Chapter 25: Multicast
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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statically joins a group for all layer 2 interfaces on a layer 3 (sub)interface for which IGMP router functionality is enabled;
the second is at the layer 2 interface or mac-domain level and the third is at the cable-downstream level.
Layer 3 Static Joins
For a Layer 3 Ethernet interface static join:
configure interface {gigabitEthernet| tengigabitEthernet} <slot>/<port>[.<subif>] ip igmp static-
group <group> [source <source>]
For a Layer 3 DCAM cable-side interface static join:
configure interface cable-mac <mac>.<subif> ip igmp static-group <group> [source <source>]
The second is at the layer 2 interface level where the router statically joins the group on the layer 2 interface for all layer 3
interfaces for which the layer 3 interface contains the layer 2 interface and IGMP router functionality is enabled.
Note: For a Layer 3 static join, the subinterface is needed.
Layer 2 Static Joins
For a Layer 2 Ethernet interface static join:
configure interface {gigabitEthernet | tengigabitEthernet} <slot>/<port>[.<subif>] ip igmp static-
group <group> [source <source>]
For a Layer 2 DCAM cable-side interface static join:
configure interface cable-mac <mac> ip igmp static-group <group> [source <source>]
The third is at the cable downstream interface level where the router statically joins the group for a given cable
downstream.
Note: For a Layer 2 static join, the subinterface is not used.
For a cable downstream interface static join:
configure interface cable-downstream <slot>/<port> ip igmp static-group <group> [source <source>]
With both the Layer 2 and Layer 3 Static router join command, the no version of the command has the same effect as a
router leave command.
In addition to configuring the router to not do dynamic multicast (process IGMP messages) for individual multicast groups
via static router joins, all IGMP message processing may be turned off in order to allow for a state where all memberships