CentOS not recognise multicast traffic ?

To correct this we need to change kernel variables.


echo 2 > /proc/sys/net/ipv4/conf/eth0/rp_filter
echo 2 > /proc/sys/net/ipv4/conf/eth1/rp_filter
echo 2 > /proc/sys/net/ipv4/conf/eth2/rp_filter

of modify /etc/sysctl.conf

# Controls source route verification (previously 1)
net.ipv4.conf.default.rp_filter = 2