3com 8807 User Guide

C

HAPTER

 41: C

OMMON

 M

ULTICAST

 C

ONFIGURATION

As shown in Figure 107, HostA and HostB join the multicast group. Layer 3 
multicast is enabled on LSA, LSB, LSC and LSD. Managed multicast is enabled on 
LSA and LSC. Because managed multicast combines multicast with 802.1x, 802.1x 
must be enabled on LSA and LSC.

Figure 107   Network diagram for managed multicast

Managed multicast is a module combined with 802.1x, so you need to perform 
the following configuration beside multicast configuration:

# Enable managed multicast globally.

<SW8800>system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800] ip managed-multicast 

# Enable 802.1x globally.

[SW8800] dot1x 

# Enable 802.1x on the controlled ports (the access ports for LSA and LSC).

[SW8800]interface GigabitEthernet2/1/1

 

[3Com-GigabitEthernet2/1/1] dot1x 

 

[3Com-GigabitEthernet2/1/1] interface GigabitEthernet2/1/2

 

[3Com-GigabitEthernet2/1/2] dot1x  

# Configure the authentication mode on the controlled ports to port-based mode.

[3Com-GigabitEthernet2/1/2] dot1x port-method portbased

 

[3Com-GigabitEthernet2/1/2] interface GigabitEthernet2/1/1

 

[3Com-GigabitEthernet2/1/1] dot1x port-method portbased

 

[3Com-GigabitEthernet2/1/1] quit 

LSD

LSB

LSC

LSA

VLAN11

VLAN12

VLAN10

VLAN10

VLAN11

VLAN12

VLAN12

VLAN10

VLAN11

LSD

LSB

LSC

LSA

HostB

VLAN11

VLAN12

VLAN10

VLAN10

VLAN11

VLAN12

VLAN12

VLAN10

VLAN11

Host

A

LSD

LSB

LSC

LSA

VLAN11

VLAN12

VLAN10

VLAN10

VLAN11

VLAN12

VLAN12

VLAN10

VLAN11

LSD

LSB

LSC

LSA

HostB

VLAN11

VLAN12

VLAN10

VLAN10

VLAN11

VLAN12

VLAN12

VLAN10

VLAN11

Host

A