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8-Port Gigabit (PoE+) Ethernet Smart Managed Pro Switch with (2 SFP or 2 Copper Ports and)
Cloud Management
Configure Switching User Manual214
The following table describes the nonconfigurable information displayed on the page.
Table 45. Querier VLAN Status information
Field Description
VLAN ID The VLAN ID on which IGMP snooping querier is administratively enabled and the
VLAN exists in the VLAN database.
Operational State The
operational state of the IGMP snooping querier on a VLAN. It can be
in any of
the following states:
Querier.
The snooping
switch is the querier in the VLAN. The snooping switch
sends out periodic queries with a time interval equal to the configured querier
query interval. If the snooping switch finds a better querier in the VLAN, it
moves to non-querier mode.
Non-Querier. The snooping switch
is in non-querier mode in the VLAN. If the
querier expiry interval timer expires, the snooping switch moves into querier
mode.
Disabled.
The snooping
querier is not operational on the VLAN. The snooping
querier moves to disabled mode when IGMP snooping is not operational on
the VLAN or when the querier address is not configured or the network
management address is also not configured.
Operational Version The operational IGMP protocol version of the querier.
Last Querier Address The IP address of the last querier from which a query was snooped on the VLAN.
Last Querier Version The IGMP protocol version of the last querier from which a query
was snooped
on
the VLAN.
Operational Max Response
Time
The maximum response time to be used in the queries that are sent by the
snooping querier
.
Manage MLD snooping
In IPv6 networks, Multicast Listener Discovery (MLD) snooping performs a similar function as
IGMP does in IPv4 networks. With MLD snooping, IPv6 multicast data is selectively
forwarded to ports that are configured to receive the data, instead of being flooded to all ports
in a VLAN. The ports are determined by snooping IPv6 multicast control packets.
A multicast listener is a device that is configured to receive IPv6 multicast packets. MLD is
used by IPv6 multicast routers to discover the presence of multicast listeners on its
directly-attached links and to discover which multicast packets are of interest to neighboring
devices.
The MLD protocol is derived from IGMP. MLD version 1 (MLDv1) is equivalent to IGMPv2,
and MLD version 2 (MLDv2) is equivalent to IGMPv3. MLD is a subprotocol of Internet
Control Message Protocol version 6 (ICMPv6), and MLD messages are a subset of ICMPv6
messages, identified in IPv6 packets by a preceding Next Header value of 58.