"Normal" is whatever is required for correct functioning on a particular LAN, and as such, can vary greatly. For instance, Windows hosts, depending on their configuration where they are doing more host name resolution through the NetBIOS calls (i.e. pre-WINS), will issue many more broadcasts then if relying on IP host name resolution.
As a very rough rule, if there's more than 1% of the bandwidth being consumed by broadcasts, you might want to investigate whether it's valid and whether it could be reduced. As another rough rule, if activating some type of broadcast suppression, again without a baseline, you might try 50%.
"hi there, so if I have more than 1 percent broadcasts on my lan, then i need to look into it? "
Probably be a good case to do so. In normal operations, especially IP, there are few valid reasons to send to ALL hosts. Even when there are valid reasons, a well behaved application will minimize the need to do do. For instance, ARP uses a broadcast to find a destination's IP to MAC but then caches the result.
"when rate limiting broadcasts say to 10% on the interface, does that mean that 10% of the interface speed is only allowed for broadcasts?"
You would need to verify that on the platform in question, but I would expect that to be the case in most instances.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
Im studying the 100-105 book by Odom and am currently on the topic of Port security. I purchased a used 2960 and I'm trying to follow a...
While deploying a number of 18xx/2802/3802 model access points (APs), which run AP-COS as their operating platform. It can be observed on some occasions that while many of their access points were able to join the fabric WLC withou...
I am going to design and build an LAN network under a tunnel underground with long distance between the switches.
I will have 2 Catalyst switches and 8 Industrial IE3000, and they will be connected with fiber.
For now I am planning on use Layer-2 s...