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Single Vlan /23 mask

Posted on 2011-03-23
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Last Modified: 2012-05-11
Hello

I am working on performance issue with a Government agency that has approx 100 user's. I took a trace using Wireshark, before any apps were opened, and notice that from this one PC I am seeing "a ton" of chatter from protocols such as (MAPI, ARP, NBMS, DCERPC, EPM, DHCP, HTTP, IGMP, SAP, LLMNR, LWAP, STP, TCP, UDLD and UDP) from other PC on same vlan as well as Outlook.

I know the Vlan is a single broadcast domain, but are there Network or PC settings that can minimize this?

Thanks

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Question by:scoad5
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surbabu140977 earned 500 total points
ID: 35201528
If you know, who is talking what to whom, you can try defining ACL.

Otherwise I am not aware technically of anything else that will limit your traffic. It's the very same problem/reason which has evolved the concept of vlan. If any other methods would have been there, we would be sitting in a non-vlan world now. :)

Make another vlan and that would cut your broadcast traffic automatically. That's the most simple solution you can get. Please remember that even a faulty NIC of any PC is enough to bring down your entire network with broadcast storms not to mention any trojan/virus attack.

Best,
 
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by:scoad5
ID: 35207213
Surbabu

Thank you for you input. Prior to my coming to this position the vlan was increased in size from /24 to /23 because they were running out of addresses. I will splitting Vlan 1 into (2) seperate Vlans.


Thanks again

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