ZyXEL Communications 4528F Manual De Usuario

Chapter 24 Multicast

XGS-4526/4528F/4728F User’s Guide

IGMP Filtering

Select Active to enable IGMP filtering

 

to control which IGMP groups a 

subscriber on a port can join. 

Note: If you enable IGMP filtering, you must create and assign 

IGMP filtering profiles for the ports that you want to allow to 
join multicast groups.

Unknown 
Multicast Frame

Specify the action to perform when the Switch receives an unknown 
multicast frame. Select Drop to discard the frame(s). Select Flooding 
to send the frame(s) to all ports. 

Reserved 
Multicast Group

The IP address range of 224.0.0.0 to 224.0.0.255 are reserved for 
multicasting on the local network only. For example, 224.0.0.1 is for all 
hosts on a local network segment and 224.0.0.9 is used to send RIP 
routing information to all RIP v2 routers on the same network segment. 
A multicast router will not forward a packet with the destination IP 
address within this range to other networks. See the IANA web site for 
more information. 

The layer-2 multicast MAC addresses used by Cisco layer-2 protocols,  
01:00:0C:CC:CC:CC and 01:00:0C:CC:CC:CD, are also included in this 
group.

Specify the action to perform when the Switch receives a frame with a 
reserved multicast address. Select Drop to discard the frame(s). Select 
Flooding to send the frame(s) to all ports. 

Port

This field displays the port number. 

*

Settings in this row apply to all ports.

Use this row only if you want to make some settings the same for all 
ports. Use this row first to set the common settings and then make 
adjustments on a port-by-port basis. 

Note: Changes in this row are copied to all the ports as soon as 

you make them.

Immed. Leave

Select this option to set the Switch to remove this port from the 
multicast tree when an IGMP version 2 leave message is received on 
this port.

Select this option if there is only one host connected to this port. 

Normal Leave    Enter an IGMP normal leave timeout value (from 200 to 6,348,800) in 

miliseconds. Select this option to have the Switch use this timeout to 
update the forwarding table for the port. 

In normal leave mode, when the Switch receives an IGMP leave 
message from a host on a port, the Switch waits for IGMP reports after 
the multicast router sends out an IGMP Group-Specific Query (GSQ) 
message to determine whether other hosts connected to the port 
should remain in the specific multicast group.

This defines how many seconds the Switch waits for an IGMP report 
before removing an IGMP snooping membership entry when an IGMP 
leave message is received on this port from a host.

Table 63   Advanced Application > Multicast > Multicast Setting  (continued)