IPv6 Multicast BSR and RP Example

Multicast for IPv6 can be configured using static RPs, BSR or embedded RP. In this example I want to show you how to configure IPv6 multicast using BSR. This is the topology that I will use:

IPv6 Multicast BSR RP

Above we have 3 routers. R1 will be the receiver of the multicast stream, R2 will be the BSR and R3 will be the RP. First we’ll have to do our homework and configure all IPv6 addresses on the interfaces:

R1(config)#ipv6 unicast-routing 
R1(config)#interface fastEthernet 0/0
R1(config-if)#ipv6 address 2001:12::1/64
R2(config)#ipv6 unicast-routing 
R2(config)#interface fastEthernet 0/0
R2(config-if)#ipv6 enable
R2(config)#interface fastEthernet 1/1 
R2(config-if)#ipv6 enable
R2(config-if)#exit R2(config)#interface loopback 0 R2(config-if)#ipv6 address 2001::2/128
R3(config)#ipv6 unicast-routing 
R3(config)#interface fastEthernet 0/0
R3(config-if)#ipv6 enable
R3(config)#interface loopback 0
R3(config-if)#ipv6 address 2001::3/128

With the IPv6 addresses up and running we can configure EIGRP to advertise the loopback interfaces of R2/R3 and the 2001:12::/64 network between R1/R2:

R1(config)#ipv6 router eigrp 1
R1(config-rtr)#no shutdown
R1(config)#interface fastEthernet 0/0
R1(config-if)#ipv6 eigrp 1 
R2(config)#ipv6 router eigrp 1
R2(config-rtr)#no shutdown
R2(config)#interface loopback 0
R2(config-if)#ipv6 eigrp 1
R2(config)#interface fastEthernet 0/0
R2(config-if)#ipv6 eigrp 1 
R2(config)#interface fastEthernet 1/1
R2(config-if)#ipv6 eigrp 1 
R3(config)#ipv6 unicast-routing 
R3(config)#ipv6 router eigrp 1
R3(config-rtr)#no shutdown
R3(config)#interface loopback 0
R3(config-if)#ipv6 eigrp 1
R3(config)#interface fastEthernet 0/0
R3(config-if)#ipv6 eigrp 1 

Because I don’t have any IPv4 addresses I have to configure an EIGRP router ID myself. With the configuration above the 2001:12::/64, 2001::2/128 and 2001::3/128 networks should be reachable from any router. Now we can continue with our multicast setup:

R1,R2 & R3:
(config)#ipv6 multicast-routing

First enable multicast routing for IPv6 or we are going nowhere. Next step is to configure the RP and BSR:

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Forum Replies

  1. best CCIE R/S explanation …thanks

  2. Hi,

    we did not use a command like ipv6 pim sparse-mode but the pim neighborship is established. How can ipv6 establish this?


  3. Hi Rene and staff,
    i am trying to test multicast scope in a basic lab


    My goal is to build a site-local scope with all the routers and to test connectivity using multicast address FF05::2
    So i want to ping FF05::2 from R4 and hope to receive replies from R1,R2,R3
    From the perspective of R4, at the beginning, join groups are
    FF02::1 because R4 is a IPV6 node
    FF02::2 because i set ipv6 unicast-routing
    FF02::1:FF00:4 because of SNMA corresponding to link

    ... Continue reading in our forum

  4. thanks Laz, understood,
    but in my lab, how can i link ULA with multicast group ff05::2 ?

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