flag multicast-only

Mode: Configuration Mode

Description:

The multicast-only flag indicates that only addresses within the multicast address range should be allowed.

Flag multicast-only is a type modifier that restricting values to be within the IPv4 or IPv6 multicast ip address ranges.

IPv4 multicast address range (RFC 2780)

224.0.0.0 - 239.255.255.255

IPv6 multicast address range (RFC 4291)

FF00::0 - FF0F:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF

This flag can be used on all IPv4 and IPv6 address types.

Example 1:

        object newbie {
            help "Newbie settings";

            attribute mcast-addr {
                help "Test mcast address";
                flag multicast-only;
                type ipv4addr;
            }
        }

Display 1:

        user@router# set example newbie mcast-addr ?
        Possible completions:
          <mcast-addr>         Test mcast address
        [edit]
        user@router# set example newbie mcast-addr 1.1.1.1   
                                                   ^
        invalid multicast address - '1.1.1.1' at '1.1.1.1'
        user@router# set example newbie mcast-addr 222.1.1.1 
                                                   ^
        invalid multicast address - '222.1.1.1' at '222.1.1.1'
        user@router# set example newbie mcast-addr 224.0.1.2          

        [edit]
        user@router# show example 
        newbie {
            mcast-addr 224.0.1.2;
        }

        [edit]

Example 2:

        object newbie {
            help "Newbie settings";

            attribute src-addr {
                help "Test multicast constraint";
                flag multicast-only;
                type ipv6prefix;
            }
        }

Display 2:

        user@router# set example newbie ?
        Possible completions:
          <[Enter]>            Execute this command
          src-addr             Test multicast constraint
          |                    Pipe through a command
        [edit]
        user@router# set example newbie src-addr 1234:1::2/126  
                                                 ^
        invalid multicast address - '1234:1::2/126' at '1234:1::2/126'

        [edit]
        user@router# set example newbie src-addr FF05::3/120 

        [edit]
        user@router# show example
        newbie {
            src-addr FF05::3/120;
        }

Topics for further reading:

See also:

Reference (to programmers guide/style guide):

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