Wireless ADSL Modem User’s Manual 29
Following settings are necessary when working under this mode:
•
VPI/VCI
•
Encapsulation: 1483 Bridged IP LLC
•
Bridged: Enabled
•
NAT Configuration: Disabled
•
LAN DHCP Server: Disabled
Please see scenario 1: Bridge Mode Configuration Table in Appendix for more detail
configuration.
IGMP
IGMP relay/proxy specification and environment:
•
Support IGMP proxy/relay function for ADSL modem, based on the following
requirement and case.
•
On CO side, there must be at least one IGMP querier (router) present. IGMP
querier will send IGMP query packet. The ADSL modem is responsible to relay
these IGMP query to Ethernet.
•
End-user multicast application device send IGMP report while receiving IGMP
query or being activated by user, the ADSL modem should be responsible to
proxy (that is, change source IP to ADSL modem’s WAN IP) the IGMP report to
ADSL WAN side, include 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 for Packet Process
Rx Entity
Packet Class
TTL
Action
Notes
ADSL
IGMP query
1
Relay to Ethernet
IGMP
report
1
Ignore
IGMP leave
1
Ignore
General Multicast IP
-
Relay it to Ethernet.
Ethernet
IGMP query
1
Ignore
IGMP report
1
Relay to all ADSL PVC
IGMP leave
1
Relay to all ADSL PVC
General Multicast IP
-
Ignore
Note: 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.
