All things related to multicast

[Chuck Anderson <>]

On Wed, May 17, 2006 at 12:25:33PM -0400, Bill Owens wrote:
> Thanks for the ID - that makes sense given the hostnames. I guess we 
> have another braindead vendor to add to our hall of shame. Have 
> these people never heard of:
> 
>  - IANA?
>  - admin scoped groups?
> 
> Hmm, and they seem to join the group as well. So anyone with one of 
> these pieces of junk probably ought to either disable multicast on 
> the subnet where they're located, or filter that group at the edge.

Shouldn't the backbone networks be defining RPs only for groups that 
IANA has assigned, and not the RESERVED and UNASSIGNED blocks?

   224.0.0.0   - 224.0.0.255     (224.0.0/24)  Local Network Control Block
   224.0.1.0   - 224.0.1.255     (224.0.1/24)  Internetwork Control Block
   224.0.2.0   - 224.0.255.0                   AD-HOC Block
   224.1.0.0   - 224.1.255.255   (224.1/16)    ST Multicast Groups
   224.2.0.0   - 224.2.255.255   (224.2/16)    SDP/SAP Block
   224.252.0.0 - 224.255.255.255               DIS Transient Block
   225.0.0.0   - 231.255.255.255               RESERVED
   232.0.0.0   - 232.255.255.255 (232/8)       Source Specific Multicast
                                               Block
   233.0.0.0   - 233.255.255.255 (233/8)       GLOP Block
   234.0.0.0   - 238.255.255.255               RESERVED
   239.0.0.0   - 239.255.255.255 (239/8)       Administratively Scoped
                                               Block

> show pim rps
Instance: PIM.master
Address family INET
RP address      Type        Holdtime Timeout Active groups Group prefixes
w.x.y.z        static             0    None             2  224.0.1.0/24
                                                           224.0.2.0/23
                                                           224.0.4.0/22
                                                           224.0.8.0/21
                                                           224.0.16.0/20
                                                           224.0.32.0/19
                                                           224.0.64.0/18
                                                           224.0.128.0/17
                                                           224.2.0.0/16
                                                           233.0.0.0/8