User manual

C HAPTER 17 | Multicast Filtering
Layer 2 IGMP (Snooping and Query)
– 284 –
ES-2000 Series
To show the all interfaces statically or dynamically assigned to a multicast
service:
1. Click Multicast, IGMP Snooping, IGMP Member.
2. Select Show Current Member from the Action list.
3. Select the VLAN for which to display this information.
Figure 179: Showing Current Interfaces Assigned to a Multicast Service
SETTING IGMP
SNOOPING STATUS
PER INTERFACE
Use the Multicast > IGMP Snooping > Interface (Configure) page to
configure IGMP snooping attributes for a VLAN interface. To configure
snooping globally, refer to "Configuring IGMP Snooping and Query
Parameters" on page 277.
COMMAND USAGE
Multicast Router Discovery
There have been many mechanisms used in the past to identify multicast
routers. This has lead to interoperability issues between multicast routers
and snooping switches from different vendors. In response to this problem,
the Multicast Router Discovery (MRD) protocol has been developed for use
by IGMP snooping and multicast routing devices. MRD is used to discover
which interfaces are attached to multicast routers, allowing IGMP-enabled
devices to determine where to send multicast source and group
membership messages. (MRD is specified in draft-ietf-magma-mrdisc-07.)
Multicast source data and group membership reports must be received by
all multicast routers on a segment. Using the group membership protocol
query messages to discover multicast routers is insufficient due to query
suppression. MRD therefore provides a standardized way to identify
multicast routers without relying on any particular multicast routing
protocol.
N OTE : The default values recommended in the MRD draft are implemented
in the switch.