How long is an entry stored in the switch's fdb?

Question

network hardware

What to proceed from when setting a parameter in the switch?
Little is bad, too much is too.
The question is very cloudy, I know. I would like to hear ideas on the approximate calculation of the parameter.
By the way, the experience from the life of the parameter values ​​\u200b\u200bthat you encountered is also interesting

Answer 1

It all depends on what price category of the switch we are talking about and how many subscribers / devices it serves.
It's one thing - a regular D-Link DES-1210 with a table size of 8K entries and a collision of MACs, which is in a single network for 5K subscribers without distinctions by VLANs, and another thing is an "adult" Cisco, which will let 50K subscribers cough and not notice it .
In principle, the default value: 300 is quite suitable in most cases.
You yourself have to decide which value is better, because. you need to analyze exactly your parameters - the number of subscribers, the network topology, the type of equipment used.