Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Blocking IPv6 Mroutes

    By default, when an interface receives multicast traffic, even when the scope of that traffic exceeds link-local, the virtual router creates an mroute. You can use the ipv6 block-multicast-sources command to block all multicast traffic with a scope larger than link-local (for example, global) and prevent mroute creation under these conditions.

    Note: Issuing this command does not affect reception of link-local multicast packets.

    To block all multicast traffic with a scope larger than link-local:

    • Issue the ipv6 block-multicast-sources command in Global Configuration mode.
      host1(config)#ipv6 block-multicast-sources

    Use the no version to restore the default behavior of creating mroutes on receiving multicast packets.

    Published: 2014-08-20