Advantech EKI-9512-C0IDW10E, Руководство пользователя

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EKI-9500 Series User Manual 188
4.4.10 MLD Snooping
4.4.10.1 Configuration
Use the MLD Snooping Configuration and Status page to enable Multicast Listener
Discovery (MLD) snooping on the device and to view global status information. In
IPv4, Layer 2 switches can use IGMP snooping to limit the flooding of multicast traffic
by dynamically configuring Layer 2 interfaces so that multicast traffic is forwarded to
only those interfaces associated with IP multicast address. In IPv6 networks, MLD
snooping performs a similar function. With MLD snooping, IPv6 multicast data is
selectively forwarded to a list of ports intended to receive the data (instead of being
flooded to all of the ports in a VLAN). This list is constructed by snooping IPv6 multi-
cast control packets.
To access this page, click Switching > MLD Snooping > Configuration .
Figure 4.204 Switching > MLD Snooping > Configuration
The following table describes the items in the previous figure.
State The operational state of the IGMP snooping querier on the VLAN,
which is one of the following:

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 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 the 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.
Version The operational IGMP protocol version of the querier.
Last IP Address The IP address of the last querier from which a query was snooped on
the VLAN.
Last Version The IGMP protocol version of the last querier from which a query was
snooped on the VLAN.
Max Response Time
(Seconds) The maximum response time to be used in the queries that are sent by
the snooping querier.
Refresh Click Refresh to update the screen.
Item Description
Item Description
MLD Snooping
Admin Mode The administrative mode of MLD snooping on the device.
Multicast Control
Frame Count The number of multicast control frames that have been processed by
the CPU.
Data Frames For-
warded by CPU The number of data frames forwarded by the CPU.
Submit Click Submit to save the values and update the screen.