278Disabling a port from becoming a dynamic router portThe following problems exist in a multicast access network:• After receiving an MLD general query or IPv6 PIM hello message from a connected host, a routerport becomes a dynamic router port. Before its timer expires, this dynamic router port receives allmulticast packets within the VLAN where the port belongs, and forwards them to the host, affectingnormal multicast reception of the host.• In addition, the MLD general query and IPv6 PIM hello message that the host sends affects themulticast routing protocol state on Layer 3 devices, such as the MLD querier or DR election, andmight further cause network interruption.To solve these problems, disable that router port from becoming a dynamic router port after the portreceives an MLD general query or IPv6 PIM hello message, so as to improve network security and controlover multicast users.To disable a port from becoming a dynamic router port:Step Command Remarks1. Enter system view. system-view N/A2. Enter Layer 2 Ethernetinterface view, Layer 2aggregate interface view, orport group view.• Enter Layer 2 Ethernet interfaceview or Layer 2 aggregateinterface view:interface interface-typeinterface-number• Enter port group view:port-group manualport-group-nameUse either command.3. Disable the port frombecoming a dynamic routerport.mld-snooping router-port-deny[ vlan vlan-list ]By default, a port can become adynamic router port.NOTE:This configuration does not affect the static router port configuration.Configuring MLD snooping querierBefore you configure MLD snooping querier, complete the following tasks:• Enable MLD snooping in the VLAN.• Determine the MLD general query interval.• Determine the MLD last-member query interval.• Determine the maximum response time for MLD general queries.• Determine the source IPv6 address of MLD general queries.
