Specifications

Configuring IP Multicast Multilayer Switching
IP Multicast MLS Configuration Examples
9
Figure 70 Complex IP Multicast MLS Example Network
The network is configured as follows:
• There are four VLANs (IP subnetworks): VLANs 1, 10, 20, and 30 (VLAN 1 is used only for
management traffic, not multicast data traffic).
• The G1 multicast source belongs to VLAN 10.
• Hosts A, C, D, and E have joined IP multicast group G1.
• Switch A is the MMLS-SE.
• Router A and Router B are both operating as MMLS-RPs.
• Port 1/1 on the MMLS-SE is connected to interface fastethernet1/0 on Router A.
• Port 1/2 on the MMLS-SE is connected to interface fastethernet2/0 on Router B.
• The MMLS-SE is connected to the MMLS-RPs through ISL trunk links.
• The trunk link to Router A carries VLANs 1, 10, and 20.
• The trunk link to Router B carries VLANs 1, 10, and 30.
• The subinterfaces on the Router A interface have these IP addresses:
– fastethernet1/0.1: 172.20.1.1 255.255.255.0 (VLAN 1)
– fastethernet1/0.10: 172.20.10.1 255.255.255.0 (VLAN 10)
– fastethernet1/0.20: 172.20.20.1 255.255.255.0 (VLAN 20)
• The subinterfaces on the Router B interface have these IP addresses:
– fastethernet1/0.1: 172.20.1.2 255.255.255.0 (VLAN 1)
– fastethernet2/0.10: 172.20.10.100 255.255.255.0 (VLAN 10)
– fastethernet2/0.30: 172.20.30.100 255.255.255.0 (VLAN 30)
• The default IP multicast MLS management interface is used on both MMLS-RPs (VLAN 1).
• Port 1/3 on the MMLS-SE is connected to Switch B through an ISL trunk link carrying all VLANs.
• Port 1/4 on the MMLS-SE is connected to Switch C through an ISL trunk link carrying all VLANs.
Router A
(MMLS-RP)
Router B
(MMLS-RP)
ISL trunks
VLANs 10, 30
VLANs 10, 20
Switch A
(MMLS-SE)
VLAN 20
172.20.20.0/24
VLAN 30
172.20.30.0/24
VLAN 10
172.20.10.0/24
C
AB DEF
G1 G1
G1
G1
G1 source
18955
Switch B Switch C