actually, i have about 20 VLANS on my network and about 15 switches spread throughout. However we only use about 10 VLANS, the remaining VLANS are going to our tennants in the building. Does that help?
If you are using VTP to propagate your VLANs to other switches then I'd suggest using the VTP Pruning feature. It will prevent unnecessary VLAN traffic (broadcasts/multicasts) from being sent to switches that don't require it. If you are not using VTP you can specifically allow/disallow VLANs manually on your trunks by using the following command on the trunk interface:
"However, if i just had the trunks carry ONLY the VLAN traffic that it needs to each switch, would i see a big difference in speed on my network?"
Perhaps or perhaps not; it depends. It depends on how much needless traffic is being sent across the trunk, the impact of the needless traffic to the processing of the downstream switches and the processing features of the switches.
On a "typical" LAN, it's unlikely you would see much of a difference. This assuming most traffic is unicast and the switch doesn't need to forward the traffic across the trunk.
However, even beyond other posters mention of routine broadcast, multicast, VTP and STP issues, there's also security to consider. Since you mention tenants in your second post, "routine" traffic might not always be the case. Tenants might be more likely to create an abnormal situation which properly pruned vlans might help mitigate. In other words, it's generally a good idea to contrain vlans to only where needed, but perhaps even more so in your environment even if you don't see any immediate speed improvement.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.