Administering TCP/IP
Displaying Multicast information
MAX Administration Guide
7-13
a new IP address is entered it is qualified and accepted on a good entry. If the IP address fails
the check then a message is printed, the IP address is cleared and the user is prompted for an
entry number. If the IP address is correct then is entered into the table and the editor prompts
for another entry number.
Displaying Multicast information
The terminal-server command-line interface provides commands to support IP-multicast
functionality using Internet Group Management Protocol (IGMP). To display the options,
invoke the terminal-server interface (System > Sys Diag > Term Serv) and enter the Show
IGMP and/or show Mrouting command with a question mark:
ascend% show igmp ?
show igmp ?Display help information
show igmp statsDisplay IGMP Statistics
show igmp groupsDisplay IGMP groups Table
show igmp clientsDisplay IGMP clients
ascend% show mrouting ?
show mrouting ?Display help information
show mrouting statsDisplay MROUTING Statistics
Displaying the multicast forwarding table
To display active multicast group addresses and clients (interfaces) registered for each group:
ascend% show igmp groups
IGMP Group address Routing Table Up Time: 0:0:22:17
Hash Group Address Members Expire time Counts
N/A Default route *(Mbone) ...... 2224862
10 224.0.2.250
2 0:3:24 3211 :: 0 S5
1 0:3:21 145 :: 0 S5
0(Mbone) ...... 31901 :: 0 S5
Table 7-5 describes the output of the Show IGMP Groups command.
Table 7-5. Output of the Show IGMP Groups command
Field
Description
Hash
Index to a hash table that is displayed for debugging purposes only.
The Default route is not an entry in the hash table.
Group Address
IP multicast address used. The Default route is the interface on
which the multicast router resides.
Note:
The IP multicast address being monitored is marked with an
asterisk, meaning that this address is joined by local application.