The following are examples of invalid extended communities:
- rt:10.45.87.0:600: Invalid because the IP address is NOT a valid
host IP address
- rt:239.1.1.1:400: Invalid because IP address belongs to
class-D
- rt:100.200.300.400:200: Invalid because the IP address is
invalid
- soo:12345678:500: Invalid because the AS number 12345678 is out of
the 2-byte AS number range, 1 to 65535
