Planet ADE-3100, Руководство пользователя

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IGMP: IGMP (Internet Group Management Protocol) relay/proxy specification and environment, default is
Disabled. IGMP is available in all modes and all encapsulations. Support IGMP proxy/relay function for
Router, based on the following requirement and cases:
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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.
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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.
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Not necessary to relay multicast routing between two ADSL PVCs or two interfaces in LAN side.
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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 1 Relay to Ethernet
IGMP report 1 Ignore
IGMP leave 1 Ignore
ADSL
General Multicast IP - Relay it to Ethernet
IGMP query 1 Ignore
IGMP report 1 Relay to all ADSL PVCs
IGMP leave 1 Relay to all ADSL PVCs
Ethernet
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.
Q. Where can I download the free software to test IGMP?
Answer: Please go to this link http://manimac.itd.nrl.navy.mil/MGEN/ .
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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UBR (default): When configured as UBR (Unspecified Bit Rate), traffic is delivered with best
efforts but with no guarantee. This allows for fluctuation in times of temporary increase of available
bandwidth. For example, if a PVC with CBR is temporarily inactive, the PVC(s) with UBR will utilize
that bandwidth while it is available. UBR is intended for applications that do not require any
maximum bound on the transfer delay.
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CBR: When a PVC is specified as a CBR (Constant Bit Rate), that PVC is guaranteed a certain
bandwidth, characterized by the Peak Cell Rate (PCR). The CBR does not have to transmit with a
peak cell rate, and when it does, it is only when the bandwidth specified by the PCR is guaranteed.
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VBR-nrt: An PVC enabled with VBR-nrt (Variable Bit Rate - non real time) can transmit a cell only
if the PVC has a token available. The PVC accumulates tokens at the rate of the Sustainable Cell