Hard to tell what is meant when imprecise terms like slow and fast are used. But access via the serial console is generally going to be much slower than via ssh or telnet. It is by default only 9600 bps after all. Is this what you are experiencing?
Looks to me like you're having a management access bottleneck at the console. Your output on the switch that you've SSH'ed to from the console connection will not be presented to you any faster than the console can support, which is 9600 bps. Your direct SSH access is faster because it's at LAN speed from end to end. You don't have that when you SSH through console.
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.