You do not tell us anything about the connections between the 3550s or about the connections between the 2800s. It is possible that there are differences in the connections that would explain part of the performance difference that you describe. Can you clarify the connectivity? It would also be helpful to see configuration details from all devices so that we could see if there is some configuration difference that might explain some of the difference.
Another point is that there are significant differences in the IOS that you are running. I am confident that the difference in the 2800 option of fast tunneling not being on the 3550 reflects the differences between 12.1(22) and 12.4(4a). If you get roughly equivalent IOS on both types of devices you are likely to have the same options (and perhaps closer to the same performance).
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.