mrinfo(8)mrinfo(8)NAMEmrinfo - Displays configuration information from a multicast router
SYNOPSIS
/usr/sbin/mrinfo [-d debug_level] [-r retry_count] [-t timeout_count]
multicast_router
OPTIONS
Sets the debug level. When the debug level is greater than 0 (the
default), additional debugging messages are printed. Regardless of the
debug level, if an error condition occurs, mrinfo writes an error mes‐
sage and terminates. Nonzero debug levels have the following effects:
Prints packet warnings to stderr. Prints all level 1 messages and
notifications of down networks to stderr. Prints all level 2 messages
and notifications of all packet timeouts to stderr. Specifies the num‐
ber of times to retry a neighbor query. The default is 3 retries.
Specifies the number of seconds to wait for a neighbor to reply to a
query. The default timeout is 4 seconds.
DESCRIPTION
The mrinfo command displays the configuration information from the mul‐
ticast router multicast_router.
The mrinfo command sends the ASK_NEIGHBORS IGMP message to the speci‐
fied multicast router. If the multicast router responds, the response
includes the version number and a list of addresses for their neighbor‐
ing multicast routers. If the responding router has a recent multicast
version number, mrinfo requests additional information such as metrics,
thresholds, and options from the multicast router. Once the specified
multicast router responds, the configuration is displayed to the stan‐
dard output.
RESTRICTIONS
You must be superuser in order to run mrinfo.
EXAMPLES
The following example shows the output of the mrinfo command where
mbone.phony.dom.net is specified as the multicast router: mrinfo
mbone.phony.dom.net 127.148.176.10 (mbone.phony.dom.net) [version 3.3]:
127.148.176.10 -> 0.0.0.0 (?) [1/1/querier]
127.148.176.10 -> 127.0.8.4 (mbone2.phony.dom.net) [1/45/tunnel]
127.148.176.10 -> 105.1.41.9 (momoney.com) [1/32/tunnel/down]
127.148.176.10 -> 143.192.152.119 (mbone.dipu.edu) [1/32/tunnel]
For each neighbor of the queried multicast router, the IP address of
the queried router is displayed, followed by the IP address and name of
the neighbor. In square brackets, the metric (cost of connection) and
the threshold (multicast ttl) are displayed. If the queried multicast
router has a newer version number, the type (tunnel, srcrt) and status
(disabled, down) of the connection are displayed.
SEE ALSO
Commands: map-mbone(8), mrouted(8), mtrace(8)
Networking: mbone.info(7)mrinfo(8)
