SNR S2940-8G-v2, Руководство по настройке

Страница: 270 / 420

SNR S2940-8G-v2 Switch Configuration Guide
IPv6 Multicast Protocol
Chapter 41
IPv6 Multicast Protocol
41.1 IPv6 DCSCM
41.2 MLD Snooping
41.2.1 Introduction to MLD Snooping
MLD, the Multicast Listener Discovery Protocol, is used to realize multicasting in the IPv6. MLD
is used by the network equipments such as routers which supports multicast for multicast listener
discovery, also used by listeners looking forward to join certain multicast group informing the router
to receive data packets from certain multicast address, all of which are done through MLD message
exchange. First the router send an MLD Multicast listener Query message through a multicast
address which can address all the listeners (namely ff02::1). Once there is a listener who wishes
to join the multicast address, it will send a MLD Multicast listener Report back through the multicast
address.
MLD Snooping is namely the MLD listening. The switch restricts the multicast traffic from
flooding through MLD Snooping, and forward the multicast traffic to ports associated to multicast
devices only. The switch listens to the MLD messages between multicast routers and listeners, and
maintains the multicast group forwarding list based on the listening result. The switches forwards
multicast packets according to the multicast forwarding list
The switch realizes the MLD Snooping function while supporting MLD v2. This way, the user
can acquire IPv6 multicast with the switch.
41.2.2 MLD Snooping Configuration Task
1. Enable the MLD Snooping function
2. Configure the MLD Snooping
1. Enable the MLD Snooping function
Command Explanation
Global Mode
ipv6 mld snooping
no ipv6 mld snooping Enable global MLD Snooping, the 'no ipv6 mld snooping'
command disables the global MLD snooping.
270