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Community Member

multicast unreachable on same subnet?

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

3 ACCEPTED SOLUTIONS

Accepted Solutions
Community Member

Re: multicast unreachable on same subnet?

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

Cisco Employee

Re: multicast unreachable on same subnet?

Julie,

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

Regards

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
Cisco Employee

Re: multicast unreachable on same subnet?

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

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
3 REPLIES
Community Member

Re: multicast unreachable on same subnet?

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

Cisco Employee

Re: multicast unreachable on same subnet?

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

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
Cisco Employee

Re: multicast unreachable on same subnet?

Julie,

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

Regards

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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