Chapter 25: Multicast
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 786
Group filter-mode: Include
Group source list
(IN) 20.20.20.2 Expires: 0h3m19s
235.10.0.124 cable-mac 1.0 0d22h9m 0h3m20s 0h0m0s 0h3m20s 10.110.58.239
Group filter-mode: Exclude
Empty source list
235.52.0.127 cable-mac 1.0 0d22h15m never N/A N/A N/A
Group filter-mode: Include
Group source list:
(IN) 17.17.17.2 Expires: never
235.52.0.129 cable-mac 1.0 0d22h10m never N/A N/A N/A
Group filter-mode: Exclude
Empty source list
235.52.0.133 cable-mac 1.0 0d22h10m never N/A N/A N/A
Group filter-mode: Exclude
Empty source list
IGMP ACLs
The IGMP ACL feature provides support for standard ACLs that define which multicast groups can be joined on a given
interface. In other words, the ACL is provisioned to filter IGMP join requests on the basis of IP subinterfaces (VRIs). Only
standard ACLs are supported for filtering IGMP membership reports.
Example 1
Objective: To permit membership only in the 239.255.0.0/16 range for cable-mac 1.0:
The following command permits any joins in the 239.255.X.X range:
configure access-list 10 permit 239.255.0.0 0.0.255.255
There is an implicit deny to any other multicast IP ranges.
The following command applies the ACL to the IGMP-configured interface:
configure interface cable-mac 1.0 ip igmp access-group 10
Example 2
Objective: To deny any joins in the 225.0.0.X range and permit all other multicast ranges for cable-mac 1.0:
The following command denies any joins in the 225.0.0.X range:
configure access-list 10 deny 225.0.0.0 0.0.0.255
The following command permits membership in any other multicast IP range:
configure access-list 10 permit any
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