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GMRP 203
[SW8800]pim
[SW8800-pim] c-rp vlan-interface 10 group-policy 2005
4 Configure PIM domain border.
[SW8800]interface vlan-interface 12
[SW8800-vlan-interface12] pim bsr-boundary
After VLAN-interface 12 is configured as BSR, the LS_D will be excluded from the
local PIM domain and cannot receive the BSR information transmitted from LS_B
anymore.
Configure Switch C:
1 Enable PIM-SM.
[SW8800]multicast routing-enable
[SW8800]vlan 10
[SW8800-vlan10] port GigabitEthernet1/1/2 to GigabitEthernet1/1/3
[SW8800-vlan10] quit
[SW8800]pim
[SW8800-pim] interface vlan-interface 10
[SW8800-vlan-interface10] pim sm
[SW8800-vlan-interface10] quit
[SW8800]vlan 11
[SW8800-vlan11] port GigabitEthernet1/1/4 to GigabitEthernet1/1/5
[SW8800-vlan11] quit
[SW8800]pim
[SW8800-pim] interface vlan-interface 11
[SW8800-vlan-interface11] pim sm
[SW8800-vlan-interface11] quit
[SW8800]vlan 12
[SW8800-vlan12] port GigabitEthernet1/1/6 to GigabitEthernet1/1/7
[SW8800-vlan12] quit
[SW8800]pim
[SW8800-pim] interface vlan-interface 12
[SW8800-vlan-interface12] pim sm
[SW8800-vlan-interface12] quit
GMRP GMRP (GARP Multicast Registration Protocol), based on GARP, is used for
maintaining dynamic multicast registration information. All the switches
supporting GMRP can receive multicast registration information from other
switches, and dynamically update local multicast registration information. Local
multicast registration information can be transmitted to other switches. This
information switching mechanism keeps consistency of multicast information
maintained by every GMRP-supporting device in the same switching network.
A host transmits GMRP Join message. After receiving the message, the switch
adds the port to the multicast group, and broadcasts the message throughout the
VLAN; thereby the multicast source in the VLAN knows the multicast member.
When the multicast source sends packets to its group, the switch only forwards
the packets to the ports connected to members, thereby implementing the Layer 2
multicast in VLAN.