User's Manual

Table Of Contents
521
Users Manual of CS-6306R
50.4.2.5 Clearing Item (S,G)
Normally, item (S,G) in the local MRT or the statistics value of the multicast message number forwarded
through item (S,G) need be cleared. Run the following commands in management mode.
Command Purpose
clear ip mroute pim-dm {* | group
[source]}
Clears the item (S,G) in the local MRT.
The operation is to delete all or part items of the
local multicast routing table. Multicast message
forwarding may be affected. The command is
used to delete only the (S,G) items created by
the PIM-DM multicast routing protocol on the
upstream ports.
clear ip pim-dm interface
Resets the statistics value of multicast message
forwarded by (S,G) on the PIM-DM port. The
command is used to reset only the (S,G) items
created by the PIM-DM multicast routing protocol
on the upstream ports.
50.4.3 PIM-DM State-Refresh Configuration Example
Refer to section 4.2.2 “Configuring State-Refresh”.
Configuring PIM-SM 50.5
50.5.1 PIM-SM Introduction
Protocol Independent Multicast Spare Mode (PIM-SM) is a multicast routing protocol in sparse mode. In the
PIM-SM domain, the switches that run PIM-SM periodically send the Hello information to achieve the
following purposes:
Discover neighboring PIM-SM switches.
Select the designated router (DR) in the multi-access network.
As shown in the following figure, the DR sends the join/prune message to the directly-connected group
members at the direction of multicast distribution tree, or sends the data of the directly-connected multicast
source to the multicast distribution tree.