Chapter 24 Multicast

Table 67 Advanced Application > Multicast > Multicast Setting (continued)

LABEL

DESCRIPTION

Unknown

Specify the action to perform when the Switch receives an unknown multicast frame.

Multicast Frame

Select Drop to discard the frame(s). Select Flooding to send the frame(s) to all ports.

 

 

Reserved

The IP address range of 224.0.0.0 to 224.0.0.255 are reserved for multicasting on the

Multicast Group

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.

 

 

Fast Leave

Enter an IGMP fast 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 fast leave mode, right after receiving an IGMP leave message from a host on a port,

 

the Switch 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 helps speed up the leave process.

 

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.

 

 

Group Limited

Select this option to limit the number of multicast groups this port is allowed to join.

 

 

Max Group Num.

Enter the number of multicast groups this port is allowed to join. Once a port is registered

 

in the specified number of multicast groups, any new IGMP join report frame(s) is

 

dropped on this port.

 

 

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ES3500 Series User’s Guide