Igmp Filtering; Igmp Throttling - Allied Telesis Layer 3 Switches Network Manual

IGMP filtering

IGMP filtering lets you dictate exactly which multicast
groups a specific port can receive, by creating a filter list and
applying it to the port. Different ports may have different
filter lists applied to them.
If desired, you can select the type of message to filter. By
default, filters apply to IGMP reports. You can create extra
entries to also filter queries (type=query) and leave
messages (type=leave).
Configuration For each port:
1. Work out which groups you want users on the port to be able to join.
2. Create an IGMP filter.
3. Create entries to allow the appropriate groups (action=include).
Note:
4. Create an entry to block all groups (action=exclude). Give this entry a higher entry
number than entries for the included groups.
5. Apply the filter to the port.
To stop the user attached to port 1 from joining any group except 224.12.13.14:
Example

IGMP throttling

Throttling limits the number of multicast groups that an
individual port can join.
Example
To limit port 2 to a total of 6 groups:
Create A Secure Network With Allied Telesis Managed Layer 3 Switches
The order of entries in a filter is important. When IGMP tries to match a message
to a filter, it performs a linear search of the filter to find a matching entry. It tries
each entry in turn, and stops processing the filter after the first match it finds.
create igmp filter=1
add igmp filter=1 entry=1 group=224.12.13.14 action=include
add igmp filter=1 entry=2 group=224.0.0.0-239.255.255.255
action=exclude
set switch port=1 igmpfilter=1
set switch port=2 igmpmaxgroup=6
igmpaction=replace
Protecting the network
Products
All switches listed on page 2
that support 2.7.5 or later
Software Versions
2.7.5 or later
Products
All switches listed on page 2
that support 2.7.5 or later
Software Versions
2.7.5 or later
8