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C3750x running 12.2(58)SE2 unable to "no ip igmp snooping tcn flood"


I have 2 c3750x as the core of our multicast network. Its a very simple design with only 1 VLAN for multicast. But we have over 100 devices connected, and some of them are spanning-tree capable.  Anytime one of those connected to the network, we get spikes, and recently spikes were appraoching gigabit scale, so we really need "no ip igmp snoopinh tcn flood" on each interface to avoid overloading.

However, our switchs didn't seem to understand the command, I get unrecognised command after entered "no ip igmp snooping tcn flood" on an interface. I checked with our local CCIEs and vendor, they all said our switchs and sw image should support such command.

Any suggestion or hints would be very much appreciated.



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System returned to ROM by power-on

System restarted at 15:09:51 HKT Wed Mar 20 2013

System image file is "flash:/c3750e-universalk9-mz.122-58.SE2/c3750e-universalk9-mz.122-58.SE2.bin"

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License Level: lanbase

License Type: Permanent

Next reload license Level: lanbase

cisco WS-C3750X-48 (PowerPC405) processor (revision A0) with 262144K bytes of memory.

Processor board ID

Last reset from power-on

3 Virtual Ethernet interfaces

1 FastEthernet interface

52 Gigabit Ethernet interfaces

2 Ten Gigabit Ethernet interfaces

The password-recovery mechanism is enabled.

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

Base ethernet MAC Address       :

Motherboard assembly number     : 73-12552-08

Motherboard serial number       :

Model revision number           : A0

Motherboard revision number     : A0

Model number                    : WS-C3750X-48T-L

Daughterboard assembly number   : 800-32727-03

Daughterboard serial number     :

System serial number            :

Top Assembly Part Number        : 800-31326-07

Top Assembly Revision Number    : B0

Version ID                      : V04

CLEI Code Number                :

Hardware Board Revision Number  : 0x04

Switch Ports Model              SW Version            SW Image                

------ ----- -----              ----------            ----------              

*    1 54    WS-C3750X-48       12.2(58)SE2           C3750E-UNIVERSALK9-M    

Configuration register is 0xF

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