Interface

MTU of eth2 and eth3 was changed to 9000 in order for the Router0 to form full neighborship adjacency with Core switches for OSPFv3. (Core switches are also enabled for Jumbo frame)

(OSPFv3 is very sensitive to MTU)

System

 conntrack expect-table-size, hash-size and table-size have changed from default value.

table-size always has to be power of 2 (2^20) and hash-size=tables-size/8.

Changing hash-size needs a reboot in order to take place.