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Command: mrinfo | Section: 8 | Source: OpenBSD | File: mrinfo.8
MRINFO(8) FreeBSD System Manager's Manual MRINFO(8)
NAME
mrinfo - displays configuration info from a multicast router
SYNOPSIS
mrinfo [-d[debug_level]] [-r retry_count] [-t timeout_count]
multicast_router
DESCRIPTION
mrinfo attempts to display the configuration information from the
specified multicast_router.
mrinfo uses the ASK_NEIGHBORS IGMP message to query the specified
multicast router. If the router responds, the version number and a list
of their neighboring multicast router addresses is part of the response.
If the responding router has a recent multicast version number, then
mrinfo requests additional information such as metrics, thresholds, and
flags from the multicast router. Once the specified multicast router
responds, the configuration is displayed to the standard output.
The options are as follows:
-d[debug_level] sets the debug level. When the debug level is greater
than the default value of 0, additional debugging
messages are printed. Regardless of the debug level,
an error condition will always write an error message
and cause mrinfo to terminate. Non-zero debug levels
have the following effects (printed to stderr):
1 packet warnings.
2 all level 1 messages plus notifications of
down networks.
3 all level 2 messages plus notifications of all
packet timeouts.
-r retry_count sets the neighbor query retry limit. The default is to
do 3 retries.
-t timeout_count sets the number of seconds to wait for a neighbor query
reply. The default timeout is 4 seconds.
EXAMPLES
# 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 of the queried
router is displayed, followed by the IP and name of the neighbor. In
square brackets the metric (cost of connection) and threshold (multicast
ttl) is displayed. If the queried multicast router has a newer version
number, the type (tunnel, srcrt) and status (disabled, down) of the
connection is displayed.
SEE ALSO
map-mbone(8), mrouted(8), mtrace(8)
AUTHORS
Van Jacobson
FreeBSD 14.1-RELEASE-p8 December 1, 2024 FreeBSD 14.1-RELEASE-p8