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Multicast in a 3750x Stack

I recently created a stack using (2) 3750x switches. I have three vlans on the stack (1,105,241) Vlan 105 is configured on 6509 core switches with multicasting and are connected to the stack via gigabit fiber. It is working well with clients on the Master or SW1, however clients on SW2 do not participate in multicasting Any client pc that is connected to SW2 vlan 105 does not show up in the "sh ip igmp snooping group" command. I can statically assign a client on SW2 to the mcast groups but but they fail to register on their own. I can take the cable connection from SW2 and plug it into an SW1 Vlan 105 port and it immediately becomes a member of the groups. I can then connect it back to the SW2 port and it disappears from the group membership. IGMP and PIM are configured with the defaults. I am Looking for suggestions. 

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VIP Super Bronze

Multicast in a 3750x Stack

Are you running the same exact IOS and license on both devices on the stack?

New Member

Re: Multicast in a 3750x Stack

Here is the Stack Version Info:

512K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address      : C8:9C:1D:10:79:00

Motherboard assembly number    : 73-12553-04 Motherboard serial number      : FDO15030M42 Model revision number          : A0 Motherboard revision number    : A0 Model number                    :

WS-C3750X-48P-S Daughterboard assembly number  : 800-32727-01 Daughterboard serial number    : FDO150307JN System serial number            : FDO1502K043 Top Assembly Part Number        : 800-31324-01 Top Assembly Revision Number    : A0 Version ID                      : V01 CLEI Code Number                : COMJZ00ARA Hardware Board Revision Number  : 0x02 Switch Ports Model             

SW Version            SW Image ------ ----- -----              ----------            ----------

*    1 54    WS-C3750X-48P      12.2(55)SE            C3750E-UNIVERSALK9-M   

     2 54    WS-C3750X-48P      12.2(55)SE            C3750E-UNIVERSALK9-M

Switch 02 --------- Switch Uptime                  : 8 weeks, 5 days, 18 hours, 57 minutes

Base ethernet MAC Address      : CC:EF:48:C3:A7:00 Motherboard assembly number    : 73-12553-05 Motherboard serial number      : FDO15370GN6 Model revision number          : A0 Motherboard revision number    : D0 Model number                    :

WS-C3750X-48P-S Daughterboard assembly number  : 800-32727-01 Daughterboard serial number    : FDO153703T4 System serial number            : FDO1536P1HQ Top assembly part number        : 800-31324-02 Top assembly revision number    : E0 Version ID                      : V02 CLEI Code Number                : COMJZ00ARB

License Level                  : ipbase License Type                    : Permanent Next reboot licensing Level    : ipbase

New Member

Re: Multicast in a 3750x Stack

Since my reply, I have added a third Switch to the Stack. It is a 3750G series Switch. On joining the stack it's ios was upgraded to the same 12.2(55). I can not get the multicasting to work on it either. Multicasting appears to only work with the Master switch.

New Member

I have the same issue, switch

I have the same issue, switch 1 IGMP join ok, switch 2 nothing.  Did you ever find a resolution?

 

Switch Ports Model              SW Version            SW Image                 
------ ----- -----              ----------            ----------               
*    1 30    WS-C3750X-24P      12.2(55)SE5           C3750E-UNIVERSALK9-M     
     2 30    WS-C3750X-24P      12.2(55)SE5           C3750E-UNIVERSALK9-M     

 

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