ZyXEL Communications Corporation VSG1435B101 Manuel D’Utilisation

Chapter 14 IGMP

VSG1435-B101 Series User’s Guide

Use the IGMP General screen to configure general IGMP proxy and IGMP packet 
processing settings.

Click Network Settings > IGMP Setting > General to open the following 
screen.

Figure 82   Network Settings > IGMP Setting > General  

The following table describes the fields in this screen.

Table 56   Network Settings > IGMP Setting > General 

IGMP Proxy

Enable this to have the ZyXEL Device reduce multicast traffic by 
issuing IGMP host messages to a multicast router or server on behalf 
of the multicast hosts connected to the IGMP proxy device. 

Query Interval 

Specify how many seconds since the last query the ZyXEL Device waits 
before it 

queries all 

directly connected networks to gather multicast 

group membership.

Query Response 
Interval

Specify how many seconds the host allots for gathering membership 
information from

 

directly connected networks before it sends a report.

Robustness 
Value

This is the number of times the host sends a report to the ZyXEL 
Device when the ZyXEL Device queries for the host’s status.

IGMP Packet 
Process

Select one or more of these fields to increase the IGMP network’s 
security or control which types of IGMP packets the ZyXEL Device 
forwards. 

Ignore IGMP 
packets not from 
LAN subnet 

Select this to discard IGMP packets from IP addresses other than the 
LAN subnet.