"show ip/ipv6 route <prefix> [json]" uses a different parser chain from
"show ip/ipv6 route [json]".
"show ip/ipv6 route <prefix> [json]" CLI does not support "fib" option.
Fix:
Add "fib" option to the above command.
The new command is: "show ip/ipv6 <route/fib> <prefix> [json]"
If "fib" option is specified, we will show only the selected routes
(Similar to "show ip/ipv6 fib")