Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - MULTICAST ROUTING CONFIGURATION GUIDE 2010-10-07 Configuration Manual page 214

JunosE 11.3.x Multicast Routing Configuration Guide
ipv6 mld static-exclude
ipv6 mld static-include
Configuring Explicit Host Tracking
192
Use to statically exclude the MLD (S,G) membership for a host that is not capable of
dynamically signaling group membership.
Example
host1:boston(config-if)#ipv6 mld static-exclude 2001::1 ff0e::1
Use the no version to remove the static designation.
See ipv6 mld static-exclude.
Use to statically include the MLD (S,G) membership for a host that is not capable of
dynamically signaling group membership.
Example
host1:boston(config-if)#ipv6 mld static-include 2001::1 ff0e::1
Use the no version to remove the static designation.
See ipv6 mld static-include.
Explicit host tracking enables the router to explicitly track each individual host that is
joined to a group or channel on a particular multi-access network.
Explicit host tracking provides the following benefits:
Minimal leave latency when a host leaves a multicast group or channel. When the
router receives a leave message for a group or channel on an interface, it accesses a
list of hosts and immediately stops forwarding traffic if the sender is the last host to
request traffic for that group or channel. The leave latency is bound only by the packet
transmission latencies in the multi-access network and the processing time in the
router.
Ability to change channels quickly in networks where bandwidth is constrained between
a multicast-enabled router and hosts.
Ability to determine what multicast hosts are joined to particular multicast groups or
channels; this is useful for accounting purposes.
Reduction of control message traffic on the network because, when it receives a leave
message, the router no longer needs to send out MLD queries to verify membership.
As a result, interested hosts also do not need to respond to these queries with reports.
Tracking based on MLD reports for hosts in both include and exclude modes for every
multicast group or channel on an interface.
When the router is configured for explicit host tracking and starts performing immediate
leave using the host information collected, every leave message received for a group or
channel is treated as follows:
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