ENVIRONMENT
OS = RHEL 7.4
HA NODES = 2 virtual machines
PRODUCT = CoroSync/Pacemaker
RING CONFIGURED = 2

ISSUE
Resource Group is able to failover when I reboot active node. However when I down Ethernet(ifconfig eth0 down OR ifdown eth0), then the resource group is unable to failover to standby node and seems only PUBLIC-VIP resource stopped.

pcs resource

Resource Group: SERVICEGROUP-XXXX
VOLUMEGROUP (ocf::heartbeat:LVM): Started COM1-XXXXX
FILESYSTEM (ocf::heartbeat:Filesystem): Started COM1-XXXXX
VIP (ocf::heartbeat:IPaddr2): Started COM1-XXXXX
REDIS (ocf::heartbeat:redis): Started COM1-XXXXX
XXXX (ocf::heartbeat: xxx): Started COM1-XXXXX
PUBLIC-VIP (ocf::heartbeat:IPaddr2): Started COM1-XXXXX