JSI Tip 5627. Mrinfo.exe is the only multicast command-line tool included with Windows.

When you open a CMD prompt and type mrinfo.exe, you receive:

There was no address specified

Usage: mrinfo \[-n?\] \[-i address\] \[-t secs\] \[-r retries\] destination

 -n           Display IP addresses in numeric format
 -i address   Address of local interface to send query out
 -t seconds   Timeout in seconds for IGMP queries (default = 3 seconds)
 -r retries   Number of extra times to send the SNMP queries (default = 0)
 -?           Print Usage
 destination  Address or name of destination
You can use mrinfo.exe to query a multicast router for information about its interfaces and neighbors.


mrinfo -i (router1.test.com.) \[version 11.1,prune,mtrace,snmp\] --> (local) \[1/0/pim/querier/leaf\] --> (router9.test.com.) \[1/0/pim\] --> (router5.test.com.) \[1/0/pim\] --> (router8.test.com.) \[1/0/pim\] --> (router6.test.com.) \[1/0/pim\]
The query is send out the interface. has two interfaces

The --> shows the neighboring interfaces for this router. means that there are no neighboring routers from this interface.

\[1/0/pim/querier/leaf\] is compose of the following elements:

Metric                   -  The cost of the link, used in routing calculations.

TTL Threshold  -  A router forwards a multicast datagram if the TTL in the IP header
                                is greater than the TTL threshold for the interface.
                               This is used to limit the distance packets can travel.

PIM                     - This is the type of routing protocol used. Protocol Independent Multicast.

Querier              - The designated multicast router that sends IGMP Host Membership queries.

Leaf                   -  Indicates that this router is on the edge of the network.

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