8-12
Stinger®
IP2000 Configuration Guide
IP Multicast Configuration
Configuring multicast client interfaces
Setting IGMP-v2 timers (local profiles only)
The system calculates the timeout value for IGMPv1 and IGMPv2 members using the
rule described in RFC 2236 Internet Group Management Protocol, Version 2. The rule is as
follows:
Timeout-value
= (
query-interval
x
robust-count
+
query-response-interval/10
)
You can control the timeout value by setting the
query-interval
,
robust-count,
or
query-response-interval
parameters for an IGMPv1 or IGMPv2 member.
The following parameters, shown with default values, are used to configure the
timers defined in RFC 2236 on multicast client interfaces:
[in CONNECTION/"":ip-options:igmp-options]
robust-count = 2
multicast-group-
leave-delay
Ascend-Multicast-
Grp-Leave-Delay
(111)
Number of seconds to delay before forwarding a Leave
Group message. The sum of (
multicast-group-leave-
delay
× 1000) plus
multicast-group-leave-delay-msec
is the number of milliseconds the system waits before
forwarding to the MBONE router an IGMP version-2
Leave Group message it receives across a multicast
client interface. With the zero default values, the system
forwards the Leave Group messages immediately. For
client interfaces that support multiple multicast sessions
to the same group, set these parameters to a value from
10 to 20.
When these parameters have nonzero values, the
system sends back a query to make sure there are no
active multicast sessions on the interface for that group,
and if it receives a response before the specified,
specified delay expires, it does not forward the Leave
Group message.
multicast-group-
leave-delay-msec
Ascend-Multicast-
GLeave-Delay-Msec
Number of milliseconds to add to the value of
(
multicast-group-leave-delay
× 1000) to determine
the total delay before forwarding a Leave Group
message.
multicast-service-
profile
Ascend-Multicast-
Service-Profile-Name
(274)
Name of a configured multicast services profile that
filters multicast group access for this client interface.
The filtering affects all new client links on the interface,
and affects old client links after the expiration of
query-
response-interval
. (See “Setting IGMP-v2 timers (local
profiles only)” on page 8-12.) For information about
configuring a multicast service profile, see “Managing
multicast group memberships” on page 8-8.
multicast-max-
groups
Ascend-Multicast-
Max-Groups (275)
Maximum number of accessible multicast group (from
0 to 250) for this client interface. You can set this to a
lower number to limit multicast traffic to the interface.
This value of this parameter limits the activation of new
client links, but does not affect the existing client links.
Parameter
RADIUS attribute
Setting