CiM-550 IP Enabled Satellite Modem

Rev. 2

SNMP interface

CD/CIM550.IOM

13.4.2.4PROTOCOLS GROUP

13.4.2.4.1 IGMP Configuration Subgroup

Note: This subgroup will only be accessible in the MIB tree if the IGMP FAST feature has been purchased and activated. Otherwise, both gets and sets on these OIDs will return errors.

Table 13-28. IGMP Configuration Subgroup OIDs

OID

Description

cimIgmpTable

Reports the host groups being routed by the

 

modem. This table shows the minimum time before

 

a host group will be put out of service.

cimIgmpEnable

Allows a user to enable or disable the IGMP

 

feature. When enabled, multicast packets received

 

from the Satellite Interface are forwarded to the

 

Ethernet Interface if a host on the Ethernet LAN

 

has joined the host group via an IGMP report.

cimIgmpQueryPeriod

Defines the time interval (in seconds) in which the

 

modem sends out its host membership Query

 

messages.

cimIgmpMaxRespTime

Defines the time interval (in seconds) that the

 

modem waits before it assumes that no hosts are

 

interested in the membership query. The max

 

response time is 25 seconds.

cimIgmpMaxMissBeforeDrop

Number of unanswered queries that must occur

 

before the modem assume that that group has no

 

local members and that it need not forward

 

remotely-originated multicasts for that group onto

 

the local network.

cimIgmpRecognizeQueries

Allows the modem to respond to a Query by

 

generating Host Membership Reports, telling each

 

host group to which it belongs on the network

 

interface from which the Query was received.

cimIgmpVersionUnsolicitedReports

Defines which version of the IGMP protocol should

 

be followed when attempting to join a host group

 

via an unsolicited report.

cimIgmpForceAlertOption

Provides a mechanism whereby routers can

 

intercept packets not addressed to them directly,

 

without incurring any significant performance

 

penalty. Some Cisco routers may require the

 

definition of a Router Alert Option to recognize a

 

report from a host to join a host group.

cimIgmpUnsolicitedReportInterval

Configures the modem to generate an unsolicited

 

report within a specified time intervals (in seconds)

 

after joining a host group.

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