ECS4110-52T_Management Guide

C HAPTER 15 | Multicast Filtering
MLD Snooping (Snooping and Query for IPv6)
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PARAMETERS
These parameters are displayed:
◆ MLD Snooping Status – When enabled, the switch will monitor
network traffic to determine which hosts want to receive multicast
traffic. (Default: Disabled)
◆ Querier Status – When enabled, the switch can serve as the querier
for MLDv2 snooping if elected. The querier is responsible for asking
hosts if they want to receive multicast traffic. (Default: Disabled)
An IPv6 address must be configured on the VLAN interface from which
the querier will act if elected. When serving as the querier, the switch
uses this IPv6 address as the query source address.
The querier will not start or will disable itself after having started if it
detects an IPv6 multicast router on the network.
◆ Robustness – MLD Snooping robustness variable. A port will be
removed from the receiver list for a multicast service when no MLD
reports are detected in response to a number of MLD queries. The
robustness variable sets the number of queries on ports for which there
is no report. (Range: 2-10 Default: 2)
◆ Query Interval – The interval between sending MLD general queries.
(Range: 60-125 seconds; Default: 125 seconds)
This attribute applies when the switch is serving as the querier.
An MLD general query message is sent by the switch at the interval
specified by this attribute. When this message is received by
downstream hosts, all receivers build an MLD report for the multicast
groups they have joined.
◆ Query Max Response Time – The maximum response time
advertised in MLD general queries. (Range: 5-25 seconds;
Default: 10 seconds)
This attribute controls how long the host has to respond to an MLD
Query message before the switch deletes the group if it is the last
member.
◆ Router Port Expiry Time – The time the switch waits after the
previous querier stops before it considers the router port (i.e., the
interface that had been receiving query packets) to have expired.
(Range: 300-500 seconds; Default: 300 seconds)
◆ MLD Snooping Version – The protocol version used for compatibility
with other devices on the network. This is the MLD version the switch
uses to send snooping reports. (Range: 1-2; Default: 2)
◆ Unknown Multicast Mode – The action for dealing with unknown
multicast packets. Options include:
■
Flood – Floods any received IPv6 multicast packets that have not
been requested by a host to all ports in the VLAN.