[INS-41112] Specified network interface doesnt maintain connectivity across cluster nodes

INFO: Validating for no private interface provided
INFO: Flag oracle.install.crs.allowSingleNIC=false
SEVERE: [FATAL] [INS-41112] Specified network interface doesnt maintain connectivity across cluster nodes.
   CAUSE: Installer has detected that network interface eth0 does not maintain connectivity on all cluster nodes.
   ACTION: Ensure that the chosen interface has been configured across all cluster nodes.
SEVERE: [FATAL] [INS-41112] Specified network interface doesnt maintain connectivity across cluster nodes.
   CAUSE: Installer has detected that network interface eth1 does not maintain connectivity on all cluster nodes.
   ACTION: Ensure that the chosen interface has been configured across all cluster nodes.
INFO: Advice is ABORT



[oracle@rac1 grid]$ ./runcluvfy.sh comp nodecon -n rac1,rac2 -verbose

Verifying node connectivity

Checking node connectivity...

Checking hosts config file...
  Node Name                             Status
  ------------------------------------  ------------------------
  rac2                                  passed
  rac1                                  passed

Verification of the hosts config file successful


Interface information for node "rac2"
 Name   IP Address      Subnet          Gateway         Def. Gateway    HW Address        MTU
 ------ --------------- --------------- --------------- --------------- ----------------- ------
 eth0   192.168.6.12    192.168.6.0     0.0.0.0         192.168.6.2     00:0C:29:03:F2:84 1500
 eth1   192.168.9.12    192.168.9.0     0.0.0.0         192.168.6.2     00:0C:29:03:F2:8E 1500


Interface information for node "rac1"
 Name   IP Address      Subnet          Gateway         Def. Gateway    HW Address        MTU
 ------ --------------- --------------- --------------- --------------- ----------------- ------
 eth0   192.168.6.11    192.168.6.0     0.0.0.0         192.168.6.2     00:0C:29:8A:36:71 1500
 eth1   192.168.9.11    192.168.9.0     0.0.0.0         192.168.6.2     00:0C:29:8A:36:7B 1500


Check: Node connectivity of subnet "192.168.6.0"
  Source                          Destination                     Connected?
  ------------------------------  ------------------------------  ----------------
  rac2[192.168.6.12]              rac1[192.168.6.11]              yes
Result: Node connectivity passed for subnet "192.168.6.0" with node(s) rac2,rac1


Check: TCP connectivity of subnet "192.168.6.0"
  Source                          Destination                     Connected?
  ------------------------------  ------------------------------  ----------------
  rac1:192.168.6.11               rac2:192.168.6.12               passed
Result: TCP connectivity check passed for subnet "192.168.6.0"


Check: Node connectivity of subnet "192.168.9.0"
  Source                          Destination                     Connected?
  ------------------------------  ------------------------------  ----------------
  rac2[192.168.9.12]              rac1[192.168.9.11]              yes
Result: Node connectivity passed for subnet "192.168.9.0" with node(s) rac2,rac1


Check: TCP connectivity of subnet "192.168.9.0"
  Source                          Destination                     Connected?
  ------------------------------  ------------------------------  ----------------
  rac1:192.168.9.11               rac2:192.168.9.12               passed
Result: TCP connectivity check passed for subnet "192.168.9.0"


Interfaces found on subnet "192.168.6.0" that are likely candidates for VIP are:
rac2 eth0:192.168.6.12
rac1 eth0:192.168.6.11

Interfaces found on subnet "192.168.9.0" that are likely candidates for a private interconnect are:
rac2 eth1:192.168.9.12
rac1 eth1:192.168.9.11
Checking subnet mask consistency...
Subnet mask consistency check passed for subnet "192.168.6.0".
Subnet mask consistency check passed for subnet "192.168.9.0".
Subnet mask consistency check passed.

Result: Node connectivity check passed


Verification of node connectivity was successful.
[oracle@rac1 grid]$

There is no error message for the connectivity check.
Issue disappeared after rebooting both RAC nodes.