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Table 17. IGMP snooping querier VLAN status
Field Description
VLAN ID Specifies the VLAN ID on which the IGMP
Snooping Querier is
administratively enabled and for which VLAN exists in the VLAN
database.
Operational State Specifies the operation
al state of the IGMP Snooping Querier on a
VLAN:
• Qu
erier: The snooping switch is the querier in the VLAN. The
snooping switch will send out periodic queries with a time interval
equal to the configured querier query interval. If the snooping
switch sees a better querier (numerically lower) in the VLAN, it
moves to non-querier mode.
• Non-Quer
ier: 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.
• Disab
led. 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, when the querier address
is not configured, or the network management address is not
configured.
Operational Version Displays the IGMP protocol version
of the operational querier.
Last Querier Address Displays the IP address of the last querier from which a query was
snooped on the VLAN.
Last Querier Version Displays the IGMP protocol version of the last querier from which a
qu
ery was snooped on the VLAN.
Operational Max Response
Time
Displays the maximum response time to be used in the queries that are
sent by the snooping querier.
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XS712T Smart Switch
The following table describes the information available on the Querier VLAN Status screen.
MLD Snooping
MLD is a protocol used by IPv6 multicast routers to discover the presence of multicast
listeners (nodes wishing to receive IPv6 multicast packets) on its directly attached links and
to discover which multicast packets are of interest to neighboring nodes. MLD 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.
The switch can snoop on both MLDv1 and MLDv2 protocol packets and bridge IPv6 multicast
dat
a based on destination IPv6 Multicast MAC Addresses. The switch can be configured to
perform MLD Snooping and IGMP Snooping simultaneously.