Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - MULTICAST ROUTING CONFIGURATION GUIDE 2010-10-07 Configuration Manual page 186

JunosE 11.3.x Multicast Routing Configuration Guide
Blocking and Limiting Multicast Traffic
Blocking Mroutes
ipv6 block-multicast-sources
Limiting Interface Admission Bandwidth
164
MLD Statistics
Use the show ipv6 mld interface command to display statistics, including hardware
multicast packet replication status, for an IPv6 interface stacked over port 8. For more
information, see "Monitoring MLD" on page 194 in "Configuring Multicast Listener Discovery"
on page 179.
You can either block mroute creation, limit the multicast bandwidth admitted on an
outgoing interface, or limit outgoing interface creation on a port.
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.
Use to prevent mroute creation by blocking multicast traffic that has a scope larger
than link-local (for example, global).
Example
host1(config)#ipv6 block-multicast-sources
Use the no version to restore the default behavior of creating mroutes on receiving
multicast packets.
See ipv6 block-multicast-sources.
Interface-level multicast admission control is performed when an OIF on the interface
is added to the mroute for a given (S,G) multicast data stream and the multicast
bandwidth map contains a set admission-bandwidth action for that (S,G).
When enabled, the admission-bandwidth for a particular (S,G) is read from the multicast
bandwidth map and recorded in the mroute when the (S,G) mroute is created. When an
IOF is subsequently added to the mroute, the OIF is blocked from forwarding data if the
additional bandwidth contributed by the (S,G) would exceed the admission-bandwidth
limit for the interface.
Copyright © 2010, Juniper Networks, Inc.