167
•
If only IGMP is enabled on the router, or if both IGMP and PIM are enabled on the router, the router
does the following:
{
Maintains dynamic member ports or dynamic router ports according to IGMP packets
{
Maintains dynamic router ports according to PIM hello packets
•
If only PIM is enabled on the router, the following occur:
{
The router broadcasts IGMP messages as unknown messages in the VLAN.
{
After receiving a PIM hello message, the router maintains the corresponding dynamic router
port.
•
If IGMP is disabled on the router, one of the following occurs:
{
If PIM is disabled, the router deletes all its dynamic member ports and dynamic router ports.
{
If PIM is enabled, the router deletes only its dynamic member ports but not its dynamic router
ports.
NOTE:
On a router with Layer-3 multicast routing enabled, use the
display igmp group port-info
command to
view Layer-2 port information.
•
If PIM is disabled on the router, one of the following occurs:
{
If IGMP is disabled, the router deletes all its dynamic router ports.
{
If IGMP is enabled, the router maintains all its dynamic member ports and dynamic router ports.