 overruns:0 frame:0
           TX packets:383 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:1380737 (1.3 MiB)  TX bytes:40125 (39.1 KiB)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
           inet addr:192.168.122.1  Bcast:192.168.122.255  Mask: 
255.255.255.0
           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:0 (0.0 b)  TX bytes:468 (468.0 b)



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