Which release version of Solaris 10 have "snoop -I" feature

In one of Sun docs I found that a new option, -I, is added to the snoop command.This option specifies for the command to use the new IP layer devices instead of the underlying link-layer device to display traffic data. it is used to enhance IP observability.
But in Solaris 10 with release verstion 5.10 dont have this "-I" option.
Please let me know which release version of Solaris 10 support this new option.