Multicast Error Message

I am getting the following error message on my catalyst 6506 switches:
2007 Oct 26 13:41:21 EST -04:00 %MCAST-5-RX_IGMPREPORT: IGMP: Rcvd IGMP Report 01-00-5e-00-00-02 on 3/11
I receive the message on numerous trunk ports and the multicast MAC will vary.
The only info I've found online is that the message is informational only. I am seeing tons of these messages and would like to know if it's normal and what should be done about it.... if anything.

This may be a cause of concern . Typically the address range 224.0.x will map to the multicast mac of 01-00-5e-00-00-xx. What the switch is complaining about is that some one is sending an IGMP join for a group that should be used by only control protocols like OSPF , PIM , EIGRP etc. The key is to always use a multicast ip with a non-zero second and 3rd octet so that it never maps to the mac address that falls into a range of control protocols. This problem is due to 32:1 mapping of Multicast ip to mac addresses. What that means is potentially 32 multicast ip addresses could have the same mac address. For example 224.0.0.1 , 225.0.0.1 , 239.0.0.1 will all map to 0100.5e00.0001 . Now even though 225.0.0.1 and 239.0.0.1 have nothing to do with control protocols and should be perfectly fine to be used by users , the mac addres however ends up mapping to a well-known mac address and hence the syslog message that you are seeing . using a multicast ip with non-zero second and 3rd octet will result in multicast ip never mapping to a well known mac address.
Hope this helps.
Thanks
Salman.

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One thing to check is that you aren't trunking all of your VLAN to the WLC, just the ones that support wireless clients.
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Greetings Fellow Forumers!
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Greetings Fellow Forumers!
I have an annoying issue caused by (I think) the firmware (carl9170) necessary to allow my USB NIC to work. The issue itself is that this message will pop up on my console and TTY:
ieee80211 phy0: invalid plcp cck rate (0)
I have searched the forums and found nothing (as of yet). I have, however, found some sparse information on the Internet but it isn't very helpful. Most of what I've read describes the behaviour itself (the error messages spamming the screen) and developers who figured out that it is the firmware causing this behaviour. I have yet to find information about how to solve this issue and stop the error from repeating itself ad nauseum. What I have read so far also hasn't cast any illumination about the underlying cause as to why the error message is being printed in the first place.
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bus info: usb@2:2
logical name: wnet
capabilities:
ethernet,
Physical interface,
Wireless-LAN
configuration:
broadcast: yes
driver: [i]carl9170[/i]
driverversion: 3.15.8-1-ARCH
firmware: 1.9.6
ip: 192.168.1.74
link: yes
multicast: yes
wireless: IEEE 802.11abgn
If all I can do is suppress this message I'll be happy with that. Admittedly, though, I'll need a hint or two about how to do that.

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What does this error message mean: "Filename: Mips32.ari TFTP Error: 'File not found' in AP-105"?

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I want to download this file Mips32.ari for AP-105 device. Please give me this file download link. APBoot 1.2.4.4 (build 26618)
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dev fn venID devID class rev MBAR0 MBAR1 MBAR2 MBAR3
00 00 168c 0029 00002 01 10000000 00000000 00000000 00000000
01 00 168c 0029 00002 01 10010000 00000000 00000000 00000000
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checksum bad
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T Using eth0 device
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T checksum bad
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T T checksum bad
T checksum bad
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Multicast Error Message

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