ECS4510 Series Web Management Guide-R03

Table Of Contents
Chapter 14
| Multicast Filtering
Multicast VLAN Registration for IPv4
– 566 –
Interfaces” on page 574).
Although MVR operates on the underlying mechanism of IGMP snooping, the
two features operate independently of each other. One can be enabled or
disabled without affecting the behavior of the other. However, if IGMP
snooping and MVR are both enabled, MVR reacts only to join and leave
messages from multicast groups configured under MVR. Join and leave
messages from all other multicast groups are managed by IGMP snooping.
Also, note that only IGMP version 2 or 3 hosts can issue multicast join or leave
messages. Since IGMP version 1 hosts do not support leave messages, they are
timed out by the switch.
Configuring MVR
Global Settings
Use the Multicast > MVR (Configure Global) page to configure proxy switching and
the robustness variable.
Parameters
These parameters are displayed:
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.