XS712T Smart Switch
The following table describes the information available on the Querier VLAN Status screen.
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 operational state of the IGMP Snooping Querier on a |
| VLAN: |
| • Querier: 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 |
| • |
| 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, 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 |
| query was snooped on the VLAN. |
|
|
Operational Max Response | Displays the maximum response time to be used in the queries that are |
Time | sent by the snooping querier. |
|
|
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 data based on destination IPv6 Multicast MAC Addresses. The switch can be configured to perform MLD Snooping and IGMP Snooping simultaneously.
