I have nic bonding (mode=802.3ad) setup on 2 servers, both running Centos 5.5

In the “Active Aggregator Info”, on one reports 4 ports – which is correct - but the other only reports 3 ports.

It’s always eth0 that shows a different aggregator ID. Changing the cables around so it hits a different port on the switch makes no difference. The switch is correctly configured for the port channel.

The only difference between the 2 servers is one is running Xen (kernel-xen-2.6.18-194.32.1.el5.centos.plus) so I have a few virtual interfaces and bridges.

 

Any ideas what might be happening?

 

Thanx,

 

Russell Smithies

 

 

[root@invmhp01 ~]# cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.4.0 (October 7, 2008)

 

Bonding Mode: IEEE 802.3ad Dynamic link aggregation

Transmit Hash Policy: layer2 (0)

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

 

802.3ad info

LACP rate: slow

Active Aggregator Info:

        Aggregator ID: 19

        Number of ports: 3 <<<<<<<<

        Actor Key: 17

        Partner Key: 5

        Partner Mac Address: 00:1b:90:3d:90:c0

 

Slave Interface: eth0

MII Status: up

Link Failure Count: 0

Permanent HW addr: 1c:c1:de:74:97:5c

Aggregator ID: 18

 

Slave Interface: eth1

MII Status: up

Link Failure Count: 0

Permanent HW addr: 1c:c1:de:74:97:5d

Aggregator ID: 19

 

Slave Interface: eth2

MII Status: up

Link Failure Count: 0

Permanent HW addr: 1c:c1:de:74:97:5e

Aggregator ID: 19

 

Slave Interface: eth3

MII Status: up

Link Failure Count: 0

Permanent HW addr: 1c:c1:de:74:97:5f

Aggregator ID: 19

 

[root@invmhp01 ~]# ifconfig

bond0     Link encap:Ethernet  HWaddr 1C:C1:DE:74:97:5C

          inet addr:147.158.130.183  Bcast:147.158.131.255  Mask:255.255.252.0

          inet6 addr: fe80::1ec1:deff:fe74:975c/64 Scope:Link

          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1

          RX packets:64087 errors:0 dropped:0 overruns:0 frame:0

          TX packets:18179 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:8293500 (7.9 MiB)  TX bytes:31362799 (29.9 MiB)

 

eth0      Link encap:Ethernet  HWaddr 1C:C1:DE:74:97:5C

          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:5770 errors:0 dropped:0 overruns:0 frame:0

          TX packets:21 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:410102 (400.4 KiB)  TX bytes:2524 (2.4 KiB)

 

eth1      Link encap:Ethernet  HWaddr 1C:C1:DE:74:97:5C

          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:22247 errors:0 dropped:0 overruns:0 frame:0

          TX packets:17436 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:1424685 (1.3 MiB)  TX bytes:31161969 (29.7 MiB)

          Interrupt:239

 

eth2      Link encap:Ethernet  HWaddr 1C:C1:DE:74:97:5C

          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:6223 errors:0 dropped:0 overruns:0 frame:0

          TX packets:189 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:442326 (431.9 KiB)  TX bytes:19993 (19.5 KiB)

          Interrupt:235

 

eth3      Link encap:Ethernet  HWaddr 1C:C1:DE:74:97:5C

          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:29852 errors:0 dropped:0 overruns:0 frame:0

          TX packets:537 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:6016657 (5.7 MiB)  TX bytes:179281 (175.0 KiB)

          Interrupt:231

 

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:26818 errors:0 dropped:0 overruns:0 frame:0

          TX packets:26818 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:38558929 (36.7 MiB)  TX bytes:38558929 (36.7 MiB)

 

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:41498 errors:0 dropped:0 overruns:0 frame:0

          TX packets:251 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:3000012 (2.8 MiB)  TX bytes:59877 (58.4 KiB)

          Interrupt:243

 

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:127 errors:0 dropped:0 overruns:0 frame:0

          TX packets:39354 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:15520 (15.1 KiB)  TX bytes:2817598 (2.6 MiB)

 

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:42 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 b)  TX bytes:8160 (7.9 KiB)

 

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF

          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

          RX packets:38746 errors:0 dropped:0 overruns:0 frame:0

          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:2217067 (2.1 MiB)  TX bytes:0 (0.0 b)