Here is my bonding configuration - modprobe bonding mode=balance-alb miimon=100 ifconfig bond0 192.168.30.3 netmask 255.255.255.0 up ifenslave bond0 p255p1 ifenslave bond0 p255p2 cat /proc/net/bonding/bond0 bond0 has two interfaces p255p1 (bb:36) and p255p2 (bb:37) I see tons of same src-mac (slave), dst-mac (same slave) packets, length of 0x60 with NULL payload on each interfaces - coming up to the switch. This doesn't look normal. Has anyone seen anything like this before? Any pointers will be appreciated. Thank you Nitin Drivers : igb: Intel(R) Gigabit Ethernet Network Driver - version 4.1.2-k Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) [root@localhost ~]# tcpdump -nXXvvvv -i p255p1 tcpdump: listening on p255p1, link-type EN10MB (Ethernet), capture size 65535 bytes 17:01:45.058184 00:25:90:c0:bb:36 > 00:25:90:c0:bb:36 Null Information, send seq 0, rcv seq 0, Flags [Command], length 46 0x0000: 0025 90c0 bb36 0025 90c0 bb36 0060 0000 .%...6.%...6.`.. 0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0030: 0000 0000 0000 0000 0000 0000 ............ 17:01:45.058198 00:25:90:c0:bb:36 > 00:25:90:c0:bb:36 Null Information, send seq 0, rcv seq 0, Flags [Command], length 46 0x0000: 0025 90c0 bb36 0025 90c0 bb36 0060 0000 .%...6.%...6.`.. 0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0030: 0000 0000 0000 0000 0000 0000 ............ 17:01:45.058200 00:25:90:c0:bb:36 > 00:25:90:c0:bb:36 Null Information, send seq 0, rcv seq 0, Flags [Command], length 46 0x0000: 0025 90c0 bb36 0025 90c0 bb36 0060 0000 .%...6.%...6.`.. 0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0030: 0000 0000 0000 0000 0000 0000 ............