a common notation to specify the scope zone, an implementation SHOULD
support the following format:
            <address>%<zone_id>
 where
      <address> is a literal IPv6 address,
      <zone_id> is a string identifying the zone of the address, and
      `%' is a delimiter character to distinguish between <address> and
      <zone_id>.

fe80::1234%1
ff02::5678%5
ff08::9abc%10
fe80::1234%ne0
ff02::5678%pvc1.3
ff08::9abc%interface10