Configuring MVR6

Function Introduction

Multicast VLAN Registration for IPv6 (MVR6) is designed for applications using wide-scale deployment of IPv6 multicast traffic across an Ethernet ring-based service provider network (for example, the broadcast of IPv6 multiple television channels over a service-provider network). MVR6 allows a subscriber on a port to subscribe and unsubscribe to an IPv6 multicast stream on the network-wide multicast VLAN. It allows the single multicast VLAN to be shared in the network while subscribers remain in separate VLANs. MVR6 provides the ability to continuously send IPv6 multicast streams in the multicast VLAN, but to isolate the streams from the subscriber VLANs for bandwidth and security reasons.

MVR6 assumes that subscriber ports subscribe and unsubscribe (join and leave) these multicast streams by sending out MLD join and leave messages. These messages can originate from an MLD version-1-compatible host with an Ethernet connection. Although MVR6 operates on the underlying mechanism of MLD snooping, the two features operation affect with each other. One can be enabled or disabled with affecting the behavior of the other feature. If MLD snooping and MVR6 are both enabled, MVR6 reacts only to join and leave messages from IPv6 multicast groups configured under MVR6. The switch CPU identifies the MVR6 IPv6 multicast streams and their associated MAC addresses in the switch forwarding table, intercepts the MLD messages, and modifies the forwarding table to include or remove the subscriber as a receiver of the multicast stream, and the receivers must be in a different VLAN from the source. This forwarding behavior selectively allows traffic to cross between different VLANs.

Principle Description

N/A

step 1 Enter the configure mode

Configuring Switch:

Switch# configure terminal

Configuring Router:

Router configure terminal

step 2 Enter the vlan configure mode and create VLANs

Configuring Switch:

Switch(config)# vlan database
Switch(config-vlan)# vlan 111,10,30
Switch(config-vlan)# quit

step 3 Enter the interface configure mode and set the attributes of the interface

Interface configuration for Router:

Router(config) interface eth-0-1
Router(config-if) no switchport
Router(config-if) no shutdown
Router(config-if) ipv6 address 2001:1::1/64
Router(config-if) ipv6 pim sparse-mode
Router(config-if) end

Interface configuration for Switch:

Switch(config)# interface vlan 111
Switch(config-if)# exit
Switch(config)# interface vlan 10
Switch(config-if)# exit
Switch(config)# interface vlan 30
Switch(config-if)# exit
Switch(config)# interface eth-0-1
Switch(config-if)# switchport access vlan111
Switch(config-if)# exit
Switch(config)# interface eth-0-2
Switch(config-if)# switchport access vlan10
Switch(config-if)# exit
Switch(config)# interface eth-0-3
Switch(config-if)# switchport access vlan30
Switch(config-if)# exit

step 4 Enable MVR6

Eanble MVR6 in the switch, it is required that only one copy of IPv6 multicast traffic from the Router is sent to the switch, but the hosts can both receiver this IPv6 multicast traffic.

Switch(config)# no ipv6 multicast-routing
Switch(config)# mvr6
Switch(config)# mvr6 vlan 111
Switch(config)# mvr6 group ff0e::1234 64
Switch(config)# mvr6 source-address fe80::1111
Switch(config)# interface eth-0-1
Switch(config-if)# mvr6 type source
Switch(config-if)# exit
Switch(config)# interface eth-0-2
Switch(config-if)# mvr6 type receiver vlan 10
Switch(config-if)# exit
Switch(config)# interface eth-0-3
Switch(config-if)# mvr6 type receiver vlan 30
Switch(config-if)# exit

step 5 Exit the configure mode

Switch(config)# end

step 6 Validation

Display the result on Router:

Router show ipv6 mld groups
MLD Connected Group Membership
Group Address Interface Expires
ff0e::1234 eth-0-2 00:03:01
ff0e::1235 eth-0-2 00:03:01
ff0e::1236 eth-0-2 00:03:01
ff0e::1237 eth-0-2 00:03:01
ff0e::1238 eth-0-2 00:03:01
............
ff0e::1273 eth-0-2 00:03:01

Display the result on Switch:

Switch# show mvr6
MVR6 Running: TRUE
MVR6 Multicast VLAN: 111
MVR6 Source-address: fe80::111
MVR6 Max Multicast Groups: 1024
MVR6 Hw Rt Limit: 224
MVR6 Current Multicast Groups: 64
VLAN Interface Group Address Uptime Expire-time
10 eth-0-2 ff0e::1234 00:03:23 00:02:03
10 eth-0-2 ff0e::1235 00:03:23 00:02:03
10 eth-0-2 ff0e::1236 00:03:23 00:02:03
10 eth-0-2 ff0e::1237 00:03:23 00:02:03
10 eth-0-2 ff0e::1238 00:03:23 00:02:03
10 eth-0-2 ff0e::1239 00:03:23 00:02:03
......
10 eth-0-2 ff0e::1273 00:03:23 00:02:03