IPv6 support for inline sampling

Starting with Junos OS Release 12.1, all MX Series routers with Modular Port Concentrators (MPCs) support monitoring and sampling services inline for IPv6 packets. To configure inline sampling for IPv6, include the inline-jflow statement at the [edit forwarding-options sampling instance instance-name family inet6 output] hierarchy level. Inline sampling exclusively supports a new format called IP_FIX that uses UDP as the transport protocol. When one configures inline sampling, include the version-ipfix statement at the [edit forwarding-options sampling instance instance-name family inet6 output flow-server address] hierarchy level. New CLI options have been introduced to improve sampling for both IPv4 and IPv6 by enabling customers to set the size for the IPv4 and IPv6 hash tables based on their requirements. The hash table sizes are configured in units of 256K (256*1024). The range of acceptable values is 1 through 15 units.