Alcatel Carrier Internetworking Solutions 8800 User Manual
Troubleshooting IP Multicast Switching (IPMS)
Troubleshooting IPMS in Debug CLI
OmniSwitch Troubleshooting Guide
September 2005
page 14-8
Note the output of the show ip multicast queriers command during this test:
-> show ip multicast queriers
Source IP VLAN Slot/Port Expire Type
--------------------+----+---------+------+-------
10.10.10.190 1 1/22 146 Dynamic
10.10.10.190 1 1/22 146 Dynamic
The .190 address is that of the uplinked OSR9 in the test.
The show ip multicast neighbors command will show the neighbors in this test network:
-> show ip multicast neighbors
Source IP VLAN Slot/Port Expire Type
--------------------+----+---------+------+-------
10.10.10.34 1 1/22 85 Dynamic
10.10.10.34 1 1/22 85 Dynamic
It is actually unrelated to the test, other than it being in the test network while testing was being done. It is
worthwhile to note that there is a neighbor being listed, and that it, too, was learned from port 1/22, the
uplink port to the OSR9.
worthwhile to note that there is a neighbor being listed, and that it, too, was learned from port 1/22, the
uplink port to the OSR9.
The show ip multicast groups command during the test:
-> show ip multicast groups
Destination IP Source IP VLAN Slot/Port Expire
--------------------+--------------------+----+---------+------
224.0.0.9 10.10.10.220 1 1/22 157
224.0.1.22 10.10.10.54 1 1/22 210
224.0.1.24 10.10.10.222 1 1/22 210
224.77.1.0 10.10.10.51 1 1/7 156
224.77.182.214 10.10.10.51 1 1/7 162
229.55.150.208 10.10.10.222 1 1/22 210
239.255.255.254 10.10.10.5 1 1/22 210
239.255.255.254 10.10.10.222 1 1/22 85
224.0.0.9 10.10.10.220 1 1/22 157
224.0.1.22 10.10.10.54 1 1/22 210
224.0.1.24 10.10.10.222 1 1/22 210
224.77.1.0 10.10.10.51 1 1/7 156
224.77.182.214 10.10.10.51 1 1/7 162
229.55.150.208 10.10.10.222 1 1/22 210
239.255.255.254 10.10.10.5 1 1/22 210
239.255.255.254 10.10.10.222 1 1/22 85
You can match the groups to the associated IP addresses from the above debug command to verify that all
is functioning properly.
is functioning properly.
Note for the debug CLI command:
The command
-> debug ip packet show-multicast on board ni 1 output console
will only set the options for debug. In order to actually see the output, you must enter:
-> debug ip packet start
And to stop the output:
-> debug ip packet stop
Another tip is to enter the full debug ip packet command, then enter debug ip packet stop, to which you
will get a response “...already stopped,” and then enter debug ip packet start. That way, in order to stop the
display, you can simply up-arrow twice and hit enter to stop the display, which will likely be scrolling by
quickly enough so that you cannot see what you are entering!
will get a response “...already stopped,” and then enter debug ip packet start. That way, in order to stop the
display, you can simply up-arrow twice and hit enter to stop the display, which will likely be scrolling by
quickly enough so that you cannot see what you are entering!