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Configure switch 1 – Allied Telesis AR400 User Manual

Page 36

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Page 36 | AlliedWare™ OS How To Note: IGMP

IGMP filtering (controlling multicast distribution) > Example

Switch 1—the closest switch to the multicast source—is an IGMP Querier. The filter is
configured on it, as shown in bold in the script below.

Note that 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, starting with the
lowest-numbered entry. It stops processing the filter at the first match it finds. Therefore,
this filter has an entry with one multicast group and an action of exclude, followed by an
entry with all multicast groups and an (implicit) action of include.

Different

message

types

Also note that in software versions 2.8.1 and later, each entry filters only one type of IGMP
message. To control the type of message, use the msgtype parameter in the following
command:

add igmp filter=filter-id groupaddress={ipadd|ipadd-ipadd}

[entry=1..65535] [action={include|exclude}] [msgtype={query|

report|leave}]

In software version 2.8.1, this parameter is mandatory. Since software versions 281-01 and
2.9.1, the parameter is optional with a default of report. In this example we are filtering
Reports, so we do not need to specify the message type.

X

Configure switch 1

set system name="Switch 1"

# STP general configuration

enable stp=default

set stp=default mode=rapid

set stp=default port=1 edgeport=yes

# VLAN general configuration

create vlan=vlan100 vid=100

add vlan=100 port=1-52

# Switching configuration

set switch port=1 igmpfilter=1

# IP configuration

enable ip

add ip int=vlan100 ip=172.31.0.254 mask=255.255.255.0

enable ip igmp

enable ip igmp int=vlan100

create igmp filter=1

add igmp filter=1 entry=1 group=224.0.1.22 action=exclude

add igmp filter=1 entry=2 group=224.0.0.0-239.255.255.255

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