multicast unreachable on same subnet?

Answered Question
Nov 25th, 2008

Greeting

I have a simple multicasting problem, but is so difficult to me.

two machine plug into a cat6500, same vlan and same subnet. the subnet is no routing.

host configuration is:

interface GigabitEthernet12/12

switchport

switchport access vlan 111

switchport mode access

mls qos vlan-based

flowcontrol send off

spanning-tree portfast

do I need configure any multicast feature to make two machine can taling in multicast enviroment?

Any comments will be appreciated

Thanks in advance

I have this problem too.
0 votes
Correct Answer by Harold Ritter about 8 years 2 weeks ago

Good point. Or you could also configure an IGMP querier, which will be more efficient as multicast traffic wll not be flooded on all ports for that vlan. Refer to the following document for more information on how to configure an IGMP querier.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/snooigmp.html#wp1069655

Regards

Correct Answer by Harold Ritter about 8 years 2 weeks ago

Julie,

You shouldn't need to enable anything for it to work.

Regards

Correct Answer by markausten about 8 years 2 weeks ago

If the receiver is not sending an IGMP join you need to turn of IGMP Snooping.

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Overall Rating: 5 (3 ratings)
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Correct Answer
markausten Tue, 11/25/2008 - 15:25

If the receiver is not sending an IGMP join you need to turn of IGMP Snooping.

Correct Answer
Harold Ritter Tue, 11/25/2008 - 15:48

Good point. Or you could also configure an IGMP querier, which will be more efficient as multicast traffic wll not be flooded on all ports for that vlan. Refer to the following document for more information on how to configure an IGMP querier.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/snooigmp.html#wp1069655

Regards

Correct Answer
Harold Ritter Tue, 11/25/2008 - 15:27

Julie,

You shouldn't need to enable anything for it to work.

Regards

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