Taicom Data Systems Co Ltd AWL1000G ユーザーズマニュアル

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  On CO side, there must be at least one IGMP querier (router) present. IGMP querier will 
send IGMP query packet. The Router is responsible to relay these IGMP queries to 
Ethernet. 
  End-user multicast application device sends IGMP report while receiving IGMP query or 
being activated by the user. The Router should be responsible to proxy (that is, change 
source IP to Router’s WAN IP) the IGMP report to ADSL WAN side, including all PVCs. 
The same case is for IGMP leave packet. 
  Not necessary to relay multicast routing between two ADSL PVCs or two interfaces in 
LAN side. 
  Special purpose multicast packet (such as RIP 2 packet) should run without Interference. 
 
Table 5-2. Packet Process 
Rx Entity 
Packet Class 
TTL 
Action 
IGMP query 
Relay to Ethernet 
IGMP report 
Ignore 
IGMP leave 
Ignore 
ADSL 
General Multicast IP 
Relay it to Ethernet 
IGMP query 
Ignore 
IGMP report 
Relay to all ADSL PVCs 
IGMP leave 
Relay to all ADSL PVCs 
Ethernet 
General Multicast IP 
Ignore 
 
Before the IGMP mode is enabled; please go to the Miscellaneous Configuration page to 
enable the IGMP proxy. Otherwise, the IGMP selection will not be valid. 
 
Where can I download the free software to test IGMP? 
 
Encapsulation: The different types of encapsulation include PPPoA VC-Mux, PPPoA LLC, 
1483 Bridged IP LLC, 1483 Routed IP LLC, 1483 Bridged IP VC-Mux, 1483 Routed IP 
VC-Mux, Classical IP over ATM, PPPoE VC-Mux, PPPoE LLC, and PPPoENone. 
 
5.2.1 ATM 
VPI: Virtual Path Identifier is a virtual path used for cell routing that is identified by an eight bit 
field in the ATM cell header. The VPI field specifies this eight bit identifier for routing. 
 
Range: 0-255   
Default: 0 
 
VCI: A Virtual Channel Identifier is a virtual channel that is identified by a unique numerical tag 
that is defined by a 16-bit field in the ATM cell header. The purpose of the virtual channel is to 
identify where the cell should travel. The VCI field specifies this 16 bit numerical tag that 
determines the destination. 
 
Range: 0-65535 
 
Default: 35 
 
Service Category: This field allows you to select from the following service categories. 
 
 
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