To know the configuraton kernel from IPv6 , and what do his difference with kernel configuraton IPv4, we can do it by accessing filesystem /proc , where all values setting of system walk to be noted at this filesystem. Before we see filesystem, there is two clauses to be fulfilled that is :
-Filesystem proc must be compile in kernel linux
-Filesystem proc must be mount before

To check it we can use the command as follows

# mount | grep "type proc"
none on /proc type proc (rw)

Besides the upper command, to see and alter the value setting kernel IPv6 at proc filesystem, we can use the comand “ sysctl”. For example if we want to see the value setting forwarding used the command as follows :

# sysctl –w net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.all.forwarding = 1

# sysctl net.ipv6.conf.all.forwarding
net.ipv6.conf.all.forwarding = 0

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