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Page 58 NB1300Plus4 ADSL Modem
Advanced
ATM:
Service Category: UBR and CBR are supported from the ATM.
Bandwidth: Bandwidth setting takes effect only when the CBR is selected. The maximum
available bandwidth is from the upstream data rate of ADSL status page.
Encapsulation: Bridge 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.
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.
Q: Where can I download the free software to test IGMP.
A: Please go to this link http://manimac.itd.nrl.navy.mil/MGEN/.
PPP: The current release supports multiple PPP sessions per PVC. The PPP configuration
in the WAN configuration page is for the first PPP session for each PVC. The predefined
PPP Account Name (Account ID) is "Simple PPP Account 0" for PVC0 and predefined PPP
Connection Name is "Simple PPP Session 0" for PVC0. For the other PVC X, the predefined
account name and connection name will be Simple PPP Account X and Simple PPP Session
X. X is the PVC number from 1 to 7.
It can support up to total of 16 PPP sessions, and each PVC can support up to 8 PPP
sessions. The multiple PPP sessions may be configured with any combination over 8 PVCs.
For the multiple PPP sessions, please go to PPP Configuration page (Section 6.3).
Service Name: The service name of PPP is required by some ISPs. If the ISP does not
provide the Service Name, please leave it blank.
Disconnect Timeout: The Disconnect Timeout allows the user to set the specific period of
time to disconnect from the ISP. The default is 0, which means never disconnect from the
ISP.
DHCP Client: Use Table 6-1 to configure a valid setting for each PVC.
MRU: Maximum Receive Unit indicates the peer of PPP connection the maximum size of
the PPP information field this device can be received. The default value is 1492 and is used in
the beginning of the PPP negotiation. In the normal negotiation, the peer will accept this
MRU and will not send packet with information field larger than this value.