Oracle data appliance validate failure on network bond2 does not have salve

Got the following error :

/opt/oracle/oak/bin/oakcli validate -a -f /tmp/validateAll.t 

...

ERROR: Bond interface bond2 has 0 slave interfaces, expected 2 interface
WARNING: Bond interface bond2 has the following current status:down
RESULT: Bond interface bond2 is down configured in mode:fault-tolerance (active-backup) with current active interface as None

...

Not sure what happened. I made some change during a testing to bring up bond2 with IP assign to it. Only /etc/sysconfig/network-scirpts/ifcfg-bond2 got changed with IP/Subnet/Mask information. ifcfg-eth6 and eth7 were not touched and associating with bond2. 

After checking, found the eth6 and eth7 are down. which is the reason I got this error. 

ifconfig -a

...

bond2     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          BROADCAST MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:0 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:0 (0.0 b)  TX bytes:0 (0.0 b)

...

eth6      Link encap:Ethernet  HWaddr A0:36:9F:08:E3:9F
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:25 Memory:df2a0000-df2c0000

eth7      Link encap:Ethernet  HWaddr A0:36:9F:08:E3:9E
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:8512319 errors:0 dropped:0 overruns:0 frame:0
          TX packets:867912785 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1389865582 (1.2 GiB)  TX bytes:388587192156 (361.9 GiB)
          Interrupt:26 Memory:df2e0000-df300000

Bring up eth6 and eth7 

ifdown eth6

ifdown eth7

ifup eth6

ifup eth7

ifconfig -a

...

bond2     Link encap:Ethernet  HWaddr A0:36:9F:08:E3:9F

          BROADCAST MASTER MULTICAST  MTU:1500  Metric:1

          RX packets:8512319 errors:0 dropped:0 overruns:0 frame:0

          TX packets:867912785 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:1389865582 (1.2 GiB)  TX bytes:388587192156 (361.9 GiB)

...

eth6      Link encap:Ethernet  HWaddr A0:36:9F:08:E3:9F

          UP BROADCAST SLAVE MULTICAST  MTU:1500  Metric:1

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

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

          collisions:0 txqueuelen:1000

          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

          Interrupt:25 Memory:df2a0000-df2c0000

eth7      Link encap:Ethernet  HWaddr A0:36:9F:08:E3:9F

          UP BROADCAST SLAVE MULTICAST  MTU:1500  Metric:1

          RX packets:8512319 errors:0 dropped:0 overruns:0 frame:0

          TX packets:867912785 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:1389865582 (1.2 GiB)  TX bytes:388587192156 (361.9 GiB)

          Interrupt:26 Memory:df2e0000-df300000

Validate agin. with oakcli. All good.
...

WARNING: Bond interface bond2 has the following current status:down
RESULT: Bond interface bond2 is down configured in mode:fault-tolerance (active-backup) with current active interface as None
                Slave1 interface is eth6 with status:down Link fail count=0 Maccaddr:a0:36:9f:08:e3:9f
                Slave2 interface is eth7 with status:down Link fail count=0 Maccaddr:a0:36:9f:08:e3:9e

...