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Limit broadcast traffic with a switch

Posted on 2006-06-13
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Last Modified: 2012-06-21
Can someone make a recommendation for me? I am trying to implement a new switch for some controls machines we are developing that need to be networked. They are horrible for sending out broadcast traffic. In our current site, I have implemented several VLANS which have helped out greatly. This is not possible in this scenario as it is a customer buying this and I can only make suggestions.

My question is I did a little research on a Cisco 2955 switch and a N-Tron 508TX-A switch which both support IGMP snooping. As I understand it, this can help eliminate the broadcast traffic which in some cases has brought the network to a crawl by overloading the switches. What info may be helpful for me in determining if these are good options.

Next question is: Using Cisco’s software to view all cisco devices, is it possible to view another manufactures switch? (I don’t recall the name of the program)

Did I give enough information? I will post anything else that helps you understand my situation.
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Question by:adembo
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Scotty_cisco earned 500 total points
ID: 16894890
Adembo;

I think maybe your a bit confused as to what IGMP snooping does;  IGMP snooping is for multicast not broadcast.  It is a layer 2 function looking at a specific mac address for a group.  If snooping is enabled the switch will kill all multicast packets without a specific Join to the group.  The broadcasts are not going to be identified because the mac is all FF:FF's but the an IGMP or multicast packet starts 01005e ect and so it looks at the header.

Have you looked at storm control on cisco switches?  What happens to these devices if the broadcasts don't get out I assume that they are fine.  I would look at storm control and flooding controls and see if that works but in most cases that will shut a port down not just stop the broadcasts.  

Cisco software as far as I am aware does not look at other vendors hardware it looks at specific HTML files on a cisco switch that are on the flash:html/ directory.

Thanks
scott
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by:adembo
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Yes, I was confused on IGMP snooping. Thanks for the info.
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