I currently have a GRE/IPSec tunnel setup between 2 2611XM routers with 4 Mbs bandwidth between the 2 sites. When transferring data between the 2 sites I get around 90Kbs over the GRE/IPSec tunnels and the CPU usage maxes out during the data transfer. Without IPsec I get usage of the full bandwidth.
I'm looking to replace these routers with a couple of Cisco 1812's or maybe even Cisco 871's, as this link is only a backup.
Does anyone know what the performance of these 2 routes is like with reagrds to GRE/IPSEC?