User's Manual

Table Of Contents
Users Manual of SGS-5240 Series Managed Switch
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Join Success The number of times a multicast group was successfully joined.
Group The number of MVR groups active on this interface. Output Statistics
Report The number of IGMP membership reports sent from this interface.
Leave The number of leave messages sent from this interface.
G Query The number of general query messages sent from this interface.
G(-S)-S Query The number of group specific or group-and-source specific query messages sent from this interface.
4.2.15 MVR For IPv6
4.2.15.1 Configure Global
Switch Management > MVR for IPv6 >Configure Global page is used to configure proxy switching and the robustness variable.
Proxy Switching Configures MVR proxy switching, where the source port acts as a host, and the receiver port acts as an
MVR router with querier service enabled. (Default: Enabled)
When MVR proxy-switching is enabled, an MVR source port serves as the upstream or host interface, and the MVR
receiver port serves as the querier. The source port performs only the host portion of MVR by sending summarized
membership reports, and automatically disables MVR router functions.
Receiver ports are known as downstream or router interfaces. These interfaces perform the standard MVR router
functions by maintaining a database of all MVR subscriptions on the downstream interface. Receiver ports must
therefore be configured on all downstream interfaces which require MVR proxy service.
When the source port receives report and leave messages, it only forwards them to other source ports.
When receiver ports receive any query messages, they are dropped.
When changes occurring in the downstream MVR groups are learned by the receiver ports through report and leave
messages, an MVR state change report is created and sent to the upstream source port, which in turn forwards this
information upstream.
When MVR proxy switching is disabled:
Any membership reports received from receiver/source ports are forwarded to all source ports.
When a source port receives a query message, it will be forwarded to all downstream receiver ports.
When a receiver port receives a query message, it will be dropped.
Robustness Value Configures the expected packet loss, and thereby the number of times to generate report and
group-specific queries. (Range: 1-10; Default: 2)
This parameter is used to set the number of times report messages are sent upstream when changes are learned
about downstream groups, and the number of times group-specific queries are sent to downstream receiver ports.
This parameter only takes effect when MVR6 proxy switching is enabled.
Proxy Query Interval Configures the interval at which the receiver port sends out general queries. (Range: 2-31744
seconds; Default: 125 seconds)