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

<b>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</b>
You can use mrinfo.exe to query a multicast router for information about its interfaces and neighbors.

Example

mrinfo -i 172.16.174.66 172.16.172.1

172.16.172.1 (router1.test.com.) \[version 11.1,prune,mtrace,snmp\]
172.16.172.1 --> 0.0.0.0 (local) \[1/0/pim/querier/leaf\]
172.16.245.227 --> 172.16.245.229 (router9.test.com.) \[1/0/pim\]
172.16.245.227 --> 172.16.245.225 (router5.test.com.) \[1/0/pim\]
172.16.245.227 --> 172.16.245.228 (router8.test.com.) \[1/0/pim\]
172.16.245.227 --> 172.16.245.226 (router6.test.com.) \[1/0/pim\]
The query is send out the 172.16.174.66 interface. 172.16.174.1 has two interfaces

The --> shows the neighboring interfaces for this router.

0.0.0.0 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.