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.