Connected Igmp Hosts; Controlling Access To An Ssm Network Using Igmp Extended Access Lists; Example: Configuring The Device To Forward Multicast Traffic In The Absence Of Directly Connected Igmp Hosts - Cisco Catalyst 3650 Configuration Manual

Example: Configuring the Device to Forward Multicast Traffic in the Absence of Directly Connected IGMP Hosts

Device# show run interface vlan 150
Current configuration : 137 bytes
!
interface Vlan150
ip address 20.20.20.1 255.255.255.0
ip pim sparse-dense-mode
ip igmp static-group 224.1.2.3 source 15.15.15.2
end
Example: Configuring the Device to Forward Multicast Traffic in the Absence
of Directly Connected IGMP Hosts
The following example shows how to configure a device to forward multicast traffic in the absence of directly
connected IGMP hosts using the ip igmp join-group command. With this method, the device accepts the
multicast packets in addition to forwarding them. Accepting the multicast packets prevents the device from
fast switching.
In this example, Fast Ethernet interface 0/0/0 on the device is configured to join the group 225.2.2.2:
interface FastEthernet0/0/0
ip igmp join-group 225.2.2.2
The following example shows how to configure a device to forward multicast traffic in the absence of directly
connected IGMP hosts using the ip igmp static-group command. With this method, the device does not
accept the packets itself, but only forwards them. Hence, this method allows fast switching. The outgoing
interface appears in the IGMP cache, but the device itself is not a member, as evidenced by lack of an "L"
(local) flag in the multicast route entry.
In this example, static group membership entries for group 225.2.2.2 are configured on Fast Ethernet interface
0/1/0:
interface FastEthernet0/1/0
ip igmp static-group 225.2.2.2
Related Topics
Configuring the Device to Forward Multicast Traffic in the Absence of Directly Connected IGMP Hosts,
on page 53

Controlling Access to an SSM Network Using IGMP Extended Access Lists

This section contains the following configuration examples for controlling access to an SSM network using
IGMP extended access lists:
Note Keep in mind that access lists are very flexible: there are many combinations of permit and deny statements
one could use in an access list to filter multicast traffic. The examples in this section simply provide a few
examples of how it can be done.
Related Topics
Controlling Access to an SSM Network Using IGMP Extended Access Lists, on page 54
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3SE (Catalyst 3650 Switches)
84
Configuring IGMP
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