Hi Azniazi,
I was also searching on the bandwidth throughput on Cisco 2951 when i came upon seeing your entry on this subject.
Seeing your bandwidth utilization that reaches beyond 75Mbps and even touches 300Mbps mark indicates that the Cisco documentation on the 75Mbps recommendation is based on fully loaded services. And I'm curious to know what's running on that router that enables it go to beyond 75Mbps. ( routing protocols, BGP, ISIS, NAT, Firewall , how many number of ACL lines, MPLS configured, etc)
You mentioned that there's a 320Mbps interlink in between this router and maybe another similiar router and wonders why the utilization barely hits 320Mbps mark except on one occasion. when it comes to link provisioned by the local loop provider or telco service provider, we often gets the notion if we subscribe bandwidth , let say 320 Mbps , we should get 320 Mbps, which is partially true, however in order to get that 320Mbps, we need to have the traffic demand or generate traffic that goes up to 320Mbps.
Outside production phase, during provision stage or in a maintenance window, you could request from the local loop provider to have a throughput test conducted between this two sites but have it conducted from the Router's Gigabit LAN interface instead. The Provider may not be accountable for the router performance, but this is to see your router performance and with the interlink provisioned.
Hope this gives you an idea for the router throughput performance.
