Hi all,
we are testing CentOS 7 in order to migrate from Scientific Linux 6 / CentOS 6 and we are facing an issue with the network. Trying to configure network with teaming in activebackup mode or also with bonding in mode=1 (active backup as well) we see many RX dropped packets in the bond0 interface (around 10% of the total), 100% RX drops in the backup interface and 0% in the active interface. Current kernel is 3.10.0-229.7.2.el7.x86_64, and I tried with included ixgbe driver (4.0.1) and with by compiling the newest version (ixgbe-4.1.1-1.x86_64), results are the same. We use tagged VLANs, but switch has configured a correct VLAN, a we saw no problems when this machine was running Scientific Linux 6 (CentOS 6-like system).
Any ideas?
[root@dc106 ~]# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Bonding Mode: fault-tolerance (active-backup) Primary Slave: enp6s0 (primary_reselect always) Currently Active Slave: enp6s0 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 600000 Down Delay (ms): 0
Slave Interface: enp6s0 MII Status: up Speed: 10000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:1b:21:91:aa:c5 Slave queue ID: 0
Slave Interface: enp7s0f0 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:25:90:1a:2d:aa Slave queue ID: 0
[root@dc106 ~]# cat /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 IPADDR=193.109.172.106 NETMASK=255.255.255.128 USERCTL=no BOOTPROTO=none ONBOOT=yes MTU=9000 IPV6ADDR=2001:67c:1148:200::106 TYPE=Bond BONDING_MASTER=yes NM_CONTROLLED=no BONDING_OPTS="options bonding mode=1 primary=enp6s0 miimon=100 updelay=600000"
[root@dc106 ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp7s0f0 # Network slave interface DEVICE=enp7s0f0 USERCTL=no ONBOOT=yes MASTER=bond0 SLAVE=yes BOOTPROTO=none HWADDR=00:25:90:1A:2D:AA NM_CONTROLLED=no
[root@dc106 ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp6s0 # Network slave interface DEVICE=enp6s0 USERCTL=no ONBOOT=yes MASTER=bond0 SLAVE=yes BOOTPROTO=none HWADDR=00:1B:21:91:AA:C5 NM_CONTROLLED=no
[root@dc106 ~]# ifconfig enp6s0 enp6s0: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 9000 ether 00:1b:21:91:aa:c5 txqueuelen 50000 (Ethernet) RX packets 19815269 bytes 1317959345 (1.2 GiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 126023402 bytes 1134827686804 (1.0 TiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@dc106 ~]# ifconfig enp7s0f0 enp7s0f0: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 9000 ether 00:1b:21:91:aa:c5 txqueuelen 50000 (Ethernet) RX packets 29436 bytes 1768642 (1.6 MiB) RX errors 0 dropped 29436 overruns 0 frame 0 TX packets 10 bytes 1275 (1.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device memory 0xfafe0000-faffffff
[root@dc106 ~]# ifconfig bond0 bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 9000 inet 193.109.172.106 netmask 255.255.255.128 broadcast 193.109.172.127 ether 00:1b:21:91:aa:c5 txqueuelen 50000 (Ethernet) RX packets 19844789 bytes 1319735635 (1.2 GiB) RX errors 0 dropped 1960770 overruns 0 frame 0 TX packets 126023464 bytes 1134827699315 (1.0 TiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Thanks a lot,