Brocade TurboIron 24X Series Configuration Guide - Manual (Page 830)

796 Brocade TurboIron 24X Series Configuration Guide
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Changing global IP multicast parameters
Defining the maximum number of PIM cache entries
The PIM cache system parameter defines the maximum number of repeated PIM traffic being sent
from the same source address and being received by the same destination address. To define this
maximum, enter a command such as the following.
TurboIron(config)#system-max pim-mcache 999
Syntax: system-max pim-mcache <num>
The <num> parameter specifies the maximum number of multicast cache entries for PIM. Enter a
number from 256 – 4096. The default is 1024.
Changing IGMP V1 and V2 parameters
IGMP allows devices to limit the multicast of IGMP packets to only those ports on the router that
are identified as IP Multicast members. This section applies to devices that support IGMP versions
1 and 2.
The router actively sends out host queries to identify IP Multicast groups on the network, inserts
the group information in an IGMP packet, and forwards the packet to IP Multicast neighbors.
The following IGMP V1 and V2 parameters apply to PIM:
• IGMP query interval – Specifies how often the Layer 3 Switch queries an interface for group
membership. Possible values are 1 – 3600. The default is 60.
• IGMP group membership time – Specifies how many seconds an IP Multicast group can remain
on a Layer 3 Switch interface in the absence of a group report. Possible values are 1 – 7200.
The default is 60.
• IGMP maximum response time – Specifies how many seconds the Layer 3 Switch will wait for
an IGMP response from an interface before concluding that the group member on that
interface is down and removing the interface from the group. Possible values are 1 – 10. The
default is 5.
To change these parameters, you must first enable IP multicast routing by entering the following CLI
command at the global CLI level.
TurboIron(config)#ip multicast-routing
Syntax: [no] ip multicast-routing
NOTE
You must enter the ip multicast-routing command before changing the global IP Multicast
parameters. Otherwise, the changes do not take effect and the software uses the default values.
Modifying IGMP (V1 and V2) query interval period
The IGMP query interval period defines how often a router will query an interface for group
membership. Possible values are 1-3, 600 seconds and the default value is 60 seconds.
To modify the default value for the IGMP (V1 and V2) query interval, enter the following.
TurboIron(config)#ip igmp query 120
Syntax: ip igmp query-interval <1-3600>