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30 IGMP Enhancements Release Note

Software Version 2.7.5

C613-10454-00 REV A

Order of entries The order of entries in a filter is important. When IGMP tries to match a

Membership Report to a filter, it performs a linear search of the filter to find a

matching entry. Each entry is tried in turn, and processing stops at the first

match found.

Address ranges can overlap. If the address range of an entry falls entirely

within the address range of another entry, the entry with the smaller address

range should appear first in the filter. Otherwise it will never be matched

against a Membership Report.

Performance can be improved by arranging the entries in a filter to achieve the

earliest possible match.

Configuring IGMP

filters

To configure an IGMP filter, you must create the filter and then apply it to one

or more switch ports.

To do this, first create the filter, using the command:

create igmp filter=filter-id

Then add one or more entries to the filter, using the command:

add igmp filter=filter-id groupaddress=ipadd[-ipadd]

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

Finally, apply the filter to a switch port, using the command:

set switch port={port-list|all} igmpfilter=filter-id

[other-options...]

You can apply an IGMP filter to more than one switch port, but a single switch

port can have only one IGMP filter assigned to it.

To delete or modify an entry in a filter, use the commands:

delete igmp filter=filter-id entry=1..65535

set igmp filter=filter-id entry=1..65535

groupaddress=ipadd[-ipadd] action={include|exclude}

To remove a filter from a switch port, use the command:

set switch port={port-list|all} igmpfilter=none

[other-options...]

To destroy a filter, first remove the filter from all ports that it is applied to, then

use the command:

destroy igmp filter=filter-id

To display information about IGMP filters, use the command:

show igmp filter=filter-id

To display the IGMP filter assigned to a switch port, use the command:

show switch port[={port-list|all}]

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Allied Telesis AT-8824 Guía de instalación Pagina 30