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User Guide for the Cisco Multicast Manager 2.3.3
OL-7348-01
Chapter 1 Using the Cisco Multicast Manager
Using the Administration Tool
RP/SG Cache Polling Interval
For certain CMM data, such as the data within the
Multicast Diagnostics page (see the
“Show All
Groups” section on page 1-61
) the CMM queries
each RP, collates a list of active sources, and
groups and displays them. There are 2 ways the
CMM can accomplish this: dynamically when the
command is entered, or the CMM can build a
cache of this information, and when the command
is entered, the cache is queried. Caching is
enabled on the System Configuration page (see
the
“Domain Management” section on page 1-9
)
and the RP/SG Cache Polling Interval is the time
period that this cache is refreshed.
Deciding whether caching should be turned on
depends upon the number of RPs, sources, and
groups. If the Multicast Diagnostics page takes a
while to display all groups, you may want to turn
caching on.
The
Max Threads
value controls how many
devices are queried simultaneously. Values can be
1-10. Queries used for RP/SG Cache Polling are
SNMP getbulk queries that can potentially return
large amounts of data. To address timeouts, you
can reduce the number of Max Threads and/or
adjust the SNMP timeout and retry values on the
System Configuration page (see the
“Domain
Management” section on page 1-9
).
RP Status Polling Interval
RP Status Polling queries the sysUpTime of the
RPs configured on the RP Polling Configuration
page (see the
“RP Polling” section on page 1-28
).
The purpose of this query is to report availability
of the RPs. If the RP responds, an
rpReachable
trap is sent. If the RP does not respond, an
rpUnreachable
trap is sent. Since at least one of
these traps is sent at each polling interval, you can
also use them to ensure that the polling daemon is
up and running.
RPF Failure Polling Interval
Time interval that each router will be polled for
each source and group configured to check the
number of RPF failures.
Threshold Polling Interval
Time interval that each router will be polled for
the existence of each source and group
configured, and CMM will ensure that no
thresholds are exceeded.
Field or Button
Description
