ARRIS 2247-N8-10NA (v9.1.x) Admin Handbook User Manual
Page 48
Administrator’s Handbook
48
Querier Version
– select a version of the IGMP Querier: version 1, version 2, or version 3. If you know you
will be communicating with other hosts that are limited to v1 or v2, for backward compatibility, select
accordingly; otherwise, allow the default v3.
Fast Leave
– set to
off
by default, fast leave enables a non-standard expedited leave mechanism. The que-
rier keeps track of which client is requesting which channel by IP address. When a leave message is received,
the querier can check its internal table to see if there are any more clients on this group. If there are none, it
immediately sends an IGMP leave message to the upstream querier.
Log Enable
– If set to on, all IGMP messages on both the LAN and the WAN will be logged.
Wireless Multicast to Unicast conversion
– Only available if
IGMP Snooping
is enabled. If set to
on
, the
gateway replaces the multicast MAC-address with the physical MAC-address of the wireless client. If there is
more than one wireless client interested in the same multicast group, the gateway will revert to multicasting
the stream immediately. When one or more wireless clients leave a group, and the gateway determines that
only a single wireless client is interested in the stream, it will once again unicast the stream.
set ip igmp querier-version [ 1 | 2 | 3 ]
Sets the IGMP querier version: version 1, version 2, or version 3. If you know you will be communicating with
other hosts that are limited to v1, for backward compatibility, select 1; otherwise, allow the default 3.
set ip igmp robustness value
Sets IGMP robustness range: from 2 – 255. The default is 2.
set ip igmp query-interval value
Sets the query-interval range: from 10 seconds – 600 seconds, The default is 125 seconds.
set ip igmp query-response-interval value
Sets the query-response interval range: from 5 deci-seconds (tenths of a second) – 255 deci-seconds. The
default is 100 deci-seconds.
set ip igmp unsolicited-report-interval value
Sets the unsolicited report interval: the amount of time in seconds between repetitions of a particular com-
puter’s initial report of membership in a group. The default is 10 seconds.
set ip igmp fast-leave [ off | on ]
Sets fast leave
on
or
off
. Set to
on
by default, fast leave enables a non-standard expedited leave mechanism.
The querier keeps track of which client is requesting which channel by IP address. When a leave message is
received, the querier can check its internal table to see if there are any more clients on this group. If there are
none, it immediately sends an IGMP leave message to the upstream querier.
set ip igmp fowarding-filters multicast-group group name
Sets an IGMP fowarding filter for a multicast group.
NOTE:
IGMP Querier version is relevant only if the gateway is configured for IGMP forwarding. If any IGMP v1 rout-
ers are present on the subnet, the querier must use IGMP v1. The use of IGMP v1 must be administratively
configured, since there is no reliable way of dynamically determining whether IGMP v1 routers are present
on a network. IGMP forwarding is enabled per IP Profile and WAN Connection Profile.